Eu tenho um usuário do sistema chamado user1 (o principal). Eu tentei definir uma conexão ssh entre um usuário chamado foreignuser e o principal ( user1 ). Para isso, geramos algumas chaves com ssh-keygen . Eu adicionei a chave pública de foreignuser ao arquivo .ssh / authorized_keys do usuário user1 . Eu verifiquei as permissões do arquivo .ssh (700) e .ssh / authorized_keys (600). Está tudo bem. Eu posso conectar como user1 de foreignuser .
Agora, adicionei um novo usuário chamado user2 (estou usando o Kubuntu). Eu repeti exatamente os mesmos passos. Mas desta vez, quando tento me conectar como user2 de foreignuser , recebo isso:
Connection closed by 192.168.0.201
Mas, se eu for para o arquivo /etc/ssh/sshd_config e alternar a linha usePAM yes para usePAM no , salvar e reiniciar o serviço ssh, posso conectar como usuário2 de foreignuser .
O que poderia estar acontecendo? Se usePAM estiver definido como yes e eu tentar conectar via ssh com -vvv , obtenho o seguinte:
OpenSSH_6.2p2 Ubuntu-6ubuntu0.4, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 192.168.0.201 [192.168.0.201] port 8022.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/foreignuser/.ssh/id_rsa" as a RSA1 public key
debug1: identity file /home/foreignuser/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-4096
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-4096
debug1: identity file /home/foreignuser/.ssh/id_rsa-cert type -1
debug1: identity file /home/foreignuser/.ssh/id_dsa type -1
debug1: identity file /home/foreignuser/.ssh/id_dsa-cert type -1
debug1: identity file /home/foreignuser/.ssh/id_ecdsa type -1
debug1: identity file /home/foreignuser/.ssh/id_ecdsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2p2 Ubuntu-6ubuntu0.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2p2 Ubuntu-6ubuntu0.4
debug1: match: OpenSSH_6.2p2 Ubuntu-6ubuntu0.4 pat OpenSSH*
debug2: fd 3 setting O_NONBLOCK
debug3: put_host_port: [192.168.0.201]:8022
debug3: load_hostkeys: loading entries for host "[192.168.0.201]:8022" from file "/home/foreignuser/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/foreignuser/.ssh/known_hosts:31
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found [email protected]
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: found [email protected]
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 80:e4:73:c4:4d:a9:30:97:08:3c:f9:f8:ab:80:f4:72
debug3: put_host_port: [192.168.0.201]:8022
debug3: put_host_port: [192.168.0.201]:8022
debug3: load_hostkeys: loading entries for host "[192.168.0.201]:8022" from file "/home/foreignuser/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/foreignuser/.ssh/known_hosts:31
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "[192.168.0.201]:8022" from file "/home/foreignuser/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/foreignuser/.ssh/known_hosts:31
debug3: load_hostkeys: loaded 1 keys
debug1: Host '[192.168.0.201]:8022' is known and matches the ECDSA host key.
debug1: Found key in /home/foreignuser/.ssh/known_hosts:31
debug1: ssh_ecdsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/foreignuser/.ssh/id_rsa (0x7fc896efb2a0),
debug2: key: /home/foreignuser/.ssh/id_dsa ((nil)),
debug2: key: /home/foreignuser/.ssh/id_ecdsa ((nil)),
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/foreignuser/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-rsa blen 535
debug2: input_userauth_pk_ok: fp 8d:1e:b2:59:64:e5:07:bf:5c:9e:5b:ad:45:8a:c8:c2
debug3: sign_and_send_pubkey: RSA 8d:1e:b2:59:64:e5:07:bf:5c:9e:5b:ad:45:8a:c8:c2
debug1: read PEM private key done: type RSA
Connection closed by 192.168.0.201