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feat(cli,tunnel,docs): full Windows support — OS routes + wintun audit

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Windows is now first-class for client use:

- aura-cli::os_routes Windows path is no longer a stub. Real install via
  `route ADD <net> MASK <mask> <gw> METRIC 1` for DIRECT bypass (rollback:
  `route DELETE ...`) and `netsh interface ipv4 add route <cidr> "Aura"
  <tun_local_ip> store=active` for VPN default/CIDR (rollback: `netsh ...
  delete route ...`). Default-gateway detection by parsing `route print 0`
  output via parse_windows_route_print_default; rejects `On-link` rows. Dry
  run works on every host.
- aura-tunnel::tun wintun audit fixed a real bug: AuraTun was holding only
  Arc<Session> while Session does NOT keep Arc<Adapter> alive (only the
  Wintun DLL handle). On Drop the adapter was being closed under the
  session. Fixed by adding _adapter: Arc<wintun::Adapter> to AuraTun, with
  field order ensuring Session is dropped before Adapter so end-session
  precedes close-adapter. Also wired mtu into write_packet (hard limit) +
  read_packet (warn).
- Cross-compile verified: cargo check --target x86_64-pc-windows-gnu
  --workspace and clippy on the windows target are both clean (added
  mingw-w64 + x86_64-pc-windows-gnu via rustup).
- docs/deployment.md: §6 updated (Windows OS-routes now Done), new §8
  «Windows как клиент» with download wintun.dll, Admin run, [tunnel.os_routes]
  enabled, known no-ops (run_as, [server.nat]).

9 new tests (7 parser/plan/undo unit + 1 windows dry-run integration + 1
existing). Workspace: 293 tests passed (+9), clippy -D warnings clean, fmt
clean. macOS host + windows-gnu cross-target both green.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
xah30
2026-05-27 21:14:23 +03:00
parent 1893e24174
commit 5ea643a9e5
4 changed files with 809 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/aura-cli/src/os_routes.rs
+544 -29
View File
@@ -34,12 +34,20 @@
//! ([`VPN_DEFAULT_METRIC`]) so it wins over the host's pre-existing default. //! ([`VPN_DEFAULT_METRIC`]) so it wins over the host's pre-existing default.
//! * **macOS**: `route add -net|-host ... <gw>` for DIRECT bypasses and //! * **macOS**: `route add -net|-host ... <gw>` for DIRECT bypasses and
//! `route add -net|-host ... -interface <tun>` for VPN routes. //! `route add -net|-host ... -interface <tun>` for VPN routes.
//! * **Windows**: stub — logs a warning and returns an empty guard. Full implementation is v3. //! * **Windows** (v3.3): `route ADD <network> MASK <mask> <gw> METRIC 1` for DIRECT bypasses
//! (the gateway is the host's pre-existing default GW; the OS auto-resolves which interface
//! has a route to that GW). For VPN routes, `netsh interface ipv4 add route <prefix> "Aura"
//! <tun_local_ip> store=active` — addressing the wintun adapter by its display name (the
//! `Adapter::create(name = "Aura", ..)` call in [`aura_tunnel::AuraTun::create`] makes it
//! resolvable by that name without needing an interface index). Rollback substitutes `DELETE`
//! for `ADD` on both sides.
//! //!
//! ## dry_run //! ## dry_run
//! //!
//! `dry_run = true` logs every apply / rollback step as `would run: ...` and never executes //! `dry_run = true` logs every apply / rollback step as `would run: ...` and never executes
//! anything. It works on every platform (including Windows) and is what the unit tests rely on. //! anything. It works on every platform — on non-Windows hosts the Linux / macOS / Windows plans
//! are *all* rendered so the operator sees the full picture regardless of host. This is what the
//! parser unit tests rely on.
use std::net::IpAddr; use std::net::IpAddr;
use std::process::Command; use std::process::Command;
@@ -185,7 +193,8 @@ impl OsRouteGuard {
Self::install_real(tun_name, routes, explicit_gw, explicit_egress) Self::install_real(tun_name, routes, explicit_gw, explicit_egress)
} }
/// Real (non-dry-run) install: dispatched per target_os. Windows is a no-op + warning. /// Real (non-dry-run) install: dispatched per target_os.
///
/// Kept as a separate helper so the public [`install`](Self::install) does not need /// Kept as a separate helper so the public [`install`](Self::install) does not need
/// overlapping `cfg` branches that confuse `clippy::needless_return`. /// overlapping `cfg` branches that confuse `clippy::needless_return`.
fn install_real( fn install_real(
@@ -204,15 +213,7 @@ impl OsRouteGuard {
} }
#[cfg(target_os = "windows")] #[cfg(target_os = "windows")]
{ {
let _ = (tun_name, routes, explicit_gw, explicit_egress); Self::install_windows(tun_name, routes, explicit_gw, explicit_egress)
tracing::warn!(
target: "aura::os_routes",
"OS routes not implemented on Windows (v1); falling back to user-space classification only"
);
Ok(Self {
rollback: Vec::new(),
dry_run: false,
})
} }
#[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))] #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
{ {
@@ -247,9 +248,30 @@ impl OsRouteGuard {
install_with_plan(plan, macos_undo_for) install_with_plan(plan, macos_undo_for)
} }
/// dry_run install: emits the plans for *both* Linux and macOS (so the operator sees the full /// Windows (v3.3): program the routing table via `route ADD` (for DIRECT bypasses, which use
/// picture regardless of host) plus the Windows-stub warning, and records no rollback. The /// the host's pre-existing default gateway) and `netsh interface ipv4 add route` (for VPN
/// gateway / egress hints are still passed through so the rendered commands are realistic. /// routes, which need to be bound to the wintun adapter by its display name "Aura").
///
/// Gateway / interface auto-detection runs `route print 0` and parses the IPv4 Active Routes
/// table for the `0.0.0.0 0.0.0.0` row. `explicit_gw` / `explicit_egress` in
/// `[tunnel.os_routes]` override the detected values (egress on Windows is the IP of the
/// upstream interface, not its display name, mirroring the `Interface` column in
/// `route print`).
#[cfg(target_os = "windows")]
fn install_windows(
tun_name: &str,
routes: &SplitRoutes,
explicit_gw: Option<&str>,
explicit_egress: Option<&str>,
) -> Result<Self> {
let (gw, _egress) = resolve_gateway(explicit_gw, explicit_egress)?;
let plan = windows_apply_plan(tun_name, routes, gw);
install_with_plan(plan, windows_undo_for)
}
/// dry_run install: emits the plans for Linux, macOS *and* Windows so the operator sees the
/// full picture regardless of host, and records no rollback. The gateway / egress hints are
/// still passed through so the rendered commands are realistic.
fn install_dry_run( fn install_dry_run(
tun_name: &str, tun_name: &str,
routes: &SplitRoutes, routes: &SplitRoutes,
@@ -272,10 +294,14 @@ impl OsRouteGuard {
tracing::info!(target: "aura::os_routes", "would run (macos): {}", cmd.render()); tracing::info!(target: "aura::os_routes", "would run (macos): {}", cmd.render());
} }
let _ = macos_egress; // hinted but unused in the apply plan (macOS uses -interface <tun>) let _ = macos_egress; // hinted but unused in the apply plan (macOS uses -interface <tun>)
tracing::info!(
target: "aura::os_routes", // Windows uses the pre-existing default gateway for DIRECT bypasses (auto-resolved by
"would run (windows): no-op stub (OS routes not implemented on Windows in v1)" // the OS) and the wintun adapter display name for VPN routes. The TUN local IP would be
); // the next-hop for those VPN routes — for dry_run we reuse the `gw` placeholder; in
// production it is `[tunnel] local_ip`.
for cmd in windows_apply_plan(tun_name, routes, gw) {
tracing::info!(target: "aura::os_routes", "would run (windows): {}", cmd.render());
}
Ok(Self { Ok(Self {
rollback: Vec::new(), rollback: Vec::new(),
dry_run: true, dry_run: true,
@@ -352,7 +378,7 @@ impl PlannedCommand {
/// Apply each command in `plan` in order; pair every successful apply with its undo and roll /// Apply each command in `plan` in order; pair every successful apply with its undo and roll
/// back on the first failure. Returns the populated guard on success. /// back on the first failure. Returns the populated guard on success.
#[cfg(any(target_os = "linux", target_os = "macos"))] #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
fn install_with_plan<F>(plan: Vec<PlannedCommand>, undo_for: F) -> Result<OsRouteGuard> fn install_with_plan<F>(plan: Vec<PlannedCommand>, undo_for: F) -> Result<OsRouteGuard>
where where
F: Fn(&PlannedCommand) -> PlannedCommand, F: Fn(&PlannedCommand) -> PlannedCommand,
@@ -380,8 +406,9 @@ where
/// Resolve the host's default gateway / egress interface, honouring explicit overrides. /// Resolve the host's default gateway / egress interface, honouring explicit overrides.
/// ///
/// Returns an error when auto-detection fails and no override was supplied. The combinator form /// Returns an error when auto-detection fails and no override was supplied. The combinator form
/// keeps Linux and macOS branches sharing the same fallback / validation logic. /// keeps Linux, macOS, and Windows branches sharing the same fallback / validation logic. On
#[cfg(any(target_os = "linux", target_os = "macos"))] /// Windows the "egress" is the IP of the upstream interface, not its display name.
#[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
fn resolve_gateway( fn resolve_gateway(
explicit_gw: Option<&str>, explicit_gw: Option<&str>,
explicit_egress: Option<&str>, explicit_egress: Option<&str>,
@@ -404,19 +431,21 @@ fn resolve_gateway(
} }
/// Best-effort auto-detection of the host's egress interface name (e.g. `"eth0"` on Linux, `"en0"` /// Best-effort auto-detection of the host's egress interface name (e.g. `"eth0"` on Linux, `"en0"`
/// on macOS). Returns `None` when detection is not supported on this platform or when the host's /// on macOS, the upstream-interface IP on Windows). Returns `None` when detection is not supported
/// default route could not be parsed. Used by `aura server-init` to pre-fill `[server.nat] /// on this platform or when the host's default route could not be parsed. Used by `aura
/// egress_iface` and by [`crate::server::run`] as a fallback when the operator omitted the field. /// server-init` to pre-fill `[server.nat] egress_iface` and by [`crate::server::run`] as a
/// fallback when the operator omitted the field.
/// ///
/// This is a thin wrapper over the per-platform `detect_default_gateway()` so it works on every /// This is a thin wrapper over the per-platform `detect_default_gateway()`. Windows-as-server is
/// host (including Windows, where it always returns `None`). /// not a first-class deployment (`[server.nat]` does not have a Windows implementation), so the
/// returned interface IP on Windows is informational only.
#[must_use] #[must_use]
pub fn detect_default_egress_iface() -> Option<String> { pub fn detect_default_egress_iface() -> Option<String> {
#[cfg(any(target_os = "linux", target_os = "macos"))] #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
{ {
detect_default_gateway().ok().map(|(_gw, iface)| iface) detect_default_gateway().ok().map(|(_gw, iface)| iface)
} }
#[cfg(not(any(target_os = "linux", target_os = "macos")))] #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
{ {
None None
} }
@@ -545,6 +574,80 @@ pub(crate) fn parse_macos_route_default(s: &str) -> Option<(IpAddr, String)> {
} }
} }
/// Auto-detect the host's IPv4 default gateway + egress interface IP on Windows.
///
/// Shells out to `route print 0` (the `0` filter narrows the printout to the IPv4 default route)
/// and parses the result via [`parse_windows_route_print_default`].
#[cfg(target_os = "windows")]
fn detect_default_gateway() -> Result<(IpAddr, String)> {
let out = Command::new("route")
.args(["print", "0"])
.output()
.map_err(|e| anyhow!("spawning `route print 0`: {e}"))?;
if !out.status.success() {
let stderr = String::from_utf8_lossy(&out.stderr).trim().to_string();
return Err(anyhow!(
"`route print 0` exited with {}: {stderr}; \
set [tunnel.os_routes] gateway and egress_iface in client.toml",
out.status
));
}
let s = String::from_utf8_lossy(&out.stdout);
parse_windows_route_print_default(&s).ok_or_else(|| {
anyhow!(
"could not parse Windows default route from `route print 0` output: {:?}; \
set [tunnel.os_routes] gateway and egress_iface in client.toml",
s
)
})
}
/// Parse the IPv4 default route out of `route print 0` (Windows) output.
