On Fri, Jul 07, 2006 at 01:22:56PM -0700, bruce wrote: > i tried to run nmap from inside my network, pointing it to my external ip > address.. Depending on how your network is set up, this may or may not be a useful test. > nmap foo.com -p113 for port #113 > i get > port filtered unknown/(known app) > i assume this indicates that the port is open... Why do you assume that? As suggested, check the man page, which for this particular program is quite well written -- easy to read and helpful. An excerpt: Filtered means that a firewall, filter, or other network obstacle is blocking the port so that Nmap cannot tell whether it is open or closed. -- Matthew Miller mattdm@xxxxxxxxxx <http://mattdm.org/> Boston University Linux ------> <http://linux.bu.edu/>