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Editor to share with you what to do if SSH login is too slow, I believe most people don't know much about it, so share this article for your reference. I hope you will gain a lot after reading this article. Let's learn about it together.

If the reverse parsing of DNS is incorrect at this time, sshd will wait until DNS parsing times out before providing a ssh connection, which results in a long connection time and a waiting time for ssh clients, which is usually about 10-30 seconds. A simple solution is to cancel the reverse DNS parsing of sshd in the sshd configuration file (sshd_config).

# vi / etc/ssh/sshd_config

UseDNS no

# / etc/init.d/sshd restart

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