I have created and am releasing a NetTools plugin. Briefly it provides whois, nslookup, ping, and tracert within the Geeklog environment and using Geeklog security.
I created this mainly to provide a reliable integrated whois for the Visitor Stats plugin and expanded it with the other tools.
You can actually use all the tools (as root) without installing it as a plugin, but to use Geeklog security you must install it.
You can get it
here.
Enjoy
TomW