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reverse name解決が出来ずSSH接続出来ない場合の対処方法

@do9iigane@do9iigane 4028 viewer 40 embed viewer embed
/var/log/secureにて[reverse mapping checking getaddrinfo for xxx.xxx.xxx.xxx hogehoge.com failed - POSSIBLE BREAK-IN ATTEMPT!] とか出ちゃってSSH接続が出来ない場合は、 /etc/ssh/sshd_configでDNSを使わないように設定する。

UseDNS no

※defaultはyes(centos 5.8で確認)
http://nixcraft.com/centos-rhel-fedora/17507-howto-disable-reverse-name-resolution-security-procedure-ssh-client-end.html
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