RE: [midcom] Port preservation
"Christopher A. Martin" <chris@sip1.com> Wed, 28 April 2004 04:09 UTC
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Reply-To: Chris@sip1.com
From: "Christopher A. Martin" <chris@sip1.com>
To: 'Jonathan Rosenberg' <jdrosen@dynamicsoft.com>
Cc: 'Cullen Jennings' <fluffy@cisco.com>, 'Yutaka Takeda' <takeday@pcrla.com>, 'Midcom' <midcom@ietf.org>, stun@www.vovida.org
Subject: RE: [midcom] Port preservation
Date: Tue, 27 Apr 2004 22:45:57 -0500
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I was offering another example, IKE is also an example... This isn't hard...someone asked why the solution might be used, there are a dozen reasons why, servers, ike are common ones... Why dig so hard here...???? There is no confusion, just offered another example... -----Original Message----- From: Jonathan Rosenberg [mailto:jdrosen@dynamicsoft.com] Sent: Tuesday, April 27, 2004 10:49 AM To: Chris@sip1.com Cc: 'Cullen Jennings'; 'Yutaka Takeda'; 'Midcom'; stun@www.vovida.org Subject: Re: [midcom] Port preservation I think you are confusing two things. One is a client behind a nat speaking to a server on the public side. There, I think there are very, very few cases where the source port means anything (IKE is the only identified one there). The other case is a server running behind the NAT (i.e., on the private side), which is what you are talking about below. In such a case, I think you would use port forwarding configuration on the nat, and so port preservation on dynamically created bindings isnt applicable. -Jonathan R. Christopher A. Martin wrote: > I guess I should also state the port that I am describing is a listening > port (which is often also the source port) of the server being NATted, > while I am at it. > > -----Original Message----- > From: midcom-admin@ietf.org [mailto:midcom-admin@ietf.org] On Behalf Of > Christopher A. Martin > Sent: Tuesday, April 27, 2004 8:09 AM > To: 'Cullen Jennings'; 'Jonathan Rosenberg' > Cc: 'Yutaka Takeda'; 'Midcom'; stun@www.vovida.org > Subject: RE: [midcom] Port preservation > > Ya, clients typically do use random ports, I am only speaking from a > server standpoint (Enterprises don't typically static nat a client). > > :) > > Chris > > -----Original Message----- > From: Cullen Jennings [mailto:fluffy@cisco.com] > Sent: Tuesday, April 27, 2004 12:37 AM > To: Chris@sip1.com; Jonathan Rosenberg > Cc: 'Yutaka Takeda'; Midcom; stun@www.vovida.org > Subject: Re: [midcom] Port preservation > > On 4/26/04 7:00 PM, "Christopher A. Martin" <chris@sip1.com> wrote: > > >>For clarity, common server ports in this example would be HTTP, SMTP, >>FTP, etc. > > > Well for TCP, the NATs don't muck with ports at all. The clients I have > for > HTTP, SMTP, FTP, also use source ports different than the destination > ports > so that the clients don't have to open a port under 1024 which would > require > them to be running as root. > > > > > _______________________________________________ > midcom mailing list > midcom@ietf.org > https://www1.ietf.org/mailman/listinfo/midcom > -- Jonathan D. Rosenberg, Ph.D. 600 Lanidex Plaza Chief Technology Officer Parsippany, NJ 07054-2711 dynamicsoft jdrosen@dynamicsoft.com FAX: (973) 952-5050 http://www.jdrosen.net PHONE: (973) 952-5000 http://www.dynamicsoft.com _______________________________________________ midcom mailing list midcom@ietf.org https://www1.ietf.org/mailman/listinfo/midcom
- [midcom] Port preservation Yutaka Takeda
- Re: [midcom] Port preservation Pyda Srisuresh
- RE: [midcom] Port preservation Yutaka Takeda
- Re: [midcom] Port preservation Cullen Jennings
- RE: [midcom] Port preservation Pyda Srisuresh
- RE: [midcom] Port preservation Christopher A. Martin
- Re: [midcom] Port preservation Jonathan Rosenberg
- RE: [midcom] Port preservation Christopher A. Martin
- RE: [midcom] Port preservation Christopher A. Martin
- Re: [midcom] Port preservation Cullen Jennings
- Re: [stun] Re: [midcom] Port preservation Cullen Jennings
- RE: [midcom] Port preservation Christopher A. Martin
- RE: [midcom] Port preservation Christopher A. Martin
- Re: [midcom] Port preservation Jonathan Rosenberg
- RE: [midcom] Port preservation Christopher A. Martin
- RE: [midcom] Port preservation Christopher A. Martin
- RE: [midcom] Port preservation Yutaka Takeda