Hello, I'd like to use only PAM(for requiring additional restrictions) for OpenSSH authentications and I'd like to have: *key authentications *s/key like authentications but more secure(because I was told that the randomness of the s/key passwords is not secure nowadays) (and additional things such as anti-brute-force system for PAM and logins restrictions based on the time/date) but I haven't been successful so far... I first wanted to forbid others account than the ones listed in /etc/ssh/sshd.allow: I've done the following in /etc/ssh/sshd_config I've used PAM: UsePAM yes normal passwords were disabled,key enabled and s/key disabled and I added: auth required pam_listfile.so item=user sense=allow file=/etc/ssh/sshd.allow onerr=fail to /etc/pam.d/ssh but it didn't work...account not listed in the file could still login via SSH then I removed the key authentication in /etc/ssh/sshd_config and then when login via SSH I was asked a password...and entering a password from an account that was in the file didn't work but adding auth required pam_listfile.so item=user sense=allow file=/etc/ssh/sshd.allow onerr=fail to /etc/pam.d/login prevent non-listed users from login in and according to theses logs sshd uses pam: # /usr/sbin/sshd -f /etc/ssh/sshd_config -d debug1: sshd version OpenSSH_5.1p1 debug1: read PEM private key done: type RSA debug1: private host key: #0 type 1 RSA debug1: read PEM private key done: type DSA debug1: private host key: #1 type 2 DSA debug1: rexec_argv[0]='/usr/sbin/sshd' debug1: rexec_argv[1]='-f' debug1: rexec_argv[2]='/etc/ssh/sshd_config' debug1: rexec_argv[3]='-d' debug1: Bind to port 443 on ::. Server listening on :: port 443. debug1: Bind to port 443 on 0.0.0.0. Server listening on 0.0.0.0 port 443. debug1: Bind to port 223 on ::. Server listening on :: port 223. debug1: Bind to port 223 on 0.0.0.0. Server listening on 0.0.0.0 port 223. debug1: Server will not fork when running in debugging mode. debug1: rexec start in 7 out 7 newsock 7 pipe -1 sock 10 debug1: inetd sockets after dupping: 3, 3 Connection from 127.0.0.1 port 39216 debug1: Client protocol version 2.0; client software version OpenSSH_5.1 debug1: match: OpenSSH_5.1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.1 debug1: permanently_set_uid: 22/22 debug1: list_hostkey_types: ssh-rsa,ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: client->server aes128-cbc hmac-md5 none debug1: kex: server->client aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user xxx service ssh-connection method none debug1: attempt 0 failures 0 debug1: userauth-request for user xxx service ssh-connection method publickey debug1: attempt 1 failures 0 debug1: test whether pkalg/pkblob are acceptable debug1: PAM: initializing for "xxx" debug1: PAM: setting PAM_RHOST to "localhost" debug1: PAM: setting PAM_TTY to "ssh" debug1: temporarily_use_uid: 1008/1020 (e=0/0) debug1: trying public key file /home/xxx/.ssh/authorized_keys debug1: fd 4 clearing O_NONBLOCK debug1: matching key found: file /home/xxx/.ssh/authorized_keys, line 1 Found matching RSA key: 26:f1:81:ae:13:2f:3d:31:bd:96:1d:62:01:96:62:de debug1: restore_uid: 0/0 Postponed publickey for xxx from 127.0.0.1 port 39216 ssh2 debug1: userauth-request for user xxx service ssh-connection method publickey debug1: attempt 2 failures 0 debug1: temporarily_use_uid: 1008/1020 (e=0/0) debug1: trying public key file /home/xxx/.ssh/authorized_keys debug1: fd 4 clearing O_NONBLOCK debug1: matching key found: file /home/xxx/.ssh/authorized_keys, line 1 Found matching RSA key: 26:f1:81:ae:13:2f:3d:31:bd:96:1d:62:01:96:62:de debug1: restore_uid: 0/0 debug1: ssh_rsa_verify: signature correct debug1: do_pam_account: called Accepted publickey for xxx from 127.0.0.1 port 39216 ssh2 debug1: monitor_child_preauth: xxx has been authenticated by privileged process debug1: PAM: establishing credentials debug1: PAM: establishing credentials debug1: permanently_set_uid: 1008/1020 debug1: Entering interactive session for SSH2. debug1: server_init_dispatch_20 debug1: server_input_channel_open: ctype session rchan 0 win 1048576 max 16384 debug1: input_session_request debug1: channel 0: new [server-session] debug1: session_new: session 0 debug1: session_open: channel 0 debug1: session_open: session 0: link with channel 0 debug1: server_input_channel_open: confirm session debug1: server_input_global_request: rtype no-more-sessions@xxxxxxxxxxx want_reply 0 debug1: server_input_channel_req: channel 0 request pty-req reply 1 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req pty-req debug1: Allocating pty. User child is on pid 30159 debug1: session_new: session 0 debug1: session_pty_req: session 0 alloc /dev/pts/7 debug1: server_input_channel_req: channel 0 request shell reply 1 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req shell debug1: Setting controlling tty using TIOCSCTTY. debug1: Received SIGCHLD. debug1: session_by_pid: pid 30160 debug1: session_exit_message: session 0 channel 0 pid 30160 debug1: session_exit_message: release channel 0 debug1: session_by_tty: session 0 tty /dev/pts/7 debug1: session_pty_cleanup: session 0 release /dev/pts/7 debug1: session_by_channel: session 0 channel 0 debug1: session_close_by_channel: channel 0 child 0 debug1: session_close: session 0 pid 0 debug1: channel 0: free: server-session, nchannels 1 Connection closed by 127.0.0.1 debug1: do_cleanup Transferred: sent 3016, received 2528 bytes Closing connection to 127.0.0.1 port 39216 debug1: PAM: cleanup debug1: PAM: deleting credentials debug1: PAM: closing session
