my server is on centos 5.5,it is just a new reinstall system i build a php depend on server and used nginx,php,mysql ssh is default 22 port The system perfomance good a few time.but it is always happen a problem only need hardware reboot to solve.the server is on idc.so i can not see the local screen information. the appearance is: 1.it can not use ssh to connect,it show server is down or rebooting 2.ping is ok 3.http can show nginx's information(nginx/0.8.46),but can not load right page,and it show 403 forbiden page i use another server use ssh -vv xxx.xxx.xxx.xxx,and the responce is: SSH2_MSG_KEXINIT sent close sshd hangs after SSH2_MSG_KEXINIT sent i do not know what happen,please give me a good answer thanks erverbody -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20110131/3768dfe3/attachment-0004.html>