Public bug reported: With IpV6 enabled everything works well. However if you disable ipv6 by editing /etc/default/grub with the following entry GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1" then when you ping there is an initial socket error
ping localhost ping: socket: Address family not supported by protocol PING localhost (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.046 ms 64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.038 ms 64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.028 ms 64 bytes from localhost (127.0.0.1): icmp_seq=4 ttl=64 time=0.028 ms however ping -4 works ping -4 localhost PING localhost (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.032 ms 64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.029 ms 64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.021 ms so it looks like ping is trying ipv6 first and not detecting that its disabled. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: iputils-ping 3:20210202-1build1 ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14 Uname: Linux 5.13.0-19-generic x86_64 ApportVersion: 2.20.11-0ubuntu74 Architecture: amd64 CasperMD5CheckResult: pass Date: Mon Jan 3 17:42:07 2022 InstallationDate: Installed on 2022-01-03 (0 days ago) InstallationMedia: Ubuntu-Server 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211029) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: iputils UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: iputils (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug jammy third-party-packages uec-images -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1956243 Title: Ping give socket error initially if IPv6 is disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iputils/+bug/1956243/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs