Thread: Closed Relay - DNS Check

2 questions
#1 Fastest/best way to make sure your server is a closed relay? Cpanel server
#2 Anyone know of a good DNS check that is free yet? I used to use DNSstuff: On-demand DNS and network tools to analyze, diagnose and monitor a domain or IP address but it no longer is free.

I just caught some asshole somehow bypassing my firewall, all of my settings, etc and sending out spams on one of my dedicated servers!

GRIM added 2 Minutes and 8 Seconds later...

Ran the following via SSH.

/scripts/fixrelayd
/etc/rc.d/init.d/antirelayd restart
service exim restart

Now to find a good checker, anyone have one? I have some I've tried, no clue if they are 'good'

iptools.com can help

I can also check via my scans.