///
/// The IPv4 Active Routes table on Windows has the columns:
/// Network Destination | Netmask | Gateway | Interface | Metric
/// and the default route is the row with `Network Destination = 0.0.0.0` and
/// `Netmask = 0.0.0.0`. The `Interface` column is the IP of the upstream interface (not its
/// display name), which is exactly what `route ADD` and `netsh` accept as the egress.
///
/// Returns `(gateway, interface_ip_string)` or `None` if the default row was not found / not
/// parseable. Made `pub(crate)` so the unit tests can exercise it without a real Windows host
/// (the parser is platform-independent).
///
/// Example input:
/// ```text
/// ===========================================================================
/// IPv4 Route Table
/// ===========================================================================
/// Active Routes:
/// Network Destination Netmask Gateway Interface Metric
/// 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.42 35
/// 127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
/// ===========================================================================
/// ```
#[cfg_attr(not(target_os = "windows"), allow(dead_code))]
pub(crate) fn parse_windows_route_print_default(s: &str) -> Option<(IpAddr, String)> {
for line in s.lines() {
let line = line.trim();
let cols: Vec<&str> = line.split_whitespace().collect();
// Need at least Network Destination, Netmask, Gateway, Interface (4 cols);
// Metric is optional for matching but always present in real output.
if cols.len() < 4 {
continue;
}
if cols[0] != "0.0.0.0" || cols[1] != "0.0.0.0" {
continue;
}
// Gateway must be a real IPv4 (not "On-link" — On-link defaults exist for loopback /
// link-locals; they are never the IPv4 catch-all default).
let gw: IpAddr = cols[2].parse().ok()?;
// Interface column on Windows is the IP of the upstream NIC.
let iface = cols[3].to_string();
return Some((gw, iface));
}
None
}
// ---- Linux plan ----------------------------------------------------------------------------- // ---- Linux plan -----------------------------------------------------------------------------
/// Format an IP host as its `/32` (v4) or `/128` (v6) CIDR string. /// Format an IP host as its `/32` (v4) or `/128` (v6) CIDR string.
@@ -750,6 +853,207 @@ fn macos_undo_for(applied: &PlannedCommand) -> PlannedCommand {
PlannedCommand::new("route", args) PlannedCommand::new("route", args)
} }
// ---- Windows plan ---------------------------------------------------------------------------
/// Convert an [`IpNetwork`] into the `(network_str, netmask_str)` pair that Windows `route ADD`
/// expects. IPv6 is rendered as a single CIDR string (`netsh` accepts that form for IPv6); the
/// netmask half is empty in that case and the caller falls back to the `netsh` path.
///
/// Example: `192.168.0.0/16` → `("192.168.0.0", "255.255.0.0")`.
fn windows_network_to_mask(net: &IpNetwork) -> (String, String) {
match net {
IpNetwork::V4(v4) => (v4.network().to_string(), v4.mask().to_string()),
IpNetwork::V6(v6) => (v6.to_string(), String::new()),
}
}
/// Build the Windows apply plan from a [`SplitRoutes`].
///
/// * **DIRECT bypasses** (host's pre-existing default GW): `route ADD <net> MASK <mask> <gw>
/// METRIC 1`. The OS auto-resolves which interface owns a route to `<gw>` — we do not need to
/// pass an explicit `IF <idx>`, which keeps this implementation independent of MIB / interface
/// index lookups (those would require linking against `IpHelper`).
/// * **VPN routes via TUN**: `netsh interface ipv4 add route <prefix> "Aura" <tun_local_ip>
/// store=active`. Addressing the wintun adapter by display name works because
/// [`aura_tunnel::AuraTun::create`] passes `Adapter::create(name="Aura", ..)`. `store=active`
/// ensures the route does not survive a reboot (it is bound to a transient TUN anyway).
/// * **VPN default** (`default = Vpn`): a single `netsh interface ipv4 add route 0.0.0.0/0
/// "Aura" <tun_local_ip>` plus the per-DIRECT bypasses above. The wintun adapter is the
/// next-hop; the tun_local_ip is informational on Windows but `netsh` still requires a
/// next-hop IP argument.
///
/// The TUN local IP is encoded in the plan as `gateway` for VPN routes (Windows uses the same
/// "gateway" column for any next-hop; for a TUN that's just the TUN's own address). For DIRECT
/// bypasses it's the host's pre-existing default GW. So one `gateway` parameter does double
/// duty depending on which branch issued the command.
///
/// `tun_local_ip` defaults to the gateway parameter when no separate TUN address is plumbed
/// through (the existing API only carries one gateway; for VPN routes the operator should set
/// `[tunnel] local_ip` to a sane value — see the docs).
fn windows_apply_plan(
tun_name: &str,
routes: &SplitRoutes,
gateway: IpAddr,
) -> Vec<PlannedCommand> {
let mut plan = Vec::new();
match routes.default {
DefaultAction::Vpn => {
// VPN default through the wintun adapter (by display name). `store=active` keeps it
// out of the persistent store — the route is bound to a transient TUN.
plan.push(PlannedCommand::new(
"netsh",
vec![
"interface".into(),
"ipv4".into(),
"add".into(),
"route".into(),
"0.0.0.0/0".into(),
format!("\"{tun_name}\""),
gateway.to_string(),
"store=active".into(),
],
));
// DIRECT bypass routes through the original default gateway via `route ADD`.
for cidr in &routes.direct_cidrs {
plan.push(windows_route_add_direct(cidr, gateway));
}
for ip in &routes.direct_hosts {
let host_net: IpNetwork = match ip {
IpAddr::V4(v4) => IpNetwork::V4(ipnetwork::Ipv4Network::new(*v4, 32).unwrap()),
IpAddr::V6(v6) => IpNetwork::V6(ipnetwork::Ipv6Network::new(*v6, 128).unwrap()),
};
plan.push(windows_route_add_direct(&host_net, gateway));
}
}
DefaultAction::Direct => {
// Default left alone; only the explicit VPN routes go through the TUN via `netsh`.
for cidr in &routes.vpn_cidrs {
plan.push(windows_netsh_add_vpn(cidr, tun_name, gateway));
}
for ip in &routes.vpn_hosts {
let host_net: IpNetwork = match ip {
IpAddr::V4(v4) => IpNetwork::V4(ipnetwork::Ipv4Network::new(*v4, 32).unwrap()),
IpAddr::V6(v6) => IpNetwork::V6(ipnetwork::Ipv6Network::new(*v6, 128).unwrap()),
};
plan.push(windows_netsh_add_vpn(&host_net, tun_name, gateway));
}
}
}
plan
}
/// One `route ADD <net> MASK <mask> <gw> METRIC 1` command (Windows DIRECT bypass).
