> > looks like sshd is trying to read /home/ouruser/.ssh/authorized_keys and > is stuck. Can you read this file from the command line? Is it e.g. on > NFS which might not be properly mounted? > > Does it work if you skip pubkey authentication > > ssh -o PubkeyAuthentication=no -vv -k ouruser@ourserver > > bye, > Sumit >
Thanks for the suggestion. What happens is the NIS password works. The FreeIPA password, which I update with: ipa user-mod ouruser --setattr "userpassword=xxxx", fails with the below errors/logs Feb 9 11:10:34 ourserver sshd[381563]: debug1: Forked child 536086. Feb 9 11:10:34 ourserver sshd[536086]: debug1: Set /proc/self/oom_score_adj to 0 Feb 9 11:10:34 ourserver sshd[536086]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8 Feb 9 11:10:34 ourserver sshd[536086]: debug1: inetd sockets after dupping: 4, 4 Feb 9 11:10:34 ourserver sshd[536086]: Connection from x.x.x.x port 53332 on 150.108.64.156 port 22 rdomain "" Feb 9 11:10:34 ourserver sshd[536086]: debug1: Local version string SSH-2.0-OpenSSH_8.4 Feb 9 11:10:34 ourserver sshd[536086]: debug1: Remote protocol version 2.0, remote software version OpenSSH_8.4 Feb 9 11:10:34 ourserver sshd[536086]: debug1: match: OpenSSH_8.4 pat OpenSSH* compat 0x04000000 Feb 9 11:10:35 ourserver sshd[536086]: debug1: SELinux support disabled [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: permanently_set_uid: 74/74 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: list_hostkey_types: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_KEXINIT sent [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_KEXINIT received [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: algorithm: curve25519-sha256 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: rekey out after 4294967296 blocks [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_NEWKEYS sent [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: Sending SSH2_MSG_EXT_INFO [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: expecting SSH2_MSG_NEWKEYS [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_NEWKEYS received [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: rekey in after 4294967296 blocks [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: KEX done [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: attempt 0 failures 0 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: initializing for "ouruser" Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: setting PAM_RHOST to "x.x.x.x" Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: setting PAM_TTY to "ssh" Feb 9 11:10:35 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method keyboard-interactive [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: attempt 1 failures 0 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: keyboard-interactive devs [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: auth2_challenge: user=ouruser devs= [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kbdint_alloc: devices 'pam' [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: auth2_challenge_start: trying authentication method 'pam' [preauth] Feb 9 11:10:35 ourserver sshd[536086]: Postponed keyboard-interactive for ouruser from x.x.x.x port 53332 ssh2 [preauth] Feb 9 11:10:39 ourserver sshd[536091]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=x.x.x.x user=ouruser Feb 9 11:10:39 ourserver sshd[536091]: pam_sss(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=x.x.x.x user=ouruser Feb 9 11:10:39 ourserver sshd[536091]: pam_sss(sshd:auth): received for user ouruser: 9 (Authentication service cannot retrieve authentication info) Feb 9 11:10:41 ourserver sshd[536086]: error: PAM: Authentication failure for ouruser from x.x.x.x Feb 9 11:10:41 ourserver sshd[536086]: Failed keyboard-interactive/pam for ouruser from x.x.x.x port 53332 ssh2 Feb 9 11:10:41 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method keyboard-interactive [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: attempt 2 failures 1 [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: keyboard-interactive devs [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: auth2_challenge: user=ouruser devs= [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: kbdint_alloc: devices 'pam' [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: auth2_challenge_start: trying authentication method 'pam' [preauth] Feb 9 11:10:41 ourserver sshd[536086]: Postponed keyboard-interactive for ouruser from x.x.x.x port 53332 ssh2 [preauth] Feb 9 11:10:34 ourserver sshd[381563]: debug1: Forked child 536086. Feb 9 11:10:34 ourserver sshd[536086]: debug1: Set /proc/self/oom_score_adj to 0 Feb 9 11:10:34 ourserver sshd[536086]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8 Feb 9 11:10:34 ourserver sshd[536086]: debug1: inetd sockets after dupping: 4, 4 Feb 9 11:10:34 ourserver sshd[536086]: Connection from x.x.x.x port 53332 on 150.108.64.156 port 22 rdomain "" Feb 9 11:10:34 ourserver sshd[536086]: debug1: Local version string SSH-2.0-OpenSSH_8.4 Feb 9 11:10:34 ourserver sshd[536086]: debug1: Remote protocol version 2.0, remote software version OpenSSH_8.4 Feb 9 11:10:34 ourserver sshd[536086]: debug1: match: OpenSSH_8.4 pat OpenSSH* compat 0x04000000 Feb 9 11:10:35 ourserver sshd[536086]: debug1: SELinux support disabled [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: permanently_set_uid: 74/74 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: list_hostkey_types: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_KEXINIT sent [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_KEXINIT received [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: algorithm: curve25519-sha256 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: rekey out after 4294967296 blocks [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_NEWKEYS sent [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: Sending SSH2_MSG_EXT_INFO [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: expecting SSH2_MSG_NEWKEYS [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: SSH2_MSG_NEWKEYS received [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: rekey in after 4294967296 blocks [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: KEX done [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method none [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: attempt 0 failures 0 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: initializing for "ouruser" Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: setting PAM_RHOST to "x.x.x.x" Feb 9 11:10:35 ourserver sshd[536086]: debug1: PAM: setting PAM_TTY to "ssh" Feb 9 11:10:35 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method keyboard-interactive [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: attempt 1 failures 0 [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: keyboard-interactive devs [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: auth2_challenge: user=ouruser devs= [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: kbdint_alloc: devices 'pam' [preauth] Feb 9 11:10:35 ourserver sshd[536086]: debug1: auth2_challenge_start: trying authentication method 'pam' [preauth] Feb 9 11:10:35 ourserver sshd[536086]: Postponed keyboard-interactive for ouruser from x.x.x.x port 53332 ssh2 [preauth] Feb 9 11:10:39 ourserver sshd[536091]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=x.x.x.x user=ouruser Feb 9 11:10:39 ourserver sshd[536091]: pam_sss(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=x.x.x.x user=ouruser Feb 9 11:10:39 ourserver sshd[536091]: pam_sss(sshd:auth): received for user ouruser: 9 (Authentication service cannot retrieve authentication info) Feb 9 11:10:41 ourserver sshd[536086]: error: PAM: Authentication failure for ouruser from x.x.x.x Feb 9 11:10:41 ourserver sshd[536086]: Failed keyboard-interactive/pam for ouruser from x.x.x.x port 53332 ssh2 Feb 9 11:10:41 ourserver sshd[536086]: debug1: userauth-request for user ouruser service ssh-connection method keyboard-interactive [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: attempt 2 failures 1 [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: keyboard-interactive devs [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: auth2_challenge: user=ouruser devs= [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: kbdint_alloc: devices 'pam' [preauth] Feb 9 11:10:41 ourserver sshd[536086]: debug1: auth2_challenge_start: trying authentication method 'pam' [preauth] Feb 9 11:10:41 ourserver sshd[536086]: Postponed keyboard-interactive for ouruser from x.x.x.x port 53332 ssh2 [preauth] With the NIS password the logs show this: Feb 9 11:16:57 debug1: do_pam_account: called Feb 9 11:16:57 ourserver sshd[536226]: debug1: PAM: num PAM env strings 2 Feb 9 11:16:57 ourserver sshd[536226]: Postponed keyboard-interactive/pam for cai from 150.108.68.26 port 53646 ssh2 [preauth] Feb 9 11:16:57 ourserver sshd[536226]: debug1: do_pam_account: called Feb 9 11:16:57 ourserver sshd[536226]: Accepted keyboard-interactive/pam for cai from 150.108.68.26 port 53646 ssh2 Feb 9 11:16:57 ourserver sshd[536226]: debug1: monitor_child_preauth: cai has been authenticated by privileged process Feb 9 11:16:57 ourserver sshd[536226]: debug1: monitor_read_log: child log fd closed Feb 9 11:16:57 ourserver sshd[536226]: debug1: audit_event: unhandled event 2 Feb 9 11:16:57 ourserver sshd[536226]: debug1: temporarily_use_uid: 5879/200 (e=0/0) Feb 9 11:16:57 ourserver sshd[536226]: debug1: ssh_gssapi_storecreds: Not a GSSAPI mechanism Feb 9 11:16:57 ourserver sshd[536226]: debug1: restore_uid: 0/0 Feb 9 11:16:57 ourserver sshd[536226]: debug1: SELinux support disabled Feb 9 11:16:57 ourserver sshd[536226]: debug1: PAM: establishing credentials Feb 9 11:16:57 ourserver systemd[536237]: pam_unix(systemd-user:session): session opened for user cai(uid=5879) by (uid=0) What options should be set in /etc/ssh/sshd_config? Is sssd necessary for this to work with the FreeIPA password?
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