Avery Pennarun 85e675940d wgengine/filter: allow ICMP response packets. ...

Longer term, we should probably update the packet filter to be fully
stateful, for both TCP and ICMP. That is, only ICMP packets related to
a session *we* initiated should be allowed back in. But this is
reasonably secure for now, since wireguard is already trimming most
traffic. The current code would not protect against eg. Ping-of-Death style
attacks from VPN nodes.

Fixes tailscale/tailscale#290.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>

2020-04-29 05:25:45 -04:00

..

packet.go

wgengine/filter: allow ICMP response packets.

2020-04-29 05:25:45 -04:00