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Slow SSH login issue on Linux

Posted on December 16, 2015December 16, 2016 by Vishwanath Mule

Many times I have encountered this issue that user is waiting for long duration to get password prompt. I used to type fast and working on couple of windows so hate to wait for longer duration just to insert my password.

I have searched about this issue and found out the cause so sharing that with you all to avoid waiting window. Solution is very simple.

Whenever user is login using SSH its going through reverse DNS lookup and searching host details from machine IP address before login to machine. This is helpful for security purpose but our default configuration and SELINUX security does that job anyway.

This is default setting present in sshd_config for reverse DNS lookup.

new1

Modify it by removing # and changing ‘yes’ to ‘no’

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Continue reading “Slow SSH login issue on Linux” →

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