Hi Rob On 15 Oct 2019, at 10:22, Rob Crittenden <[email protected]<mailto:[email protected]>> wrote:
Vinícius Ferrão via FreeIPA-users wrote: Hello, I’m trying to implement SSH Hostbased Authentication between IPA joined machines but I’m with difficulties regarding: * The /etc/ssh/ssh_known_hosts file. In a FreeIPA environment the known_hosts are stored on IPA, and I’m aware of the ProxyCommand /usr/bin/sss_ssh_knownhostsproxy; but how can I create this file with the entries from FreeIPA? Why do you want to? That is the point of the proxy, so dynamic files don't need to be maintained. Because it appears to be a requirement. Unfortunately SSH does not look at /var/lib/sss/pubconf/known_hosts: debug1: userauth_hostbased: cuser admin chost hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br>. pkalg ecdsa-sha2-nistp256 slen 100 [preauth] debug3: mm_key_allowed entering [preauth] debug3: mm_request_send entering: type 22 [preauth] debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth] debug3: mm_request_receive_expect entering: type 23 [preauth] debug3: mm_request_receive entering [preauth] debug3: mm_request_receive entering debug3: monitor_read: checking request 22 debug3: mm_answer_keyallowed entering debug3: mm_answer_keyallowed: key_from_blob: 0x561842345040 debug2: hostbased_key_allowed: chost hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br>. resolvedname hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> ipaddr 172.26.0.1 debug2: stripping trailing dot from chost hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br>. debug2: auth_rhosts2: clientuser admin hostname hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> ipaddr 172.26.0.1 debug1: temporarily_use_uid: 1683000000/1683000000 (e=0/0) debug1: restore_uid: 0/0 debug1: fd 8 clearing O_NONBLOCK debug2: hostbased_key_allowed: access allowed by auth_rhosts2 debug1: temporarily_use_uid: 1683000000/1683000000 (e=0/0) debug1: restore_uid: 0/0 debug1: check_key_in_hostfiles: key for host hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> not found debug1: temporarily_use_uid: 1683000000/1683000000 (e=0/0) debug1: restore_uid: 0/0 debug1: check_key_in_hostfiles: key for host hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> not found debug3: mm_answer_keyallowed: key 0x561842345040 is not allowed Failed hostbased for admin from 172.26.0.1 port 55634 ssh2: ECDSA SHA256:wJ0OVmkiVnMjuoiRe5sdBVz5sMTTKIbYRWorTk+CnUQ, client user "admin", client host "hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br>” If you look at the sshd log there is this: debug1: check_key_in_hostfiles: key for host hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> not found But if I create the file manually it will work: debug1: check_key_in_hostfiles: key for hpclab01.cluster.iq.ufrj.br<http://hpclab01.cluster.iq.ufrj.br> found at /etc/ssh/ssh_known_hosts:1 Any ideias? * Another issue is with the /etc/ssh/shosts.equiv file. It supports plain hostnames or netgroups, which is a NIS thing. FreeIPA offers any netgroups compatibility? I’m expecting to put something like: @nodes on this file to keep it simple. Any changes on IPA hosts would be reflected automatically. IPA hostgroups are automatically mirrored as netgroups. Nice, this worked flawlessly!!! rob Thank you very much. V.
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