Eugene Crosser <crosser@xxxxxxxxxxx> wrote: > Is this a known situation? Which behavior is "correct"? No idea, your reproducer gives this on my laptop: unshare -n bash repro.sh net.ipv4.conf.veout.accept_local = 1 5.14.9-200.fc34.x86_64 conntrack v1.4.5 (conntrack-tools): connection tracking table has been emptied. PING 172.30.30.2 (172.30.30.2) from 172.30.30.1 vein: 56(84) bytes of data. --- 172.30.30.2 ping statistics --- 1 packets transmitted, 0 received, 100% packet loss, time 0ms conntrack v1.4.5 (conntrack-tools): 0 flow entries have been shown. A bisection is needed to figure out what introduced a change. However, if this is already changeed for a few releases then we can't revert it again.