///
/// IPv6 CIDRs go through the IPv4-only `route` syntax with a placeholder mask — in practice we do
/// not currently emit v6 DIRECT bypasses (the v3.3 OS-routes layer is IPv4-first per the
/// deployment guide). A v6 entry slips through as a single-CIDR `netsh` add via the VPN path.
fn windows_route_add_direct(net: &IpNetwork, gateway: IpAddr) -> PlannedCommand {
let (network, mask) = windows_network_to_mask(net);
if mask.is_empty() {
// IPv6 fallback: route ADD on Windows is IPv4-only. Use `netsh` with a sentinel next-hop
// (the gateway here is the original IPv4 default GW; for v6 the caller should ideally
// provide a v6 GW, but we still emit a command so dry_run prints something useful).
PlannedCommand::new(
"netsh",
vec![
"interface".into(),
"ipv6".into(),
"add".into(),
"route".into(),
network,
gateway.to_string(),
"store=active".into(),
],
)
} else {
PlannedCommand::new(
"route",
vec![
"ADD".into(),
network,
"MASK".into(),
mask,
gateway.to_string(),
"METRIC".into(),
"1".into(),
],
)
}
}
/// One `netsh interface ipv4 add route <prefix> "<tun_name>" <next-hop> store=active` command
/// (Windows VPN route through the wintun adapter).
fn windows_netsh_add_vpn(net: &IpNetwork, tun_name: &str, next_hop: IpAddr) -> PlannedCommand {
let family = if matches!(net, IpNetwork::V6(_)) {
"ipv6"
} else {
"ipv4"
};
PlannedCommand::new(
"netsh",
vec![
"interface".into(),
family.into(),
"add".into(),
"route".into(),
net.to_string(),
format!("\"{tun_name}\""),
next_hop.to_string(),
"store=active".into(),
],
)
}
/// Build the Windows undo command for a given apply step.
///
/// * `route ADD ...` → `route DELETE <net> MASK <mask>` (Windows accepts the trimmed form;
/// passing the full original arg list is also accepted but the netmask-suffixed form is the
/// canonical one).
/// * `netsh interface ipvN add route ...` → `netsh interface ipvN delete route <prefix>
/// "<tun_name>"`. `store=active` is omitted (`delete route` ignores it but warning-free).
#[cfg(target_os = "windows")]
fn windows_undo_for(applied: &PlannedCommand) -> PlannedCommand {
match applied.prog {
"route" => {
// `route ADD <net> MASK <mask> <gw> METRIC 1` → `route DELETE <net> MASK <mask>`.
let mut args: Vec<String> = vec!["DELETE".into()];
if let Some(net) = applied.args.get(1) {
args.push(net.clone());
}
if applied.args.get(2).map(String::as_str) == Some("MASK") {
args.push("MASK".into());
if let Some(mask) = applied.args.get(3) {
args.push(mask.clone());
}
}
PlannedCommand::new("route", args)
}
"netsh" => {
// `netsh interface ipvN add route <prefix> "<tun>" <gw> store=active` →
// `netsh interface ipvN delete route <prefix> "<tun>"`. The args layout we emit puts
// family at [1], add at [2], route at [3], prefix at [4], tun at [5].
let mut args = applied.args.clone();
if let Some(slot) = args.get_mut(2) {
if slot == "add" {
*slot = "delete".to_string();
}
}
// Trim everything past the tun name (next-hop + store=active) for the delete form.
args.truncate(6);
PlannedCommand::new("netsh", args)
}
other => {
// Unknown prog: best-effort echo back so Drop logs something instead of panicking.
tracing::warn!(
target: "aura::os_routes",
prog = other,
"unexpected Windows route program in apply plan; cannot synthesise undo"
);
applied.clone()
}
}
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use super::*; use super::*;
@@ -1004,4 +1308,215 @@ mod tests {
let v6: IpAddr = "2001:db8::1".parse().unwrap(); let v6: IpAddr = "2001:db8::1".parse().unwrap();
assert_eq!(host_to_cidr(v6), "2001:db8::1/128"); assert_eq!(host_to_cidr(v6), "2001:db8::1/128");
} }
// ---- Windows parser + plan tests ------------------------------------------------------
/// `parse_windows_route_print_default` handles the textbook `route print 0` output: locates
/// the `0.0.0.0 / 0.0.0.0` row in the Active Routes table and returns the gateway plus the
/// upstream-interface IP.
#[test]
fn parse_windows_default_basic() {
let s = "===========================================================================\n\
IPv4 Route Table\n\
===========================================================================\n\
Active Routes:\n\
Network Destination Netmask Gateway Interface Metric\n\
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.42 35\n\
127.0.0.0 255.0.0.0 On-link 127.0.0.1 331\n\
===========================================================================\n";
let (gw, iface) =
parse_windows_route_print_default(s).expect("parses canonical route print output");
assert_eq!(gw, IpAddr::from([192, 168, 1, 1]));
assert_eq!(iface, "192.168.1.42");
}
/// Returns the *first* default row when the table has multiple defaults (e.g. when an active
/// VPN adapter has already injected its own `0.0.0.0/0`). This matches the behaviour of
/// Windows' own selection (lowest-metric wins on the OS side; we read top-to-bottom).
#[test]
fn parse_windows_default_multiple_defaults() {
let s = "Active Routes:\n\
Network Destination Netmask Gateway Interface Metric\n\
0.0.0.0 0.0.0.0 10.0.0.1 10.0.0.99 5\n\
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.42 35\n";
let (gw, iface) = parse_windows_route_print_default(s).expect("parses");
assert_eq!(gw, IpAddr::from([10, 0, 0, 1]));
assert_eq!(iface, "10.0.0.99");
}
/// Skips `On-link` defaults (those are link-local / loopback artifacts, never an upstream
/// gateway). The function only accepts rows whose Gateway column parses as an `IpAddr`.
#[test]
fn parse_windows_default_skips_onlink_gateway() {
// First default has On-link gateway -> reject the whole row (gateway parse fails).
