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tailscale/net/netcheck
James Tucker 9351eec3e1 net/netcheck: remove hairpin probes
Palo Alto reported interpreting hairpin probes as LAND attacks, and the
firewalls may be responding to this by shutting down otherwise in use NAT sessions
prematurely. We don't currently make use of the outcome of the hairpin
probes, and they contribute to other user confusion with e.g. the
AirPort Extreme hairpin session workaround. We decided in response to
remove the whole probe feature as a result.

Updates #188
Updates tailscale/corp#19106
Updates tailscale/corp#19116

Signed-off-by: James Tucker <james@tailscale.com>
6 months ago
..
netcheck.go net/netcheck: remove hairpin probes 6 months ago
netcheck_test.go net/netcheck: remove hairpin probes 6 months ago
standalone.go net/netns, net/dns/resolver, etc: make netmon required in most places 7 months ago