Thanks for the link Blake. DNS Bajaj is pretty cool. Unfortunately the source seems to be missing from the dl dir, I'd like to take a look at it and maybe extend it - some mx and other lookups would round it out a bit.

I'm working on a gui frontend for this and some other snippets of similar code in tk. Perhaps called hostfe to do mx, ns lookups on multiple domains and reverse for a whole class C, and perhaps whois functionality - although whois can be pretty variable. *nix doesnt seem to have a Sam Spade equivalent. Id also like the mx checker to check for telnet/netcat to port 25 style banner checking and perhaps pop/110 banners

I think theres lots of room for a comprehensive reconisance tool for linux - think a tool that does all the functions discussed in Hacking Linux Exposed chapter 3 - mapping the network, also providing a command line interface to netcraft ( http://uptime.netcraft.com ) would be worth while.

Does anyone know a GPL project in perl doing stuff like this? If so i would like to get involved - otherwise I think i'll work on it myself (slowly :)