Public bug reported:
After upgrading from 22.04 to 24.04 I noticed that my sshd only
listening on IPv6 interface (::), while previously it was listening both
IPv4 (0.0.0.0) and IPv6 (::). I tried to explicitly specify
ListenAddress 0.0.0.0 (assuming it would bind to IPv4 only) but after
restart sshd was still listening on IPv6 only.
This problem affects other packages as well, for example, openvpn.
Rebuilding applications from sources seems to fix the issue.
Setting net.ipv6.bindv6only=0 also helps, but that's not a solution.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: openssh-server 1:9.6p1-3ubuntu13.5
ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
Uname: Linux 6.8.0-41-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Tue Sep 10 16:45:54 2024
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=screen.xterm-256color
SourcePackage: openssh
UpgradeStatus: Upgraded to noble on 2024-09-10 (0 days ago)
** Affects: openssh (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
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https://bugs.launchpad.net/bugs/2080216
Title:
sshd cannot bind to IPv4 interfaces
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