Re: [MLUG] IRC

[Adam Procter <EMAIL:PROTECTED>]

On Tue, 3 Dec 2002, Michael wrote:

> What kind of proxy? I've been toying with running Squid (it lets me
> download files with wget on the server and then grab them directly from
> the proxy with the normal link) but I can't imagine why irc would care
> about that. I've used irc without problem. What network are you trying?

Oh.  Yeah, that's it all right.  You've got your squid set up to allow
connection forwarding from anywhere to anywhere via the HTTP CONNECT
method.  So you can do things like this:

 > [EMAIL:PROTECTED adam]$ telnet mlug.missouri.edu 3128
 > Trying 128.206.61.230...
 > Connected to mlug.missouri.edu.
 > Escape character is '^]'.
 > CONNECT somewhere.interesting:25 HTTP/1.0
 >
 > HTTP/1.0 200 Connection established
 >
 > 220 somewhere.interesting ESMTP Sendmail 8.12.3/8.12.3/Debian -4; Wed, 4 Dec
 > 2002 22:00:56 -0600; (No UCE/UBE) logging access from:
 > mlug.missouri.edu(OK)EMAIL:PROTECTED [128.206.61.230]

IRC networks scan for this and other types of open proxies and block
servers which have them open.  I've killed your squid server for now;
before you bring it back up, please configure it not to allow the CONNECT
method (or at least not to allow it from from, or to, the whole world).

Thanks,

-- 
Adam Procter
EMAIL:PROTECTED
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