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name resolution in sshd

Hello!

I get the following in my messages:

xxx sshd[15208]: User root from v31711.1blu.de not allowed because not listed in
AllowUsers

Which I know is somebody trying to access my server via ssh.

So I installed a ssh blacklisting which is looking for such entries an blocking the ip if there a three tries of one ip missing.

Now my question:

How can i turn of ip adress resolution so that i don`t get v31711.1blu.de in the messages log, but the true IP so i can use this adress directly for iptables ?

very similar to somethign i answered yesterday... check the sshd_config manpage for the UseDNS option, which is "yes" by default.

Thanks i just changed the config. Hope that helps!