4.2.13 Configuring SSH - set MaxAuthTries to 4 or Less

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The MaxAuthTries parameter specifies the maximum number of authentication attempts permitted per connection. When the login failure count reaches half the number, error messages will be written to the syslog file detailing the login failure.

Setting the MaxAuthTries parameter to a low number will minimize the risk of successful brute force attacks to the SSH server. While the recommended setting is 4, it is set the number based on site policy.


Edit the/etc/ssh/sshd_config file-

vi /etc/ssh/sshd_config


MaxAuthTries 4

Re-cycle the sshd daemon to pick up the configuration changes-

stopsrc -s sshd
startsrc -s sshd

See Also