本地SSH使用“localhost”，但不使用IP地址

我无法在局域网上为笔记本电脑设置ssh。 我想我已经做了所有明显的事情。 在服务器上：

ps -A | grep sshd 18278 ? 00:00:00 sshd 

和

 ss -lnp 

显示sshd监听端口22.我检查hosts.deny和hosts.allow，都是空的。 UFW显示端口22上允许的连接，路由器防火墙closures。

在客户端：

• 在创build后检查Amazon AWS EC2实例的质量/速度
• （Intel（R）Xeon（R）CPU L5520 @ 2.27GHz）与专用（Intel（R）Xeon（R）CPU E3-1240 V2 @ 3.40GHz）
• find并删除tar.gz文件中某种types的文件
• rdiff备份同时进行
• 子域共享邮件服务器的SPFlogging

 ssh -v [email protected] martin@martin-UX21E 7:54PM OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 192.168.2.12 [192.168.2.12] port 22. debug1: Connection established. debug1: identity file /home/martin/.ssh/id_rsa type -1 debug1: identity file /home/martin/.ssh/id_rsa-cert type -1 debug1: identity file /home/martin/.ssh/id_dsa type -1 debug1: identity file /home/martin/.ssh/id_dsa-cert type -1 debug1: identity file /home/martin/.ssh/id_ecdsa type -1 debug1: identity file /home/martin/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1 debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 36:bf:c0:c6:d1:e0:16:bd:f0:8c:88:fe:1b:4b:12:74 debug1: Host '192.168.2.12' is known and matches the ECDSA host key. debug1: Found key in /home/martin/.ssh/known_hosts:1 debug1: ssh_ecdsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received Connection closed by 192.168.2.12 

在服务器上，

 ssh localhost 

工作正常，但是

 ssh 192.168.2.12 

没有。 由于某些原因，很高兴接受使用主机名的连接，而不是IP地址。

任何人都可以提出下一个故障排除步骤？

为了回应victorcete83：

 ssh -vvv [email protected] martin@martin-UX21E 8:00PM OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 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 192.168.2.12 [192.168.2.12] port 22. debug1: Connection established. debug1: identity file /home/martin/.ssh/id_rsa type -1 debug1: identity file /home/martin/.ssh/id_rsa-cert type -1 debug1: identity file /home/martin/.ssh/id_dsa type -1 debug1: identity file /home/martin/.ssh/id_dsa-cert type -1 debug1: identity file /home/martin/.ssh/id_ecdsa type -1 debug1: identity file /home/martin/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1 debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "192.168.2.12" from file "/home/martin/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/martin/.ssh/known_hosts:1 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,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,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,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,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,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,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 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: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 36:bf:c0:c6:d1:e0:16:bd:f0:8c:88:fe:1b:4b:12:74 debug3: load_hostkeys: loading entries for host "192.168.2.12" from file "/home/martin/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/martin/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug1: Host '192.168.2.12' is known and matches the ECDSA host key. debug1: Found key in /home/martin/.ssh/known_hosts:1 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/martin/.ssh/id_rsa ((nil)) debug2: key: /home/martin/.ssh/id_dsa ((nil)) debug2: key: /home/martin/.ssh/id_ecdsa ((nil)) Connection closed by 192.168.2.12