Date: Fri, 6 Jul 2001 10:45:40 +0200 From: Khalil.Haddad@ubs.com To: questions@FreeBSD.ORG Subject: RE: Re: UDP client behind a nat. How? Message-ID: <H0000152004e5f06.0994409139.ps3p84.par.swissbank.com@MHS>
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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" <enriko.groen@netivity.nl> To: "'Artem Koutchine'" <matrix@ipform.ru>; <questions@FreeBSD.ORG> 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
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