I'm looking to implement the Spamhaus drop list. http://www.spamhaus.org/drop/index.lasso On their FAQ they have a script that looks like it grabs the lists text file and connects to a given router, and tells you what has changed in the list, and what your router is null routing. I'm not sure if it then removes the null routes if a list entry has been removed. I haven't found much documentation on the net regarding this. In the future it looks like you will be able to peer with them and null route traffic from a private AS, which will be routes from the drop list. Right now though, it looks like you'd have to update an ACL manually for any changes to the list. Or use this script which null routes the traffic (I guess it's not a big deal getting the syn packets, as long as the mail won't send because of the null route). I am not sure if this script updates the null routes automatically, or how to use it, I can't find to much documentation. Any documentation on this script or another script available. What are your suggestions? thanks