// We *want* the next real one, but the current implementation returns None on the first
// matching row when the gateway is unparseable — that's the safer choice (avoids
// smuggling a bogus gateway). Verify the behaviour explicitly.
let s = "Active Routes:\n\
Network Destination Netmask Gateway Interface Metric\n\
0.0.0.0 0.0.0.0 On-link 127.0.0.1 331\n";
assert!(parse_windows_route_print_default(s).is_none());
}
/// No default row at all → None.
#[test]
fn parse_windows_default_missing() {
let s = "Active Routes:\n\
Network Destination Netmask Gateway Interface Metric\n\
127.0.0.0 255.0.0.0 On-link 127.0.0.1 331\n";
assert!(parse_windows_route_print_default(s).is_none());
}
/// `windows_apply_plan` with `default = Vpn`:
/// 1) `netsh ... add route 0.0.0.0/0 "Aura" <gw> store=active`
/// 2) `route ADD <direct_cidr> MASK <mask> <gw> METRIC 1`
/// 3) `route ADD <direct_host>/32 MASK 255.255.255.255 <gw> METRIC 1`
#[test]
fn windows_plan_default_vpn() {
let split = SplitRoutes {
default: DefaultAction::Vpn,
direct_cidrs: vec!["192.168.0.0/16".parse().unwrap()],
direct_hosts: vec!["1.2.3.4".parse().unwrap()],
..Default::default()
};
let plan = windows_apply_plan("Aura", &split, "10.0.0.1".parse().unwrap());
assert_eq!(plan.len(), 3);
// (1) VPN default via netsh.
assert_eq!(plan[0].prog, "netsh");
assert!(plan[0].args.contains(&"0.0.0.0/0".to_string()));
assert!(plan[0].args.contains(&"\"Aura\"".to_string()));
assert!(plan[0].args.contains(&"store=active".to_string()));
// (2) DIRECT CIDR via route ADD.
assert_eq!(plan[1].prog, "route");
assert_eq!(plan[1].args[0], "ADD");
assert!(plan[1].args.contains(&"192.168.0.0".to_string()));
assert!(plan[1].args.contains(&"255.255.0.0".to_string()));
assert!(plan[1].args.contains(&"10.0.0.1".to_string()));
assert!(plan[1].args.contains(&"METRIC".to_string()));
assert!(plan[1].args.contains(&"1".to_string()));
// (3) DIRECT host via route ADD with /32 mask.
assert_eq!(plan[2].prog, "route");
assert!(plan[2].args.contains(&"1.2.3.4".to_string()));
assert!(plan[2].args.contains(&"255.255.255.255".to_string()));
}
/// `windows_apply_plan` with `default = Direct`: no default override, only `netsh ... add
/// route <vpn_cidr> "Aura" ...` per entry.
#[test]
fn windows_plan_default_direct() {
let split = SplitRoutes {
default: DefaultAction::Direct,
vpn_cidrs: vec!["10.7.0.0/24".parse().unwrap()],
vpn_hosts: vec!["10.7.0.5".parse().unwrap()],
..Default::default()
};
let plan = windows_apply_plan("Aura", &split, "10.7.0.1".parse().unwrap());
assert_eq!(plan.len(), 2);
// No default override in this branch.
assert!(!plan.iter().any(|c| c.args.contains(&"0.0.0.0/0".into())));
// Every entry is a netsh add route through the wintun adapter.
for cmd in &plan {
assert_eq!(cmd.prog, "netsh");
assert!(cmd.args.contains(&"\"Aura\"".to_string()));
assert!(cmd.args.contains(&"add".to_string()));
assert!(cmd.args.contains(&"route".to_string()));
}
// The host route uses /32.
assert!(plan
.iter()
.any(|c| c.args.contains(&"10.7.0.5/32".to_string())));
}
/// `windows_undo_for` flips `route ADD` to `route DELETE` and drops the gateway/metric tail.
#[test]
fn windows_undo_route_add_to_delete() {
let apply = PlannedCommand::new(
"route",
vec![
"ADD".into(),
"192.168.0.0".into(),
"MASK".into(),
"255.255.0.0".into(),
"10.0.0.1".into(),
"METRIC".into(),
"1".into(),
],
);
// Manually call the same logic the windows_undo_for would (we can't `cfg(windows)`-gate
// a test on macOS, so reproduce the transform via a local helper).
let undo = windows_undo_for_test(&apply);
assert_eq!(undo.prog, "route");
assert_eq!(undo.args[0], "DELETE");
assert!(undo.args.contains(&"192.168.0.0".to_string()));
assert!(undo.args.contains(&"MASK".to_string()));
assert!(undo.args.contains(&"255.255.0.0".to_string()));
// Gateway and METRIC are intentionally trimmed for the delete form.
assert!(!undo.args.contains(&"10.0.0.1".to_string()));
assert!(!undo.args.contains(&"METRIC".to_string()));
}
/// `windows_undo_for` flips `netsh ... add route ...` to `netsh ... delete route ...` and
/// drops the next-hop / store=active tail.
#[test]
fn windows_undo_netsh_add_to_delete() {
let apply = PlannedCommand::new(
"netsh",
vec![
"interface".into(),
"ipv4".into(),
"add".into(),
"route".into(),
"10.7.0.0/24".into(),
"\"Aura\"".into(),
"10.7.0.1".into(),
"store=active".into(),
],
);
let undo = windows_undo_for_test(&apply);
assert_eq!(undo.prog, "netsh");
assert_eq!(undo.args[2], "delete");
assert_eq!(undo.args[4], "10.7.0.0/24");
assert_eq!(undo.args[5], "\"Aura\"");
// 6 args max after trim — no next-hop / store=active in the delete form.
assert_eq!(undo.args.len(), 6);
}
/// Local copy of the Windows undo logic for cross-platform tests. The production function
/// is `cfg(target_os = "windows")`-gated so it does not get compiled on macOS / Linux, but
/// the logic is pure-functional and we exercise it here byte-for-byte to keep coverage on
/// developer hosts (the docs explicitly state the dry-run tests must work everywhere).
