Hello, it seems I cannot use: $ ssh -J root@2a01:4f8:1c1e:528d::1 root@west-coast Invalid -J argument (The west-coast is stored on the jump host in between in /etc/hosts.) $ ssh -J root@167.235.141.44 root@west-coast Works as expected. Also $ ssh root@2a01:4f8:1c1e:528d::1 does work as expected. I do have native IPv6. This is on Debian 12 Bookworm: $ ssh -V OpenSSH_9.2p1 Debian-2+deb12u2, OpenSSL 3.0.11 19 Sep 2023 The workaround seems to be to define the host used in ProxyJump in ~/.ssh/config then it works with IPv6 too. Yes, I known I should use IPv6 with DNS which is not the point here. What have I overlooked? Thank you for any help. Adam Kalisz _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev