一个名为chcsouza的用户试图从service0主机访问service1主机，但收到消息：
连接closures了172.23.0.4
172.23.0.4是service1的IP
老用户可以ssh到这个主机。 新用户不能。
使用冗长，他得到了这个答复
chcsouza@service0:~$ ssh -vvv service1 OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to service1 [172.23.0.4] port 22. debug1: Connection established. debug1: identity file /home/chcsouza/.ssh/identity type 0 debug1: identity file /home/chcsouza/.ssh/identity-cert type -1 debug3: Not a RSA1 key file /home/chcsouza/.ssh/id_rsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/chcsouza/.ssh/id_rsa type 1 debug1: identity file /home/chcsouza/.ssh/id_rsa-cert type -1 debug3: Not a RSA1 key file /home/chcsouza/.ssh/id_dsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/chcsouza/.ssh/id_dsa type 2 debug1: identity file /home/chcsouza/.ssh/id_dsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug3: Wrote 960 bytes for a total of 981 debug1: SSH2_MSG_KEXINIT received debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug3: Wrote 24 bytes for a total of 1005 debug2: dh_gen_key: priv key bits set: 125/256 debug2: bits set: 496/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: Wrote 144 bytes for a total of 1149 debug3: check_host_in_hostfile: host service1 filename /home/chcsouza/.ssh/known_hosts debug3: check_host_in_hostfile: host service1 filename /home/chcsouza/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug3: check_host_in_hostfile: host 172.23.0.4 filename /home/chcsouza/.ssh/known_hosts debug3: check_host_in_hostfile: host 172.23.0.4 filename /home/chcsouza/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug1: Host 'service1' is known and matches the RSA host key. debug1: Found key in /home/chcsouza/.ssh/known_hosts:1 debug2: bits set: 530/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: Wrote 16 bytes for a total of 1165 debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug3: Wrote 48 bytes for a total of 1213 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/chcsouza/.ssh/id_rsa (0x7fff49076990) debug2: key: /home/chcsouza/.ssh/id_dsa (0x7fff490769c0) debug3: Wrote 64 bytes for a total of 1277 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup gssapi-keyex debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_is_enabled gssapi-keyex debug1: Next authentication method: gssapi-keyex debug1: No valid Key exchange context debug2: we did not send a packet, disable method debug3: authmethod_lookup gssapi-with-mic debug3: remaining preferred: publickey,keyboard-interactive,password debug3: authmethod_is_enabled gssapi-with-mic debug1: Next authentication method: gssapi-with-mic debug3: Trying to reverse map address 172.23.0.4. debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_1366' not found debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_1366' not found debug1: Unspecified GSS failure. Minor code may provide more information debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_1366' not found debug2: we did not send a packet, disable method debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering public key: /home/chcsouza/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug3: Wrote 368 bytes for a total of 1645 debug1: Server accepts key: pkalg ssh-rsa blen 277 debug2: input_userauth_pk_ok: SHA1 fp 5a:a4:42:e0:32:70:4e:2c:d8:20:c8:cf:73:d6:30:ad:79:58:6a:d0 debug3: sign_and_send_pubkey: RSA 5a:a4:42:e0:32:70:4e:2c:d8:20:c8:cf:73:d6:30:ad:79:58:6a:d0 debug1: read PEM private key done: type RSA debug3: Wrote 640 bytes for a total of 2285 Connection closed by 172.23.0.4 如果我们在sshd进程中启用debugging，服务器在用户chcsouza尝试通过sshlogin时显示这些消息：
root@service1:~# service sshd start Starting sshd: debug2: load_server_config: filename /etc/ssh/sshd_config ... debug1: userauth-request for user chcsouza service ssh-connection method none debug1: attempt 0 failures 0 debug3: mm_getpwnamallow entering debug3: mm_request_send entering: type 7 debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM debug3: mm_request_receive_expect entering: type 8 debug3: mm_request_receive entering debug3: monitor_read: checking request 7 debug3: mm_answer_pwnamallow debug3: Trying to reverse map address 172.23.0.3. debug2: parse_server_config: config reprocess config len 665 debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1 debug3: mm_request_send