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When reverse path filtering is in strict mode on Linux, using an exit node blocks all network connectivity. This change adds a warning about this to `tailscale status` and the logs. Example in `tailscale status`: ``` - not connected to home DERP region 22 - The following issues on your machine will likely make usage of exit nodes impossible: [interface "eth0" has strict reverse-path filtering enabled], please set rp_filter=2 instead of rp_filter=1; see https://github.com/tailscale/tailscale/issues/3310 ``` Example in the logs: ``` 2024/02/21 21:17:07 health("overall"): error: multiple errors: not in map poll The following issues on your machine will likely make usage of exit nodes impossible: [interface "eth0" has strict reverse-path filtering enabled], please set rp_filter=2 instead of rp_filter=1; see https://github.com/tailscale/tailscale/issues/3310 ``` Updates #3310 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
16 lines
727 B
Go
16 lines
727 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package healthmsg contains some constants for health messages.
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//
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// It's a leaf so both the server and CLI can depend on it without bringing too
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// much in to the CLI binary.
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package healthmsg
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const (
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WarnAcceptRoutesOff = "Some peers are advertising routes but --accept-routes is false"
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TailscaleSSHOnBut = "Tailscale SSH enabled, but " // + ... something from caller
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LockedOut = "this node is locked out; it will not have connectivity until it is signed. For more info, see https://tailscale.com/s/locked-out"
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WarnExitNodeUsage = "The following issues on your machine will likely make usage of exit nodes impossible"
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)
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