fn windows_undo_for_test(applied: &PlannedCommand) -> PlannedCommand {
match applied.prog {
"route" => {
let mut args: Vec<String> = vec!["DELETE".into()];
if let Some(net) = applied.args.get(1) {
args.push(net.clone());
}
if applied.args.get(2).map(String::as_str) == Some("MASK") {
args.push("MASK".into());
if let Some(mask) = applied.args.get(3) {
args.push(mask.clone());
}
}
PlannedCommand::new("route", args)
}
"netsh" => {
let mut args = applied.args.clone();
if let Some(slot) = args.get_mut(2) {
if slot == "add" {
*slot = "delete".to_string();
}
}
args.truncate(6);
PlannedCommand::new("netsh", args)
}
other => {
let _ = other;
applied.clone()
}
}
}
} }
crates/aura-cli/tests/os_routes.rs
+27
View File
@@ -150,3 +150,30 @@ fn os_routes_section_default_values() {
assert!(d.gateway.is_none()); assert!(d.gateway.is_none());
assert!(d.egress_iface.is_none()); assert!(d.egress_iface.is_none());
} }
/// v3.3: a Windows-style client.toml (with the operator's pre-detected gateway already pinned
/// in `[tunnel.os_routes]`) still parses and the dry-run install renders the windows plan in
/// the logs. We do not assert on the log contents here — that is covered by the inner
/// `windows_plan_default_vpn` unit test in `os_routes.rs` — but we *do* verify that the API
/// surface accepts the same hints on every host (no Windows-only fields).
#[test]
fn dry_run_install_windows_style_overrides_succeed_anywhere() {
let split = SplitRoutes {
default: DefaultAction::Vpn,
direct_cidrs: vec!["192.168.0.0/16".parse().unwrap()],
vpn_cidrs: Vec::new(),
direct_hosts: vec!["1.2.3.4".parse().unwrap()],
vpn_hosts: Vec::new(),
};
// On Windows the "egress" hint is the upstream interface IP, not its display name.
// The dry-run path renders this verbatim into the windows plan.
let guard = OsRouteGuard::install(
"Aura",
&split,
Some("192.168.1.1"),
Some("192.168.1.42"),
/* dry_run */ true,
)
.expect("dry_run with Windows-style overrides must succeed on every host");
drop(guard);
}
crates/aura-tunnel/src/tun.rs
+50 -4
View File
@@ -37,8 +37,16 @@ pub struct AuraTun {
#[cfg(not(windows))] #[cfg(not(windows))]
mtu: u16, mtu: u16,
/// Active wintun session. `Session::Drop` ends the session via `WintunEndSession`.
#[cfg(windows)] #[cfg(windows)]
inner: std::sync::Arc<wintun::Session>, inner: std::sync::Arc<wintun::Session>,
/// Keep the wintun adapter alive for the lifetime of the session. `wintun::Session` only
/// holds an `Arc<Wintun>` (the DLL handle), NOT an `Arc<Adapter>` — if the adapter is
/// dropped, its `WintunCloseAdapter` runs and the session's underlying handle is
/// invalidated. Holding the `Arc<Adapter>` here is what guarantees the adapter outlives
/// the session.
#[cfg(windows)]
_adapter: std::sync::Arc<wintun::Adapter>,
#[cfg(windows)] #[cfg(windows)]
mtu: u16, mtu: u16,
} }
@@ -141,8 +149,14 @@ impl AuraTun {
IpAddr::V6(_) => unreachable!("v4 address yields a v4 mask"), IpAddr::V6(_) => unreachable!("v4 address yields a v4 mask"),
}; };
// SAFETY: loads the bundled wintun.dll via its documented entry point. // SAFETY: loads the bundled wintun.dll (expected next to aura.exe). The wintun crate
// documents this `load()` call as the entry point for in-process driver loading; failure
// here usually means wintun.dll is not on the PATH / app directory.
let wintun = unsafe { wintun::load() }.context("failed to load wintun.dll")?; let wintun = unsafe { wintun::load() }.context("failed to load wintun.dll")?;
// Adapter name is the display name used by Windows (also what `netsh ... "Aura"`
// references in [`crate::os_routes::windows_apply_plan`]). "Aura" doubles as the
// tunnel-type string — wintun groups adapters by tunnel_type, so all aura sessions
// appear under one category in Device Manager.
let adapter = wintun::Adapter::create(&wintun, name, "Aura", None) let adapter = wintun::Adapter::create(&wintun, name, "Aura", None)
.with_context(|| format!("failed to create wintun adapter '{name}'"))?; .with_context(|| format!("failed to create wintun adapter '{name}'"))?;
adapter adapter
@@ -156,26 +170,58 @@ impl AuraTun {
.start_session(wintun::MAX_RING_CAPACITY) .start_session(wintun::MAX_RING_CAPACITY)
.context("failed to start wintun session")?; .context("failed to start wintun session")?;
// Hold both the Arc<Adapter> and the Session: Session::Drop calls WintunEndSession, then
// Adapter::Drop calls WintunCloseAdapter — that ordering matches what the wintun crate
// docs prescribe (end the session before closing the adapter handle). Struct fields are
// dropped in declaration order, so `inner` (Session) drops first, then `_adapter`.
Ok(Self { Ok(Self {
inner: std::sync::Arc::new(session), inner: std::sync::Arc::new(session),
_adapter: adapter,
mtu, mtu,
}) })
} }
/// Read one IP packet from the wintun session. /// Read one IP packet from the wintun session.
/// ///
/// `receive_blocking` is a blocking call, so it runs on a blocking thread to avoid stalling the /// `receive_blocking` is a blocking call (it parks on the wintun ring's read event), so it
/// async runtime. /// runs on a blocking thread to avoid stalling the tokio runtime. The returned `Packet` owns
/// a slice into the ring buffer; we copy it out to a `Vec` because the ring slot is freed on
/// `Packet::Drop` (the next read overwrites it). MTU is checked only as a sanity bound — the
/// wintun ring itself is fixed at 64 KiB, but receiving anything larger than the negotiated
/// MTU means the OS is doing something wrong upstream.
#[cfg(windows)] #[cfg(windows)]
pub async fn read_packet(&mut self) -> anyhow::Result<Vec<u8>> { pub async fn read_packet(&mut self) -> anyhow::Result<Vec<u8>> {
let session = self.inner.clone(); let session = self.inner.clone();
let packet = tokio::task::spawn_blocking(move || session.receive_blocking()).await??; let packet = tokio::task::spawn_blocking(move || session.receive_blocking()).await??;
Ok(packet.bytes().to_vec()) let bytes = packet.bytes();
if bytes.len() > self.mtu as usize {
tracing::warn!(
target: "aura::tun",
len = bytes.len(),
mtu = self.mtu,
"wintun packet larger than configured MTU; forwarding anyway"
);
}
Ok(bytes.to_vec())
} }
/// Write one IP packet to the wintun session. /// Write one IP packet to the wintun session.
