It could be related to the issues #180 & #216. I noticed that on Mac OS 12.5, MacBook Pro M1 non-privileged pings do not work on remote IPs (pinging local loopback interfaces works fine).
While I can see correct ICMP requests & responses with tcpdump, ping discards responses because they include unexpected IP headers.
SuperQ
commented
1 year ago
It could be related to the issues #180 & #216. I noticed that on Mac OS 12.5, MacBook Pro M1 non-privileged pings do not work on remote IPs (pinging local loopback interfaces works fine). While I can see correct ICMP requests & responses with tcpdump, ping discards responses because they include unexpected IP headers.
It looks like STRIPHDR socket option is not working as expected on some darwin setups: https://go.googlesource.com/net/+/master/icmp/listen_posix.go#75.
The workaround fixes the issue on Mac & doesn't break working loopback pings, but it wasn't tested on Windows or linux.