Follow below steps to Enable SSH Verbose Logging Debug In SSHD_CONFIG Config File.
1. Take backup of /etc/ssh/sshd_config file
2. Update /etc/ssh/sshd_config file and change below line LogLevel value to DEBUG3.
LogLevel DEBUG3
3. Restart the sshd service
service sshd restart
4. Check the /var/log/secure file if the Debug output is printed
You would see debug output printed as follows:
User SSH Login debug snippet
May 14 19:42:37 test-control sshd[2242]: debug3: fd 5 is not O_NONBLOCK
May 14 19:42:37 test-control sshd[2242]: debug1: Forked child 20856.
May 14 19:42:37 test-control sshd[2242]: debug3: send_rexec_state: entering fd = 8 config len 756
May 14 19:42:37 test-control sshd[2242]: debug3: ssh_msg_send: type 0
May 14 19:42:37 test-control sshd[2242]: debug3: send_rexec_state: done
May 14 19:42:37 test-control sshd[20856]: debug3: oom_adjust_restore
May 14 19:42:37 test-control sshd[20856]: debug1: Set /proc/self/oom_score_adj to 0
May 14 19:42:37 test-control sshd[20856]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
May 14 19:42:37 test-control sshd[20856]: debug1: inetd sockets after dupping: 4, 4
May 14 19:42:37 test-control sshd[20856]: Connection from 10.XX.XX.97 port 32886 on 10.XX.XX.56 port 22
May 14 19:42:37 test-control sshd[20856]: debug1: Local version string SSH-2.0-OpenSSH_8.0
May 14 19:42:37 test-control sshd[20856]: debug1: Remote protocol version 2.0, remote software version OpenSSH_8.0
May 14 19:42:37 test-control sshd[20856]: debug1: match: OpenSSH_8.0 pat OpenSSH* compat 0x04000000
May 14 19:42:37 test-control sshd[20856]: debug2: fd 4 setting O_NONBLOCK
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_sandbox_init: preparing seccomp filter sandbox
May 14 19:42:37 test-control sshd[20856]: debug2: Network child is on pid 20857
May 14 19:42:37 test-control sshd[20856]: debug3: preauth child monitor started
May 14 19:42:37 test-control sshd[20856]: debug1: SELinux support enabled [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: ssh_selinux_change_context: setting context from 'system_u:system_r:sshd_t:s0-s0:c0.c1023' to 'system_u:system_r:sshd_net_t:s0-s0:c0.c1023' [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: privsep user:group 74:74 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: permanently_set_uid: 74/74 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_sandbox_child: setting PR_SET_NO_NEW_PRIVS [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_sandbox_child: attaching seccomp filter program [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: list_hostkey_types: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 20 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: SSH2_MSG_KEXINIT sent [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 20 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: SSH2_MSG_KEXINIT received [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: local server KEXINIT proposal [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,kex-strict-s-v00@openssh.com [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: ciphers ctos: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes256-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: ciphers stoc: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes256-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: MACs ctos: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: MACs stoc: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: compression ctos: none,zlib@openssh.com [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: compression stoc: none,zlib@openssh.com [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: languages ctos: [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: languages stoc: [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: first_kex_follows 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: reserved 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: peer client KEXINIT proposal [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c,kex-strict-c-v00@openssh.com [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: ciphers ctos: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes256-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: ciphers stoc: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes256-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: MACs ctos: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: MACs stoc: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: compression ctos: none,zlib@openssh.com,zlib [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: compression stoc: none,zlib@openssh.com,zlib [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: languages ctos: [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: languages stoc: [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: first_kex_follows 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: reserved 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: will use strict KEX ordering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: kex: algorithm: curve25519-sha256 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: kex: client->server cipher: aes256-gcm@openssh.com MAC: <implicit> compression: none [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: kex: server->client cipher: aes256-gcm@openssh.com MAC: <implicit> compression: none [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 120 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 121 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 120
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 121
May 14 19:42:37 test-control sshd[20856]: debug1: kex: curve25519-sha256 need=32 dh_need=32 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 120 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 121 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 120
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 121
May 14 19:42:37 test-control sshd[20856]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 30 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_sshkey_sign entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 6 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_sshkey_sign: waiting for MONITOR_ANS_SIGN [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 7 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 6
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_sign
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_sign: hostkey proof signature 0x5563082bf1bXX.XX00)
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 7
May 14 19:42:37 test-control sshd[20856]: debug2: monitor_read: 6 used once, disabling now
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 31 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 21 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: resetting send seqnr 3 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: set_newkeys: mode 1 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: rekey out after 4294967296 blocks [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 7 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 21 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: resetting read seqnr 3 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: SSH2_MSG_NEWKEYS received [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: set_newkeys: mode 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: rekey in after 4294967296 blocks [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: KEX done [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 5 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 6 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 50 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: userauth-request for user opc service ssh-connection method none [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: attempt 0 failures 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_getpwnamallow entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 8 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 9 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 8
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_pwnamallow
May 14 19:42:37 test-control sshd[20856]: debug2: parse_server_config_depth: config reprocess config len 756
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 9
May 14 19:42:37 test-control sshd[20856]: debug2: monitor_read: 8 used once, disabling now
May 14 19:42:37 test-control sshd[20856]: debug2: input_userauth_request: setting up authctxt for opc [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_start_pam entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 100 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_inform_authserv entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 4 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_inform_authrole entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 80 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: input_userauth_request: try method none [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: user_specific_delay: user specific delay 0.000ms [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: ensure_minimum_time_since: elapsed 0.698ms, delaying 5.511ms (requested 6.209ms) [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 100
May 14 19:42:37 test-control sshd[20856]: debug1: PAM: initializing for "opc"
May 14 19:42:37 test-control sshd[20856]: debug1: PAM: setting PAM_RHOST to "10.XX.XX.97"
May 14 19:42:37 test-control sshd[20856]: debug1: PAM: setting PAM_TTY to "ssh"
May 14 19:42:37 test-control sshd[20856]: debug2: monitor_read: 100 used once, disabling now
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 4
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_authserv: service=ssh-connection, style=
May 14 19:42:37 test-control sshd[20856]: debug2: monitor_read: 4 used once, disabling now
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 80
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_authrole: role=
May 14 19:42:37 test-control sshd[20856]: debug2: monitor_read: 80 used once, disabling now
May 14 19:42:37 test-control sshd[20856]: debug3: userauth_finish: failure partial=0 next methods="publickey" [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 51 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 50 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: userauth-request for user opc service ssh-connection method publickey [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: attempt 1 failures 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: input_userauth_request: try method publickey [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: userauth_pubkey: valid user opc querying public key rsa-sha2-256 AAAAB3NzaC1yc2EAAAADAQABAAABgQC+YaTNG/EJfasGBl1ZGFpjBiP8ZgSeYYqVRm4DBDJMPuGhXVY0CHD9Anbp/rSnICSH/wWYZbjaTpMm+OqFqWbJkgdNXTwpx+1nzRCVxzGwVHavtWyhIuCMdVLepk1dNxug/GzFkABdEMOG3DOW9hpbQNb7WN0EgvIgX91uVmjuadtAsVlFRRnXYxrrObeAKmrkxmYciLYY/yXfnAKCEiX9o4k6JXkeLVnrW18BNU1BYcMP7b5PCuKkKp1euxHB+dZ96xCBSZ7XiL9Z34kssf72ATi37KoTFYPlFEeRwEZM5korHvEvHJE21rKpeCbM6SNrp/apqgBnDmRz0/Egj4+Z2DRT3Vk+P9H8bzHqdOjjmIDa3hLApT10kFcxFo87Ldm342PgQoqGZOQ
May 14 19:42:37 test-control sshd[20856]: debug1: userauth_pubkey: test pkalg rsa-sha2-256 pkblob RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_key_allowed entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 22 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 23 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 22
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed entering
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed: key_from_blob: 0x5563082c7900
May 14 19:42:37 test-control sshd[20856]: debug1: temporarily_use_uid: 100XX.XX000 (e=0/0)
May 14 19:42:37 test-control sshd[20856]: debug1: trying public key file /home/opc/.ssh/authorized_keys
May 14 19:42:37 test-control sshd[20856]: debug1: fd 5 clearing O_NONBLOCK
May 14 19:42:37 test-control sshd[20856]: debug1: /home/opc/.ssh/authorized_keys:2: matching key found: RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk
May 14 19:42:37 test-control sshd[20856]: debug1: /home/opc/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
May 14 19:42:37 test-control sshd[20856]: Accepted key RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk found at /home/opc/.ssh/authorized_keys:2
May 14 19:42:37 test-control sshd[20856]: debug1: restore_uid: 0/0
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed: publickey authentication test: RSA key is allowed
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 23
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 60 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: userauth_pubkey: authenticated 0 pkalg rsa-sha2-256 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: user_specific_delay: user specific delay 0.000ms [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: ensure_minimum_time_since: elapsed 1.636ms, delaying 4.573ms (requested 6.209ms) [preauth]
May 14 19:42:37 test-control sshd[20856]: Postponed publickey for opc from 10.XX.XX.97 port 32886 ssh2 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: receive packet: type 50 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: userauth-request for user opc service ssh-connection method publickey [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: attempt 2 failures 0 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: input_userauth_request: try method publickey [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: userauth_pubkey: valid user opc attempting public key rsa-sha2-256 AAAAB3NzaC1yc2EAAAADAQABAAABgQC+YaTNG/EJfasGBl1ZGFpjBiP8ZgSeYYqVRm4DBDJMPuGhXVY0CHD9Anbp/rSnICSH/wWYZbjaTpMm+OqFqWbJkgdNXTwpx+1nzRCVxzGwVHavtWyhIuCMdVLepk1dNxug/GzFkABdEMOG3DOW9hpbQNb7WN0EgvIgX91uVmjuadtAsVlFRRnXYxrrObeAKmrkxmYciLYY/yXfnAKCEiX9o4k6JXkeLVnrW18BNU1BYcMP7b5PCuKkKp1euxHB+dZ96xCBSZ7XiL9Z34kssf72ATi37KoTFYPlFEeRwEZM5korHvEvHJE21rKpeCbM6SNrp/apqgBnDmRz0/Egj4+Z2DRT3Vk+P9H8bzHqdOjjmIDa3hLApT10kFcxFo87Ldm342PgQoqGZ
May 14 19:42:37 test-control sshd[20856]: debug3: userauth_pubkey: have rsa-sha2-256 signature for RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_key_allowed entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 22 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 23 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 22
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed entering
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed: key_from_blob: 0x5563082c7900
May 14 19:42:37 test-control sshd[20856]: debug1: temporarily_use_uid: 100XX.XX000 (e=0/0)
May 14 19:42:37 test-control sshd[20856]: debug1: trying public key file /home/opc/.ssh/authorized_keys
May 14 19:42:37 test-control sshd[20856]: debug1: fd 5 clearing O_NONBLOCK
May 14 19:42:37 test-control sshd[20856]: debug1: /home/opc/.ssh/authorized_keys:2: matching key found: RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk
May 14 19:42:37 test-control sshd[20856]: debug1: /home/opc/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
May 14 19:42:37 test-control sshd[20856]: Accepted key RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk found at /home/opc/.ssh/authorized_keys:2
May 14 19:42:37 test-control sshd[20856]: debug1: restore_uid: 0/0
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyallowed: publickey authentication: RSA key is allowed
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 23
May 14 19:42:37 test-control sshd[20856]: debug3: mm_sshkey_verify entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 24 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_sshkey_verify: waiting for MONITOR_ANS_KEYVERIFY [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 25 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 24
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_keyverify: publickey 0x5563082c7900 signature verified
May 14 19:42:37 test-control sshd[20856]: debug1: auth_activate_options: setting new authentication options
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 25
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 102
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug1: do_pam_account: called
May 14 19:42:37 test-control sshd[20856]: debug2: do_pam_account: auth information in SSH_AUTH_INFO_0
May 14 19:42:37 test-control sshd[20856]: debug3: PAM: do_pam_account pam_acct_mgmt = 0 (Success)
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 103
May 14 19:42:37 test-control sshd[20856]: Accepted publickey for opc from 10.XX.XX.97 port 32886 ssh2: RSA SHA256:rYNPNkXetXyfE/muyA2LF5Xx/5Y4AeAb7ZaTJciNFLk
May 14 19:42:37 test-control sshd[20856]: debug1: monitor_child_preauth: opc has been authenticated by privileged process
May 14 19:42:37 test-control sshd[20856]: debug3: mm_get_keystate: Waiting for new keys
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 26
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: mm_get_keystate: GOT new keys
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 122
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 123
May 14 19:42:37 test-control sshd[20856]: debug1: auth_activate_options: setting new authentication options [preauth]
May 14 19:42:37 test-control sshd[20856]: debug2: userauth_pubkey: authenticated 1 pkalg rsa-sha2-256 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: user_specific_delay: user specific delay 0.000ms [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: ensure_minimum_time_since: elapsed 0.602ms, delaying 5.607ms (requested 6.209ms) [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_do_pam_account entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 102 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 103 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_do_pam_account returning 1 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: send packet: type 52 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 26 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_send_keystate: Finished sending state [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 122 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive_expect entering: type 123 [preauth]
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering [preauth]
May 14 19:42:37 test-control sshd[20856]: debug1: monitor_read_log: child log fd closed
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_sandbox_parent_finish: finished
May 14 19:42:37 test-control sshd[20856]: debug1: audit_event: unhandled event 2
May 14 19:42:37 test-control sshd[20856]: debug1: SELinux support enabled
May 14 19:42:37 test-control sshd[20856]: debug3: sshd_selinux_setup_variables: setting execution context
May 14 19:42:37 test-control sshd[20856]: debug1: PAM: establishing credentials
May 14 19:42:37 test-control sshd[20856]: debug3: PAM: opening session
May 14 19:42:37 test-control sshd[20856]: debug2: do_pam_session: auth information in SSH_AUTH_INFO_0
May 14 19:42:37 test-control sshd[20856]: debug3: PAM: sshpam_store_conv called with 1 messages
May 14 19:42:37 test-control sshd[20856]: pam_unix(sshd:session): session opened for user opc by (uid=0)
May 14 19:42:37 test-control sshd[20856]: User child is on pid 20859
May 14 19:42:37 test-control sshd[20859]: debug1: PAM: establishing credentials
May 14 19:42:37 test-control sshd[20859]: debug3: sshd_selinux_setup_variables: setting execution context
May 14 19:42:37 test-control sshd[20859]: debug1: permanently_set_uid: 100XX.XX000
May 14 19:42:37 test-control sshd[20859]: debug3: monitor_apply_keystate: packet_set_state
May 14 19:42:37 test-control sshd[20859]: debug2: set_newkeys: mode 0
May 14 19:42:37 test-control sshd[20859]: debug1: rekey in after 4294967296 blocks
May 14 19:42:37 test-control sshd[20859]: debug2: set_newkeys: mode 1
May 14 19:42:37 test-control sshd[20859]: debug1: rekey out after 4294967296 blocks
May 14 19:42:37 test-control sshd[20859]: debug1: ssh_packet_set_postauth: called
May 14 19:42:37 test-control sshd[20859]: debug3: ssh_packet_set_state: done
May 14 19:42:37 test-control sshd[20859]: debug3: notify_hostkeys: key 0: ssh-rsa SHA256:Xgi83LKm30hQvhhTpo8G9GgFtPNxR/3g3QwpM+iqits
May 14 19:42:37 test-control sshd[20859]: debug3: notify_hostkeys: key 1: ecdsa-sha2-nistp256 SHA256:9+PjCj4876KuBJ/sUEjqIyKxzqM+4RPlD9LJGbMWZTM
May 14 19:42:37 test-control sshd[20859]: debug3: notify_hostkeys: key 2: ssh-ed25519 SHA256:ecjJkh330QLowPmmMeV1CQcr0kkSDUfhSnoeSu7besA
May 14 19:42:37 test-control sshd[20859]: debug3: notify_hostkeys: sent 3 hostkeys
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 80
May 14 19:42:37 test-control sshd[20859]: debug1: active: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
May 14 19:42:37 test-control sshd[20859]: debug3: sending debug message: /home/opc/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 4
May 14 19:42:37 test-control sshd[20859]: debug3: sending debug message: /home/opc/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 4
May 14 19:42:37 test-control sshd[20859]: debug1: Entering interactive session for SSH2.
May 14 19:42:37 test-control sshd[20859]: debug2: fd 3 setting O_NONBLOCK
May 14 19:42:37 test-control sshd[20859]: debug2: fd 8 setting O_NONBLOCK
May 14 19:42:37 test-control sshd[20859]: debug1: server_init_dispatch
May 14 19:42:37 test-control sshd[20859]: debug3: receive packet: type 90
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_channel_open: ctype session rchan 0 win 1048576 max 16384
May 14 19:42:37 test-control sshd[20859]: debug1: input_session_request
May 14 19:42:37 test-control sshd[20859]: debug1: channel 0: new [server-session]
May 14 19:42:37 test-control sshd[20859]: debug2: session_new: allocate (allocated 0 max 10)
May 14 19:42:37 test-control sshd[20859]: debug3: session_unused: session id 0 unused
May 14 19:42:37 test-control sshd[20859]: debug1: session_new: session 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_open: channel 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_open: session 0: link with channel 0
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_channel_open: confirm session
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 91
May 14 19:42:37 test-control sshd[20859]: debug3: receive packet: type 80
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_global_request: rtype no-more-sessions@openssh.com want_reply 0
May 14 19:42:37 test-control sshd[20859]: debug3: receive packet: type 98
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_channel_req: channel 0 request pty-req reply 1
May 14 19:42:37 test-control sshd[20859]: debug1: session_by_channel: session 0 channel 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_input_channel_req: session 0 req pty-req
May 14 19:42:37 test-control sshd[20859]: debug1: Allocating pty.
May 14 19:42:37 test-control sshd[20859]: debug3: mm_request_send entering: type 28
May 14 19:42:37 test-control sshd[20859]: debug3: mm_pty_allocate: waiting for MONITOR_ANS_PTY
May 14 19:42:37 test-control sshd[20859]: debug3: mm_request_receive_expect entering: type 29
May 14 19:42:37 test-control sshd[20859]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 28
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_pty entering
May 14 19:42:37 test-control sshd[20856]: debug2: session_new: allocate (allocated 0 max 10)
May 14 19:42:37 test-control sshd[20856]: debug3: session_unused: session id 0 unused
May 14 19:42:37 test-control sshd[20856]: debug1: session_new: session 0
May 14 19:42:37 test-control sshd[20856]: debug1: SELinux support enabled
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_selinux_setup_pty: setting TTY context on /dev/pts/1
May 14 19:42:37 test-control sshd[20856]: debug3: ssh_selinux_setup_pty: done
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_send entering: type 29
May 14 19:42:37 test-control sshd[20856]: debug3: mm_answer_pty: tty /dev/pts/1 ptyfd 3
May 14 19:42:37 test-control sshd[20859]: debug1: session_pty_req: session 0 alloc /dev/pts/1
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 99
May 14 19:42:37 test-control sshd[20859]: debug3: receive packet: type 98
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_channel_req: channel 0 request env reply 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_by_channel: session 0 channel 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_input_channel_req: session 0 req env
May 14 19:42:37 test-control sshd[20859]: debug2: Setting env 0: LANG=en_US.UTF-8
May 14 19:42:37 test-control sshd[20859]: debug3: receive packet: type 98
May 14 19:42:37 test-control sshd[20859]: debug1: server_input_channel_req: channel 0 request shell reply 1
May 14 19:42:37 test-control sshd[20859]: debug1: session_by_channel: session 0 channel 0
May 14 19:42:37 test-control sshd[20859]: debug1: session_input_channel_req: session 0 req shell
May 14 19:42:37 test-control sshd[20859]: Starting session: shell on pts/1 for opc from 10.XX.XX.97 port 32886 id 0
May 14 19:42:37 test-control sshd[20859]: debug2: fd 4 setting TCP_NODELAY
May 14 19:42:37 test-control sshd[20859]: debug3: ssh_packet_set_tos: set IP_TOS 0x48
May 14 19:42:37 test-control sshd[20859]: debug2: channel 0: rfd 13 isatty
May 14 19:42:37 test-control sshd[20859]: debug2: fd 13 setting O_NONBLOCK
May 14 19:42:37 test-control sshd[20859]: debug3: fd 9 is O_NONBLOCK
May 14 19:42:37 test-control sshd[20859]: debug3: mm_forward_audit_messages: entering
May 14 19:42:37 test-control sshd[20860]: debug1: Setting controlling tty using TIOCSCTTY.
May 14 19:42:37 test-control sshd[20860]: debug3: mm_request_send entering: type 124
May 14 19:42:37 test-control sshd[20859]: debug3: send packet: type 99
May 14 19:42:37 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:37 test-control sshd[20856]: debug3: monitor_read: checking request 124
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: SELINUX_ROLE_REQUESTED=
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: SELINUX_LEVEL_REQUESTED=
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: SELINUX_USE_CURRENT_RANGE=
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: XDG_SESSION_ID=39
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: XDG_RUNTIME_DIR=/run/user/1000
May 14 19:42:37 test-control sshd[20860]: debug3: Copy environment: DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
May 14 19:42:38 test-control sshd[3844]: debug2: channel 0: rcvd adjust 57119
User Logout debug snippet
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: read<=0 rfd 13 len -1
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: read failed
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: chan_shutdown_read (i0 o0 sock -1 wfd 13 efd -1 [closed])
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: input open -> drain
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: ibuf empty
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: send eof
May 14 19:42:52 test-control sshd[20859]: debug3: send packet: type 96
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: input drain -> closed
May 14 19:42:52 test-control sshd[20859]: debug2: notify_done: reading
May 14 19:42:52 test-control sshd[20859]: debug1: Received SIGCHLD.
May 14 19:42:52 test-control sshd[20859]: debug1: session_by_pid: pid 20860
May 14 19:42:52 test-control sshd[20859]: debug1: session_exit_message: session 0 channel 0 pid 20860
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: request exit-status confirm 0
May 14 19:42:52 test-control sshd[20859]: debug3: send packet: type 98
May 14 19:42:52 test-control sshd[20859]: debug1: session_exit_message: release channel 0
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: write failed
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: chan_shutdown_write (i3 o0 sock -1 wfd 9 efd -1 [closed])
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: send eow
May 14 19:42:52 test-control sshd[20859]: debug3: send packet: type 98
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: output open -> closed
May 14 19:42:52 test-control sshd[20859]: debug3: mm_request_send entering: type 30
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: send close
May 14 19:42:52 test-control sshd[20859]: debug3: send packet: type 97
May 14 19:42:52 test-control sshd[20859]: debug3: channel 0: will not send data after close
May 14 19:42:52 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:52 test-control sshd[20856]: debug3: monitor_read: checking request 30
May 14 19:42:52 test-control sshd[20856]: debug3: mm_answer_pty_cleanup entering
May 14 19:42:52 test-control sshd[20856]: debug1: session_by_tty: session 0 tty /dev/pts/1
May 14 19:42:52 test-control sshd[20856]: debug3: mm_session_close: session 0 pid 20859
May 14 19:42:52 test-control sshd[20856]: debug3: mm_session_close: tty /dev/pts/1 ptyfd 3
May 14 19:42:52 test-control sshd[20856]: debug1: session_pty_cleanup2: session 0 release /dev/pts/1
May 14 19:42:52 test-control sshd[20859]: debug3: receive packet: type 97
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: rcvd close
May 14 19:42:52 test-control sshd[20859]: debug3: channel 0: will not send data after close
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: is dead
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: gc: notify user
May 14 19:42:52 test-control sshd[20859]: debug1: session_by_channel: session 0 channel 0
May 14 19:42:52 test-control sshd[20859]: debug1: session_close_by_channel: channel 0 child 0
May 14 19:42:52 test-control sshd[20859]: Close session: user opc from 10.XX.XX.97 port 32886 id 0
May 14 19:42:52 test-control sshd[20859]: debug3: session_unused: session id 0 unused
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: gc: user detached
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: is dead
May 14 19:42:52 test-control sshd[20859]: debug2: channel 0: garbage collecting
May 14 19:42:52 test-control sshd[20859]: debug1: channel 0: free: server-session, nchannels 1
May 14 19:42:52 test-control sshd[20859]: debug3: channel 0: status: The following connections are open:\r\n #0 server-session (t4 r0 i3/0 o3/0 e[closed]/0 fd -1/-1/-1 sock -1 cc -1)\r\n
May 14 19:42:52 test-control sshd[20859]: debug3: receive packet: type 1
May 14 19:42:52 test-control sshd[20859]: Received disconnect from 10.XX.XX.97 port 32886:11: disconnected by user
May 14 19:42:52 test-control sshd[20859]: debug3: mm_request_send entering: type 122
May 14 19:42:52 test-control sshd[20859]: debug3: mm_request_receive_expect entering: type 123
May 14 19:42:52 test-control sshd[20859]: debug3: mm_request_receive entering
May 14 19:42:52 test-control sshd[20856]: debug3: session_unused: session id 0 unused
May 14 19:42:52 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:52 test-control sshd[20856]: debug3: monitor_read: checking request 122
May 14 19:42:52 test-control sshd[20856]: debug3: mm_request_send entering: type 123
May 14 19:42:52 test-control sshd[20859]: Disconnected from user opc 10.XX.XX.97 port 32886
May 14 19:42:52 test-control sshd[20859]: debug1: do_cleanup
May 14 19:42:52 test-control sshd[20859]: debug3: PAM: sshpam_thread_cleanup entering
May 14 19:42:52 test-control sshd[20859]: debug3: mm_request_send entering: type 124
May 14 19:42:52 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:52 test-control sshd[20856]: debug3: monitor_read: checking request 124
May 14 19:42:52 test-control sshd[20856]: debug3: mm_request_receive entering
May 14 19:42:52 test-control sshd[20856]: debug1: do_cleanup
May 14 19:42:52 test-control sshd[20856]: debug1: PAM: cleanup
May 14 19:42:52 test-control sshd[20856]: debug1: PAM: closing session
May 14 19:42:52 test-control sshd[20856]: pam_unix(sshd:session): session closed for user opc
May 14 19:42:52 test-control sshd[20856]: debug1: PAM: deleting credentials
May 14 19:42:52 test-control sshd[20856]: debug3: PAM: sshpam_thread_cleanup entering
