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Ident server

Started by zackriggle Dec 28, 2003 at 9:34 PM 1 replies 350+ views

Original Post

Dec 28, 2003 at 9:34 PM

I have a question about the Ident (Identification) protocol. (RFC931 among others). It's mainly used by IRC, which is why I need to figuer it out. Please tell me if anything is wrong with the following scenario. 1) Connect to some IRC server.. 2) My ident server accepts a connection.. 3) My ident server recv's "14444,6667" (where the server's IRC port is 6667 and my local port is 14444). 4) Check to see if I am, indeed connected like that (or just blow that part off, and switch the numbers around). 5) Send back to the server "6667,14444:USERID:MyUsername" or "6667,1444:ERROR:UNKNOWN-ERROR" in the event of an error. Is that about right? [edited by - zackriggle on December 28, 2003 10:44:46 PM]

hplus0603

Mod

3,014

hplus0603

Dec 28, 2003 at 9:49 PM

I once reverse-engineered it many years ago, and it wasn''t that hard. Use Ethereal or something to look at an existing implementation.

Or read the source of any of a number of implementations:

http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=identd+source+download&btnG=Google+Search

zackriggle

Author

zackriggle

Dec 29, 2003 at 12:20 AM

Yay! I got a working Ident server in under 30 minutes. Well, it sends a random username... but it WORKS!

For anyone who searches for Ident later on, this is the format for the data that they will send you:

"<their Server Port>, \r\n"

This is what you need to send back to them (in a nutshell):
", <thier Server Port> : USERID : UNIX : "

- Terms to pick up searches by others in the future -
ident identd identification protocol rfc 1413 931 912 rfc1413 rfc931 rfc912 irc ircd

[edited by - zackriggle on December 29, 2003 1:23:49 AM]

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