From owner-freebsd-questions Fri Jul 6 1:46:22 2001 Delivered-To: freebsd-questions@freebsd.org Received: from gate.ldn.swissbank.com (gate.ldn.ubswarburg.com [193.82.179.18]) by hub.freebsd.org (Postfix) with ESMTP id 46DED37B403 for ; Fri, 6 Jul 2001 01:46:18 -0700 (PDT) (envelope-from Khalil.Haddad@ubs.com) Received: (from smap@localhost) by gate.ldn.swissbank.com (8.8.8/8.8.8) id JAA20498 for ; Fri, 6 Jul 2001 09:46:11 +0100 (BST) From: Khalil.Haddad@ubs.com Received: from (twelve.ubswarburg.com [192.168.0.6]) by gate via smap (V2.0) id xma018019; Fri, 6 Jul 2001 09:45:46 +0100 Received: from ln4p1013pos.ldn.swissbank.com (virscan3 [192.168.0.6]) by virscan3.swissbank.com (8.8.8/8.8.8) with ESMTP id IAA02986 for ; Fri, 6 Jul 2001 08:45:47 GMT Received: from ln4p1528.ldn.swissbank.com (ln4p1528.ldn.swissbank.com [172.16.232.54]) by ln4p1013pos.ldn.swissbank.com (8.8.8/8.8.8) with ESMTP id JAA21676 for ; Fri, 6 Jul 2001 09:45:43 +0100 (BST) Received: from ps3p84.par.swissbank.com (ps3p84.par.swissbank.com [155.145.25.41]) by ln4p1528.ldn.swissbank.com (8.8.6 (PHNE_14041)/8.8.6/WDR gamma evision: 1.4 $) with ESMTP id JAA27082 for ; Fri, 6 Jul 2001 09:45:42 +0100 (BST) Received: from localhost (root@localhost) by ps3p84.par.swissbank.com (8.8.6 (PHNE_14041)/8.8.6/WDR gamma evision: 1.4 $) with ESMTP id KAA23876 for ; Fri, 6 Jul 2001 10:45:41 +0200 (METDST) X-OpenMail-Hops: 1 Date: Fri, 6 Jul 2001 10:45:40 +0200 Message-Id: Subject: RE: Re: UDP client behind a nat. How? MIME-Version: 1.0 To: questions@FreeBSD.ORG Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline; filename="BDY.TXT" ;Creation-Date="Fri, 6 Jul 2001 10:45:40 +0200" Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG i **think** that icq when connection to the icq server establishes a connection and thus makes an entry in the NAT which can then reroute the incoming packets to the internal machines of your network. A more experienced user should confirm that. -----Original Message----- From: matrix [mailto:matrix@ipform.ru] Sent: 06 July 2001 10:32 To: enriko.groen; questions Cc: matrix Subject: Re: UDP client behind a nat. How? Let me clear it up. There is a client with address: 192.168.0.2 There is a gateway with nat: local interface: 192.168.0.1 internet interface: a.b.c.d ICQ SERVER: W.X.Y.Z Now, how does ICQ server send data to the icq client which is on 192.168.0.2 via NAT? ----- Original Message ----- From: "Enriko Groen" To: "'Artem Koutchine'" ; Sent: Friday, July 06, 2001 11:52 AM Subject: RE: UDP client behind a nat. How? > > -----Original Message----- > > From: Artem Koutchine [mailto:matrix@ipform.ru] > > > I don't undertstand how ICQ works behind > > natl? How does server send data to > > the client, which is behind a NAT firewall? > > As far as i know iCQ uses UDP and does not > > keep connection open, so, no soket associated > > with the ICQ on NAT or ICQ SERVER. ICQ client > > cannot be accessed directly. Then HOW does > > a message appear in ICQ when server gets it? > > I need to know it because i need to do the same > > thing. > > You confuse two things: > > Yes, ICQ uses UDP and UDP is connectionless... however it does use a > socket/port. > So you'll need to open the ICQ port on your firewall. I think it is 4000, > but I'm not that sure. > > -- > Enriko Groen, Hosting manager > -------------------------------------------------------- > netivity bv www.netivity.nl enriko.groen@netivity.nl > 038 - 850 1000 van nagellstraat 4 8011 eb zwolle > -------------------------------------------------------- > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message