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ssh 建立连接很慢的问题

June 19th, 2009 li Leave a comment Go to comments

如果发现 ssh 连接主机很慢，一般来说并不是公钥认证的过程耗时，最有可能的原因是 sshd 试图对 remote client address 做一次 DNS 反解析。

可以修改 /etc/ssh/sshd_config 文件，在文件最后加上一行（如果已存在 UseDNS 这个选择则修改）

UseDNS no

然后重启 ssh 即可

/etc/init.d/ssh restart

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