Date: Thu, 29 Jan 2026 16:49:21 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 292807] IPv6 loopback ::1 cannot respond to requests sourced from another interface address Message-ID: <bug-292807-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292807 Bug ID: 292807 Summary: IPv6 loopback ::1 cannot respond to requests sourced from another interface address Product: Base System Version: 16.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: mmendoza@netgate.com Sourcing an IPv6 request from an interface address not on loopback fails when the destination is ::1. In the following example both 10.0.5.1 and fc00::1 are assigned to ix0: $ ping -c 1 -S 10.0.5.1 127.0.0.1 PING 127.0.0.1 (127.0.0.1) from 10.0.5.1: 56 data bytes 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.358 ms --- 127.0.0.1 ping statistics --- 1 packets transmitted, 1 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 0.358/0.358/0.358/0.000 ms $ ping6 -c 1 -S fc00::1 ::1 PING(56=40+8+8 bytes) fc00::1 --> ::1 --- ::1 ping statistics --- 1 packets transmitted, 0 packets received, 100.0% packet loss -- You are receiving this mail because: You are the assignee for the bug.home | help
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