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Re: (ASCEND) ICQ Problems with P75 and Single IP Addr NAT Enabled

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On Sun, 20 Sep 1998, John Cain wrote:

> Date: Sun, 20 Sep 1998 20:19:27 -0700 (PDT)
> From: John Cain <cain57@yahoo.com>
> To: ascend-users@bungi.com
> Subject: (ASCEND) ICQ Problems with P75 and Single IP Addr NAT Enabled
> 
> I suspect I will have to Static Map something somewhere to fix it,
> probably UDP port 4000  but I am not sure.. 
> 
> Anybody around here seen this and fixed it??  ICQ has some Firewall
> stuff built in, something about Socks5 and Socks Proxy Server??  
> 
	When I placed my personal machine behind a complete firewall I had
to modify both the firewall and ICQ to work with it. You have to allow the
outgoing connections to destination port 4000 from any originating port.
You can then tell ICQ to only use a set range of TCP ports for all other
communication rather than random UDP ports. This way you don't have to
deal with a SOCKS server at all. Since most SOCKS servers are
misconfigured and then mis-used by the wrong people they were intended
for.
	This works on my Debian Linux system with the JavaICQ version for
Linux using the standard kernel firewalling with ipfwadm.

	Respectfully,
	Jeremy T. Bouse
	Sr. System Administrator


,-----------------------------------------------------------------------------,
|  Jeremy T. Bouse   -   SouthNet TeleComm Services, Inc.   -   www.STSI.net  |
|     PGP ID/Fingerprint: 1024/E83D9AE5/4ACC03F098D78198 19D0593E50E597E9     |
|   Public PGP key available via PGP keyserver at http://pgp.UnderGrid.net    |
|  undrgrid@UnderGrid.net   -   NIC Whois: JB5713    -    sysadmin@STSI.net   |
|      Anti-trust laws should be approached with exactly that attitude.       |
`-----------------------------------------------------------------------------'

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