https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263974
--- Comment #2 from Jim B. <j...@jimby.name> --- I replaced the FreeBSD 13.0-p11 firewall with an instance of the BSDP Router Project running on Qemu. BSDRP Platform: FreeBSD router.bsdrp.net 14.0-CURRENT FreeBSD 14.0-CURRENT BSDRP-AMD64 amd64 The architecture and ruleset were unchanged. The nat64lsn instance works correctly and the communication is successful. sysctl net.inet.ip.fw.nat64_direct_output=0 is required for the ruleset shown. It seems that the problem is narrowed to ipfw_nat64 13.0 code. I will check again with FreeBSD 13.1 when it drops. Jim B. -- You are receiving this mail because: You are the assignee for the bug.