我不能从任何机器ssh到我们的服务器之一（在同一个networking）。 我尝试在详细模式下运行ssh，但没有得到任何错误：
vincent@feed01:/var/cache/feed$ ssh -vvv [email protected] OpenSSH_5.9p1 Debian-5ubuntu1.1, 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 feed02.xxx.com [192.168.0.161] port 22. debug1: Connection established. debug1: identity file /home/vincent/.ssh/id_rsa type -1 debug1: identity file /home/vincent/.ssh/id_rsa-cert type -1 debug1: identity file /home/vincent/.ssh/id_dsa type -1 debug1: identity file /home/vincent/.ssh/id_dsa-cert type -1 debug1: identity file /home/vincent/.ssh/id_ecdsa type -1 debug1: identity file /home/vincent/.ssh/id_ecdsa-cert type -1 从那一刻起，什么也没有发生，我不得不按Ctrl-C重新获得terminal。
auth.log也没有捕获任何东西。 我们尝试过不同的机器，不同的用户，同样的问题。
iptables -L INPUT -v -n | less
什么也不返回
可能是什么问题 ？