[root@NB Downloads]# ssh -p22022 -vv 123.5x.xx.xxxOpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013debug1: Reading configuration data /etc/ssh/ssh_configdebug1: Applying options for *debug2: ssh_connect: needpriv 0debug1: Connecting to 123.xx.xxx.xx [123.57.xx.xxx] port 22022.debug1: Connection established.debug1: permanently_set_uid: 0/0debug1: identity file /root/.ssh/identity type -1debug1: identity file /root/.ssh/identity-cert type -1debug1: identity file /root/.ssh/id_rsa type -1debug1: identity file /root/.ssh/id_rsa-cert type -1debug1: identity file /root/.ssh/id_dsa type -1debug1: identity file /root/.ssh/id_dsa-cert type -1debug1: identity file /root/.ssh/id_ecdsa type -1debug1: identity file /root/.ssh/id_ecdsa-cert type -1ssh_exchange_identification: Connection closed by remote host

 

# cat /etc/hosts.allow ## hosts.allow    This file contains access rules which are used to#        allow or deny connections to network services that#        either use the tcp_wrappers library or that have been#        started through a tcp_wrappers-enabled xinetd.##        See 'man 5 hosts_options' and 'man 5 hosts_access'#        for information on rule syntax.#        See 'man tcpd' for information on tcp_wrappers#sshd:all #加上这一行问题解决

 但这样不安全所有的被禁掉的ip都 可以再会失效果!!!!