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Lyor Goldstein commented on SSHD-1118: -------------------------------------- Indeed, but please bear in mind that {{server-sig-alg}} is an SSH KEX +extension+ and not all clients support it. > Unable to connect with Fedora 33 which has dropped ssh-rsa from > PubkeyAcceptedKeyTypes > -------------------------------------------------------------------------------------- > > Key: SSHD-1118 > URL: https://issues.apache.org/jira/browse/SSHD-1118 > Project: MINA SSHD > Issue Type: Bug > Affects Versions: 2.4.0 > Reporter: Ian Wienand > Priority: Major > > This problem was noted with Gerrit using a 2.4.0 mina sshd server [1] after a > recent upgrade. Some users using Fedora 33 started being not able to log in. > It turns out that Fedora >=33 has dropped rsa-ssh from it's default > {{PubkeyAcceptedKeyTypes}} in > {{/etc/crypto-policies/back-ends/openssh.config}}. You either have to modify > your policy globally to "legacy" with "update-crypto-policies" or manually > set {{PubkeyAcceptedKeyTypes=ssh-rsa}} for failing servers. > I understand that {{server-sig-algs}} support isn't fully implemented in mina > sshd as yet, so the client will not be seeing the negotiation list. > However, it seems rsa-sha2-256/512 are supported? It seems like forcing this > with {{ssh -oPubkeyAcceptedKeyTypes=rsa-sha2-512}} should work, but it does > not (see related gerrit bug)? > I can provide ssh connect logs, etc. if it will help; at this point I think > it's mostly about understanding Fedora's change and any mina limitations so > we can find the best solution for users. Although Fedora 33 users are > obviously a small minority now, it probably flags something other distros > will take up sooner or later. > > Thanks! > > [1] [https://bugs.chromium.org/p/gerrit/issues/detail?id=13930] -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org