entering: type 8 debug2: monitor_read: 7 used once, disabling now debug3: mm_request_receive entering debug2: input_userauth_request: setting up authctxt for chcsouza debug3: mm_start_pam entering debug3: mm_request_send entering: type 50 debug3: mm_inform_authserv entering debug3: monitor_read: checking request 50 debug3: mm_request_send entering: type 3 debug1: PAM: initializing for "chcsouza" debug3: mm_inform_authrole entering debug3: mm_request_send entering: type 4 debug2: input_userauth_request: try method none debug3: Wrote 80 bytes for a total of 1861 debug1: PAM: setting PAM_RHOST to "service0.head.smc-default.imd.local" debug1: PAM: setting PAM_TTY to "ssh" debug2: monitor_read: 50 used once, disabling now debug3: mm_request_receive entering debug3: monitor_read: checking request 3 debug3: mm_answer_authserv: service=ssh-connection, style= debug2: monitor_read: 3 used once, disabling now debug3: mm_request_receive entering debug3: monitor_read: checking request 4 debug3: mm_answer_authrole: role= debug2: monitor_read: 4 used once, disabling now debug3: mm_request_receive entering debug1: userauth-request for user chcsouza service ssh-connection method publickey debug1: attempt 1 failures 0 debug2: input_userauth_request: try method publickey debug1: test whether pkalg/pkblob are acceptable debug3: mm_key_allowed entering debug3: mm_request_send entering: type 21 debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED debug3: mm_request_receive_expect entering: type 22 debug3: monitor_read: checking request 21 debug3: mm_request_receive entering debug3: mm_answer_keyallowed entering debug3: mm_answer_keyallowed: key_from_blob: 0x7fffedd2b700 debug1: temporarily_use_uid: 1366/613 (e=0/0) debug1: trying public key file /home/chcsouza/.ssh/authorized_keys debug1: fd 4 clearing O_NONBLOCK debug3: secure_filename: checking '/home/chcsouza/.ssh' debug3: secure_filename: checking '/home/chcsouza' debug3: secure_filename: terminating check at '/home/chcsouza' debug2: key_type_from_name: unknown key type '2048' debug3: key_read: missing keytype debug2: user_key_allowed: check options: '2048 35 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '35' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '35 chcsouza@service0 ' debug2: key not found debug1: restore_uid: 0/0 debug1: temporarily_use_uid: 1366/613 (e=0/0) debug1: trying public key file /home/chcsouza/.ssh/authorized_keys2 debug1: fd 4 clearing O_NONBLOCK debug3: secure_filename: checking '/home/chcsouza/.ssh' debug3: secure_filename: checking '/home/chcsouza' debug3: secure_filename: terminating check at '/home/chcsouza' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '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 chcsouza@service0 ' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '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 chcsouza@service0 ' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '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 chcsouza@service0 ' debug1: matching key found: file /home/chcsouza/.ssh/authorized_keys2, line 6 Found matching RSA key: 00:1a:4c:9c:2b:63:34:5d:db:fb:8d:33:da:52:06:0c debug1: restore_uid: 0/0 debug3: mm_answer_keyallowed: key 0x7fffedd2b700 is allowed debug3: mm_request_send entering: type 22 debug3: mm_request_receive entering debug3: Wrote 320 bytes for a total of 2181 debug2: userauth_pubkey: authenticated 0 pkalg ssh-rsa Postponed publickey for chcsouza from 172.23.0.3 port 42046 ssh2 debug1: userauth-request for user chcsouza service ssh-connection method publickey debug1: attempt 2 failures 0 debug2: input_userauth_request: try method publickey debug3: mm_key_allowed entering debug3: mm_request_send entering: type 21 debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED debug3: mm_request_receive_expect entering: type 22 debug3: mm_request_receive entering debug3: monitor_read: checking request 21 debug3: mm_answer_keyallowed entering debug3: mm_answer_keyallowed: key_from_blob: 0x7fffedd2b740 debug1: temporarily_use_uid: 1366/613 (e=0/0) debug1: trying public key file /home/chcsouza/.ssh/authorized_keys debug1: fd 4 clearing O_NONBLOCK debug3: secure_filename: checking '/home/chcsouza/.ssh' debug3: secure_filename: checking '/home/chcsouza' debug3: secure_filename: terminating check at '/home/chcsouza' debug2: key_type_from_name: unknown key type '2048' debug3: key_read: missing keytype debug2: user_key_allowed: check options: '2048 35 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '35' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '35 chcsouza@service0 ' debug2: key not found debug1: restore_uid: 0/0 debug1: temporarily_use_uid: 1366/613 (e=0/0) debug1: trying public key file /home/chcsouza/.ssh/authorized_keys2 debug1: fd 4 clearing O_NONBLOCK debug3: secure_filename: checking '/home/chcsouza/.ssh' debug3: secure_filename: checking '/home/chcsouza' debug3: secure_filename: terminating check at '/home/chcsouza' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: 'AAAAB3NzaC1kc3MAAACBAJuTygIgx4+mwww5WzDYrdESjWv6fTpFdnEqAK2weRUgm8NB7/4KoWvUywCi6lPui0IX3YlyTojhF+WDZr/YS1ZeOhGMXIAylKUn2V3SNscERbGKMbXxmkzZPlIRmOLRv7eCe/JgL/V9udnhqDqjL8q/9BcAUXb5bUTHKC5n9m5bAAAAFQDYEFE3nUqG2Xn66FL25LeapaO2hwAAAIAPTzwkNPqb9mKdR8KwrpGDLOx4Fme1FWJeXVg6XSGASkleaEWqSMSBO4WsjN+ZnlSsMvJ/IT8skVEUYPLLpQHQ4XWUl7HD/lF5VN5x1QtaDUgDLsWrwmLMH++R2/xw/3YfAXVVrQVdXXAl49DFioBaqvqaeXAVZ6UlE080pNtXHgAAAIBkjGzKjE1i0L8LrhUitkjyf6B4UhnGqm6RSubuOVoy0BByIMm8ze/f0KkRASkz/2hXoWur8R6G7nAyC+VGjo/yQt+WyN0oBqjOGJDTr4Lvm9EL5blm4OyF9sXo5u7Kj27J5kirwEtlrkxikipEp5BJuqYsvxzFnnCmBONNfC2+cw== chcsouza@service0 ' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '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 chcsouza@service0 ' debug3: key_read: type mismatch debug2: user_key_allowed: check options: 'ssh-dss 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 chcsouza@service0 ' debug2: key_type_from_name: unknown key type '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' debug3: key_read: missing keytype debug2: user_key_allowed: advance: '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 chcsouza@service0 ' debug1: matching key found: file /home/chcsouza/.ssh/authorized_keys2, line 6 Found matching RSA key: 00:1a:4c:9c:2b:63:34:5d:db:fb:8d:33:da:52:06:0c debug1: restore_uid: 0/0 debug3: mm_answer_keyallowed: key 0x7fffedd2b740 is allowed debug3: mm_request_send entering: type 22 debug3: mm_request_receive entering debug3: mm_key_verify entering debug3: mm_request_send entering: type 23 debug3: mm_key_verify: waiting for MONITOR_ANS_KEYVERIFY debug3: mm_request_receive_expect entering: type 24 debug3: monitor_read: checking request 23 debug3: mm_request_receive entering debug1: ssh_rsa_verify: signature correct debug3: mm_answer_keyverify: key 0x7fffedd2b720 signature verified debug3: mm_request_send entering: type 24 debug3: mm_request_receive_expect entering: type 51 debug3: mm_request_receive entering debug2: userauth_pubkey: authenticated 1 pkalg ssh-rsa debug3: mm_do_pam_account entering debug3: mm_request_send entering: type 51 debug3: mm_request_receive_expect entering: type 52 debug3: mm_request_receive entering debug1: do_pam_account: called debug3: PAM: do_pam_account pam_acct_mgmt = 9 (Authentication service cannot retrieve authentication info) debug3: mm_request_send entering: type 52 Failed publickey for chcsouza from 172.23.0.3 port 42046 ssh2 debug3: mm_do_pam_account returning 0 Access denied for user chcsouza by PAM account configuration debug1: do_cleanup debug3: PAM: sshpam_thread_cleanup entering debug3: mm_request_receive entering debug3: mm_request_send entering: type 80 debug3: mm_request_receive_expect entering: type 81 debug3: mm_request_receive entering debug3: monitor_read: checking request 80 debug3: mm_request_send entering: type 81 debug3: mm_request_receive entering debug1: do_cleanup debug1: PAM: cleanup debug3: PAM: sshpam_thread_cleanup entering [FAILED]
有任何想法吗？
[EDITED]
系统validation文件
root@service1:~# cat /etc/pam.d/system-auth auth required pam_env.so auth sufficient pam_unix.so try_first_pass nullok auth required pam_deny.so account required pam_unix.so password requisite pam_cracklib.so try_first_pass retry=3 type= password sufficient pam_unix.so try_first_pass use_authtok nullok md5 shadow password required pam_deny.so session optional pam_keyinit.so revoke session required pam_limits.so session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid session required pam_unix.so
我将在RedHat门户网站上find描述您情况的主题。 您可以尝试删除提到的PAM模块，或尝试运行authconfig --update或authconfig --updateall ，如其中所述。