tool · inferred from evidence
MARK
An extension in ip6tables referenced in the error message.
- Tailscale health check ip6tables exit status 2 Extension MARK revision 0 not supported Linux 6.11
`tailscale status` shows a health warning on Linux 6.11.4/6.11.5 and 6.6.57/6.6.58: adding [-i tailscale0 -j MARK --set-mark 0x40000/0xff0000] in v6/filter/ts-forward: running ip6tables ... exit status 2: Warning: Extension MARK revision 0