Trillium,
I hope this advances your knowledge. A couple of days ago one of my exits was threatened with suspension for being 'blacklisted'. The VPS business gave me this (below) and was happy when I blocked the ports. It is more limiting of TOR but the exit survived.
" Listing on the Sectoor TOR DNSBL indicates that this IP address is a tor node or a subnet (/24) containing a tor node. This listing does not indicate that your IP address has been blacklisted by Sectoor, as this list also contains subnets that contain a tor node. The subnet listing is not designed to block connections, but rather for use as a scoring mechanism. Your IP will only be blacklisted if it is the tor node itself and listed by Sectoor Exitnodes.
Sectoor TOR DNSBL lists every IP address which is known to run a tor server and allow their clients to connect to one of the following ports:
Port 25 Port 194 Port 465 Port 587 Port 994 Port 6657 Ports 6660-6670 Port 6697 Ports 7000-7005 Port 7070 Ports 8000-8004 Port 9000 Port 9001 Port 9998 Port 9999 More information about SECTOOR can be found at their website: http://www.sectoor.de/tor.php
Robert