Hi, all. I am opposed to blocking all ICMP, for many good reasons. I do limit the ICMP types and codes I allow, however, and have put together a list that might help others as well: http://www.cymru.com/Documents/icmp-messages.html Feedback is welcome and encouraged. Be the first in your ASN to make it to the Credits section. :) I hope this helps! Simon, thanks for the suggestion to post this link to the list. Thanks, Rob. -- Rob Thomas http://www.cymru.com ASSERT(coffee != empty); - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog