Your probably thinking of entropy chat:
><form target="entropychat" action="http://tawneydelight.com:2084/">
Nick Name: <input type="text" name="nick" value="">
<input type="hidden" name="channel" value="tawneydelight.com">
<input type="submit" value="Enter Chat">
</form>
I think that's the port for cpanel so that's local.
This is melange chat:
>http://www.****/cgi-sys/mchat.cgi?channel=****
Seems to want a file in cgi-sys named 'mchat.cgi' to pass the channel parameter too. Now that I think about it, our cgi directory is called 'cgi-bin' so that's waaay off