CentOS 6 SSH問題 - Linux

請教版上高手 CentOS 6 kernel 2.6.32-71.el6.i686

已安裝open-ssh和tcp_wrappers

遠端此台電腦被拒絕,message是

ssh_exchange_identification connection closed by remote host

到此台電腦上查看,在/var/log/secure裡看到

sshd[7435]:warning: cannot open /etc/hosts.deny: Permission denied.
sshd[7435]:warning: cannot open /etc/hosts.allow: Permission denied.
接著就refused

嘗試改/etc/hosts.allow hosts.deny的權限也無法(一模一樣的檔在CentOS4上work)
並且也已經將sshd_config改成Protocal 1,2(允許舊版ssh login)

google了一下似乎跟public-key有關?有人遇過類似問題嗎??大感謝!!

--