AFAIK build time: sshkey.h:49:#define SSH_RSA_MINIMUM_MODULUS_SIZE 1024
And those short keys are really considered insecure, which is the reason they went from deprecated to no more accepted. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756031 Title: openssh-server doesn't accept aes256-cbc key To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1756031/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs