Welcome, these tools were orginally developed by Ted Harapat and are available in their original form here.
"Here's my webtools page. Too many tools that I love on my UNIX system(s) are inaccessable
to the average friend/co-worker of mine. Yet everyone has access to webpages.
So my choices to help people out involve either giving shell accounts out and
teaching people how to run specific UNIX comands or I could just write these tools
on the web. So here they are (in order of writing):"
NSLookup Gateway - queries 15 major US nameservers and several foreign nameservers.
Custom NSLookup Gateway - do your own lookup off of the DNS server that you want.
MXLookup Gateway - same as above, but it looks up the MX (Mail Exchanger) for hosts.
RBL Lookup - checks to see if a host/IP # is on any Realtime Blackhole Lists.
Open Relay Tester Tool - attempts to relay a single message through a remote mail server.
Whois Lookup - checks domain to see if its registered. And if so, it provides info on it.
Traceroute Tool - traces the route to said host and sends 10 packets and reports the results.
Long(er) Traceroute Tool - traces the route to said host and sends 50 packets and reports the results.