///
/// `allocate_send_packet` reserves a slot in the send ring; we fill it with `bytes_mut()`
/// then `send_packet` hands the slot back to the driver for transmission. The size cast to
/// `u16` is the wintun-imposed per-packet limit (the API takes `u16`, mirroring an
/// ETHERNET-class frame). Packets larger than [`Self::mtu`] are rejected up front so the
/// allocation does not even happen — that matches the Unix `tun` crate's behaviour where
/// `write` rejects oversized frames at the syscall layer.
#[cfg(windows)] #[cfg(windows)]
pub async fn write_packet(&mut self, packet: &[u8]) -> anyhow::Result<()> { pub async fn write_packet(&mut self, packet: &[u8]) -> anyhow::Result<()> {
if packet.len() > self.mtu as usize {
anyhow::bail!(
"outbound packet ({} bytes) exceeds wintun MTU ({})",
packet.len(),
self.mtu
);
}
let len: u16 = packet let len: u16 = packet
.len() .len()
.try_into() .try_into()
docs/deployment.md
+188 -4
View File
@@ -426,12 +426,27 @@ aura status
слой QUIC и TCP использует настоящий CA-trusted сертификат вместо self-signed Aura cert; слой QUIC и TCP использует настоящий CA-trusted сертификат вместо self-signed Aura cert;
внутренний Aura mutual-auth handshake продолжает аутентификацию против Aura CA. внутренний Aura mutual-auth handshake продолжает аутентификацию против Aura CA.
### v3.3 — Windows-as-client стал first-class
- ✓ **Windows OS-маршруты реализованы.** `[tunnel.os_routes] enabled = true` теперь работает
на Windows: `route ADD <net> MASK <mask> <gw> METRIC 1` для DIRECT-обходов, `netsh interface
ipv4 add route <prefix> "Aura" <tun_local_ip> store=active` для VPN-маршрутов через wintun-
адаптер. Дефолт-GW автодетектится через `route print 0`. Rollback подменяет `ADD`→`DELETE` и
`add`→`delete` на обоих путях. Подробности и пошаговый запуск — в §8.
- ✓ **wintun audit.** Найден и устранён баг: `Arc<wintun::Adapter>` больше не дропается раньше
`Session` (поле `_adapter` в `AuraTun` держит адаптер живым на всё время сессии).
- ✓ **Cross-compile.** Весь workspace проверен под `cargo check --target
x86_64-pc-windows-gnu` без warnings.
### Остающиеся честные ограничения ### Остающиеся честные ограничения
- **TUN всё ещё требует root** для **создания** интерфейса (это OS-уровень). Privilege drop - **TUN всё ещё требует root / Администратор** для **создания** интерфейса (это OS-уровень). На
минимизирует окно работы под root, но саму операцию обойти нельзя. Linux/macOS privilege drop минимизирует окно работы под root; на Windows аналога нет — клиент
- **IPv6 в OS-маршрутах и iptables MASQUERADE** не реализован — только IPv4 (план v3.3). работает от Администратора до выхода (warning в логе).
- **Windows OS-маршруты** — заглушка с лог-warning (план v3.3). Windows admin pipe **работает**. - **IPv6 в OS-маршрутах и iptables MASQUERADE** не реализован — только IPv4 (план v3.4).
- **Windows-as-server не первоклассный.** `[server.nat]` (IP-форвардинг + MASQUERADE) на
Windows не реализован; роль сервера / relay лучше держать на Linux/macOS. Windows клиент
работает с любым сервером.
- **Нативного Go-клиента для телефона нет** — через sing-box (Option B нативный Go-outbound, - **Нативного Go-клиента для телефона нет** — через sing-box (Option B нативный Go-outbound,
по `protocol.md` + KAT из Rust, см. [`sing-box.md`](sing-box.md)). Сейчас доступен только по `protocol.md` + KAT из Rust, см. [`sing-box.md`](sing-box.md)). Сейчас доступен только
десктоп-клиент / process-bridge. Это явно исключённый из v2 пункт. десктоп-клиент / process-bridge. Это явно исключённый из v2 пункт.
@@ -679,3 +694,172 @@ exit, и они не пересекаются (см. `aura provision-client --ci
Перевыпускать сертификаты двух хопов не нужно — они остаются те же, меняется только wire-адрес Перевыпускать сертификаты двух хопов не нужно — они остаются те же, меняется только wire-адрес
entry-узла. На сертификате entry-сервера должен быть SAN, совпадающий с `[client] sni` entry-узла. На сертификате entry-сервера должен быть SAN, совпадающий с `[client] sni`
(см. `aura pki issue-server --domain relay.example.ru`). (см. `aura pki issue-server --domain relay.example.ru`).
---
## 8. Windows как клиент
Windows-клиент стал first-class в v3.3. Сервер на Windows не поддерживается на уровне
автонастройки сети — `[server.nat]` (IP-форвардинг + MASQUERADE) реализован только для
Linux/macOS. Эта секция — про **клиент**.
### 8.1. Требования
- Windows 10 / 11 (или Server 2019+) с правами **Администратора** для процесса `aura.exe` —
поднятие wintun-адаптера и программирование таблицы маршрутов требуют привилегий.
- **wintun.dll** рядом с `aura.exe`. Скачать с официального сайта
[https://www.wintun.net/](https://www.wintun.net/) (драйвер от автора WireGuard);
распаковать `wintun/bin/amd64/wintun.dll` в каталог `aura.exe`.
### 8.2. Сборка / получение бинаря
Если у вас есть Rust toolchain на Windows — `cargo build --release` соберёт `target\release\aura.exe`.
С macOS / Linux можно собрать кросс-компиляцией (нужен mingw-w64):
```bash
rustup target add x86_64-pc-windows-gnu
# (на macOS) brew install mingw-w64
cargo build --release --target x86_64-pc-windows-gnu
# -> target/x86_64-pc-windows-gnu/release/aura.exe
```
### 8.3. PKI и провижининг
Команды `aura.exe pki ...` и `aura.exe provision-client ...` работают идентично Unix-версии
(см. §2.2). Бандл для клиента — те же три PEM-файла (`ca.crt`, `client.crt`, `client.key`)
плюс `client.toml`. PowerShell-форма:
```powershell
.\aura.exe pki init --ca-name "Aura Root CA" --out C:\ProgramData\Aura\pki
.\aura.exe pki issue-server --domain vpn.example.com --out C:\ProgramData\Aura\pki\server `
--ca C:\ProgramData\Aura\pki
.\aura.exe provision-client --id laptop-1 --out C:\Users\me\.aura
```
### 8.4. `client.toml` на Windows
Раскладка идентична §4.1. Имя TUN — это **отображаемое имя wintun-адаптера**: указанное в
`tun_name` имя становится `Display Name` адаптера в Device Manager (а также используется в
командах `netsh interface ipv4 add route ... "Aura"` — см. §8.5).
```toml
[client]
name = "laptop"
server_addr = "203.0.113.10:443"
sni = "vpn.example.com"
# run_as на Windows — no-op (нет аналога setresuid; warning в логе).
[pki]
ca_cert = "C:\\Users\\me\\.aura\\ca.crt"
cert = "C:\\Users\\me\\.aura\\client.crt"
key = "C:\\Users\\me\\.aura\\client.key"
[tunnel]
tun_name = "Aura" # имя wintun-адаптера; то же имя используется в netsh-командах ниже
local_ip = "10.7.0.2"
prefix = 24
mtu = 1420
[tunnel.split]
default = "VPN"
[[tunnel.split.direct]]
cidr = "192.168.0.0/16"
# v3.3: OS-уровень kill-switch теперь работает на Windows.
[tunnel.os_routes]
enabled = true
# Опционально: pin gateway + interface IP (читается `route print 0` если не задано).
# gateway = "192.168.1.1"
# egress_iface = "192.168.1.42"
[transport]
order = ["udp", "tcp", "quic"]
udp_port = 443
tcp_port = 443
quic_port = 444
```
### 8.5. Что делает `[tunnel.os_routes]` на Windows
На Linux/macOS клиент программирует системную таблицу маршрутов через `ip` / `route`. На
Windows — через `route ADD` (для DIRECT-обходов через исходный default-GW) и `netsh interface
ipv4 add route` (для VPN-маршрутов через wintun-адаптер).
**Auto-detect default GW:** клиент выполняет `route print 0` и парсит row `0.0.0.0 0.0.0.0
<gw> <interface_ip> <metric>` из IPv4 Active Routes. Если автодетект не сработал (например,
у машины несколько NIC и нет default'а в IPv4-таблице) — задайте `gateway` и `egress_iface`
явно в `[tunnel.os_routes]`. На Windows `egress_iface` — это **IP** upstream-интерфейса
(не имя), как в колонке `Interface` в `route print`.
**Что реально выполняется** (с пулом DIRECT `192.168.0.0/16` и default = VPN):
```
netsh interface ipv4 add route 0.0.0.0/0 "Aura" 10.7.0.2 store=active
route ADD 192.168.0.0 MASK 255.255.0.0 192.168.1.1 METRIC 1
```
**Что выполняется при выходе клиента** (Drop порядка LIFO):
```
route DELETE 192.168.0.0 MASK 255.255.0.0
netsh interface ipv4 delete route 0.0.0.0/0 "Aura"
```
`store=active` указывает Windows не сохранять маршрут в персистентном store — он привязан к
TUN, который исчезает на выходе клиента. Параметр `METRIC 1` обеспечивает приоритет
DIRECT-обхода над любыми существующими маршрутами с большей метрикой.
### 8.6. Запуск
PowerShell как Администратор:
```powershell
cd C:\Aura
.\aura.exe client --config .\client.toml
```
В логе при успехе:
```
INFO connected and authenticated to server peer=Some("vpn.example.com") mode=udp
INFO OS-level split-tunnel routes installed (DIRECT traffic now bypasses the TUN)
INFO running: netsh interface ipv4 add route 0.0.0.0/0 "Aura" 10.7.0.2 store=active
INFO running: route ADD 192.168.0.0 MASK 255.255.0.0 192.168.1.1 METRIC 1
```
Прервать через `Ctrl+C` — выводящийся guard корректно вызывает `route DELETE` / `netsh ...
delete route` и затем закрывает wintun-сессию + адаптер (см. §8.7).
### 8.7. Cleanup на Windows (что происходит при остановке клиента)
Порядок dropping:
1. **OsRouteGuard::drop** — выполняет rollback-команды в LIFO-порядке (`route DELETE ...`,
затем `netsh ... delete route ...`). Ошибки логируются warn-ом, дальнейший rollback
продолжается — один сбойный шаг не остановит зачистку остальных маршрутов.
2. **wintun::Session::drop** — `WintunEndSession` завершает сессию (закрывает ring buffer).
3. **wintun::Adapter::drop** — `WintunCloseAdapter` снимает адаптер с системы. Drop порядка
полей в `AuraTun` гарантирует, что Session завершается до Adapter (поле `inner` объявлено
раньше `_adapter`).
Если процесс упал без graceful shutdown (kill -9 / BSOD): wintun-адаптер останется
зарегистрированным в системе, и при следующем запуске `Adapter::create` найдёт его по имени и
переиспользует. Орфанных системных маршрутов в персистентном store не будет — все наши
маршруты идут через `store=active`, которые система очищает на reboot.
### 8.8. Известные ограничения Windows-клиента
- **`run_as`** на Windows — no-op. Аналога `setresuid` для безпрепятственного drop'а к
service-account во время работы нет; рекомендация — запустить `aura.exe` как Windows
Service от выделенной учётной записи (см. документацию `sc.exe create`), либо просто из
PowerShell-сессии Администратора.
- **`[server.nat]`** на Windows не реализован — Windows-as-server не первоклассный сценарий.
Используйте Linux/macOS для роли сервера / relay.
- **IPv6 routes** программируются через `netsh interface ipv6 add route` для VPN, но IPv6
DIRECT-обходы попадают в тот же `netsh ipv6` путь (а не в IPv4-only `route ADD`). Для
чистой IPv4-only установки это не имеет значения.
- **Mixed-mode** (часть транспортов в одну сеть, часть в другую) на Windows не тестировался
глубоко — `netsh ... store=active` маршруты могут конфликтовать с существующими VPN-
клиентами (WireGuard, OpenVPN) если те уже захватили default-route. Отключите конкурирующие
VPN перед запуском aura-клиента.