在VPN内部，有一个已知区域为“gitlab”的DNS服务器。 当尝试执行除SSH以外的任何操作（以及使用SSH – scp，git）到此主机名时，它将起作用，但使用SSH会拒绝连接。
这是一个terminal会话，应该显示相当好的问题：
$ nslookup gitlab Server: 172.31.27.193 Address: 172.31.27.193#53 Name: gitlab Address: 172.31.25.132 $ ssh git@gitlab Permission denied (publickey). $ ssh [email protected] PTY allocation request failed on channel 0 Welcome to GitLab, Benjamin Hutchins! Connection to 172.31.25.132 closed. $ ping -c 1 gitlab PING gitlab (172.31.25.132) 56(84) bytes of data. 64 bytes from 172.31.25.132: icmp_seq=1 ttl=64 time=0.530 ms --- gitlab ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.530/0.530/0.530/0.000 ms $ ping -c 1 172.31.25.132 PING 172.31.25.132 (172.31.25.132) 56(84) bytes of data. 64 bytes from 172.31.25.132: icmp_seq=1 ttl=64 time=0.570 ms --- 172.31.25.132 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.570/0.570/0.570/0.000 ms $ ssh -vvv git@gitlab OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 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 gitlab [::1] port 22. debug1: Connection established. debug1: identity file /home/bhutchins/.ssh/id_rsa type -1 debug1: identity file /home/bhutchins/.ssh/id_rsa-cert type -1 debug1: identity file /home/bhutchins/.ssh/id_dsa type -1 debug1: identity file /home/bhutchins/.ssh/id_dsa-cert type -1 debug1: identity file /home/bhutchins/.ssh/id_ecdsa type -1 debug1: identity file /home/bhutchins/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/bhutchins/.ssh/id_ed25519 type -1 debug1: identity file /home/bhutchins/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "gitlab" from file "/home/bhutchins/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/bhutchins/.ssh/known_hosts:3 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: [email protected],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],[email protected],ssh-ed25519,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[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],[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: [email protected],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],[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],[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: setup [email protected] debug1: kex: server->client aes128-ctr [email protected] none debug2: mac_setup: setup [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 45:e9:a6:c4:f4:8d:14:06:4a:ea:de:68:04:69:c2:f4 debug3: load_hostkeys: loading entries for host "gitlab" from file "/home/bhutchins/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/bhutchins/.ssh/known_hosts:3 debug3: load_hostkeys: loaded 1 keys debug1: Host 'gitlab' is known and matches the ECDSA host key. debug1: Found key in /home/bhutchins/.ssh/known_hosts:3 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: /Users/bhutchins/.ssh/id_rsa (0x7fccfbc60360), debug2: key: /home/bhutchins/.ssh/id_rsa ((nil)), debug2: key: /home/bhutchins/.ssh/id_dsa ((nil)), debug2: key: /home/bhutchins/.ssh/id_ecdsa ((nil)), debug2: key: /home/bhutchins/.ssh/id_ed25519 ((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: /Users/bhutchins/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey debug1: Trying private key: /home/bhutchins/.ssh/id_rsa debug3: no such identity: /home/bhutchins/.ssh/id_rsa: No such file or directory debug1: Trying private key: /home/bhutchins/.ssh/id_dsa debug3: no such identity: /home/bhutchins/.ssh/id_dsa: No such file or directory debug1: Trying private key: /home/bhutchins/.ssh/id_ecdsa debug3: no such identity: /home/bhutchins/.ssh/id_ecdsa: No such file or directory debug1: Trying private key: /home/bhutchins/.ssh/id_ed25519 debug3: no such identity: /home/bhutchins/.ssh/id_ed25519: No such file or directory debug2: we did not send a packet, disable method debug1: No more authentication methods to try. Permission denied (publickey). 我似乎无法find任何人报告类似的问题。 我正在运行这个terminal会话的服务器是AWS上新的Ubuntu 14.04。 它试图与主机名gitlab交谈的服务器在同一个VPC这台服务器上。 任何想法可能会导致这种事故？
@Jakuje和@Halfgaar帮助指出了这个问题。 这是由于ssh使用IPv6，并且内部专用DNS服务器将IPv6的AAAAlogging错误地configuration为::1为每个logging。
修复绑定区域文件后，事情开始工作。