ssh 每隔几天就登陆不上问题

luxinjun888

ssh连接时报错SSH socket failed: Connection reset by peer  请大家帮忙看看,谢谢！
在出故障的时候不止SSH端口不能连接，FTP等端口也不能连接的。
用SSH -VVV 日志信息如下：
（这是centos登陆debian6.0系统的日志，131是一台debian的机器，系统版本为6.0.4）
[root@DNS44 default]# ssh -vvv 211.100.40.131
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 211.100.40.131 [211.100.40.131] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-6+squeeze1
debug1: match: OpenSSH_5.5p1 Debian-6+squeeze1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.9p1
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
Read from socket failed: Connection reset by peer


(一下是从debian服务器登陆debian机器报的SSH连接信息)
root@debian:~# ssh -vvv root@211.100.40.131
OpenSSH_5.5p1 Debian-6+squeeze1, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 211.100.40.131 [211.100.40.131] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug3: Not a RSA1 key file /root/.ssh/id_rsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /root/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-6+squeeze1
debug1: match: OpenSSH_5.5p1 Debian-6+squeeze1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze1
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
Connection closed by 211.100.40.131
root@debian:~#


从日志信息看，在debug1: SSH2_MSG_KEXINIT sent后终止，这个阶段是SSH连接的第二个阶段双方确认/支持使用的数据加密算法,消息摘要算法,主机公钥等信息的地方，在SSH2_MSG_KEXINIT sent后应该有个SSH2_MSG_KEXINIT  received接收确认过程，在这个地方中断连接，不知是否有关系，还在研究中，也请大家帮忙分析一下，谢谢！！

chenyx

你的服务器负载情况怎么样?
登陆不进去的时候,最好能在机器前面,看看屏幕上有什么信息.

luxinjun888

回复 2# chenyx

看过，接上显示器后屏幕不显示，只能重启。而且这次装的4台debian 6.0.4版本的系统，已经有两台出现这种问题了。系统负载应该是不高的，只跑了一个apache和vsftp,这些都只对业务单位提供服务，访问量不大的。而且另外一台机器都还没上线，每隔几天就会出现这种现象。
（日志也没有什么有用信息，都是如下信息：）

root@debian:~# tail -f /var/log/auth.log
May  3 09:56:01 debian CRON[10899]: pam_unix(cron:session): session opened for user root by (uid=0)
May  3 09:56:01 debian CRON[10899]: pam_unix(cron:session): session closed for user root
May  3 09:57:01 debian CRON[10919]: pam_unix(cron:session): session opened for user root by (uid=0)
May  3 09:57:02 debian CRON[10919]: pam_unix(cron:session): session closed for user root
May  3 09:58:01 debian CRON[10940]: pam_unix(cron:session): session opened for user root by (uid=0)
May  3 09:58:01 debian CRON[10940]: pam_unix(cron:session): session closed for user root
May  3 09:59:01 debian CRON[10960]: pam_unix(cron:session): session opened for user root by (uid=0)
May  3 09:59:05 debian CRON[10960]: pam_unix(cron:session): session closed for user root
May  3 09:59:13 debian sshd[10980]: Accepted password for root from 59.108.43.203 port 64589 ssh2
May  3 09:59:13 debian sshd[10980]: pam_unix(sshd:session): session opened for user root by (uid=0)
   

346279055

ssh服务有问题，重装ssh

chenyx

接上显示器都没有显示,系统会不会和硬件兼容出问题了呢?楼主换个发行版看看还有没有这样的问题

luxinjun888

回复 4# 346279055


    重装过sshd也重装过系统，没有解决掉

luxinjun888

回复 5# chenyx


嗯，现在系统已经准备换别的版本了，机器时dell  R510和710，打电话给DELL他们不支持没有验证授权的系统，debian他们就不管了

   

346279055

suse redhat 都不错