Re: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-tsvwg-port-randomization
Joe Touch <touch@ISI.EDU> Sun, 12 August 2007 00:25 UTC
Return-path: <tcpm-bounces@ietf.org>
Received: from [127.0.0.1] (helo=stiedprmman1.va.neustar.com) by megatron.ietf.org with esmtp (Exim 4.43) id 1IK1GO-0006WC-Py; Sat, 11 Aug 2007 20:25:00 -0400
Received: from [10.91.34.44] (helo=ietf-mx.ietf.org) by megatron.ietf.org with esmtp (Exim 4.43) id 1IK1GM-0006VT-KW; Sat, 11 Aug 2007 20:24:58 -0400
Received: from vapor.isi.edu ([128.9.64.64]) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1IK1GM-0003Lr-4r; Sat, 11 Aug 2007 20:24:58 -0400
Received: from [128.9.176.38] (c1-vpn8.isi.edu [128.9.176.38]) by vapor.isi.edu (8.13.8/8.13.8) with ESMTP id l7C0OcQV009619; Sat, 11 Aug 2007 17:24:38 -0700 (PDT)
Message-ID: <46BE533B.4020702@isi.edu>
Date: Sat, 11 Aug 2007 17:24:27 -0700
From: Joe Touch <touch@ISI.EDU>
User-Agent: Thunderbird 2.0.0.6 (Windows/20070728)
MIME-Version: 1.0
To: "Anantha Ramaiah (ananth)" <ananth@cisco.com>
Subject: Re: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-tsvwg-port-randomization
References: <0C53DCFB700D144284A584F54711EC5803B6C80C@xmb-sjc-21c.amer.cisco.com>
In-Reply-To: <0C53DCFB700D144284A584F54711EC5803B6C80C@xmb-sjc-21c.amer.cisco.com>
X-Enigmail-Version: 0.95.3
X-ISI-4-43-8-MailScanner: Found to be clean
X-MailScanner-From: touch@isi.edu
X-Spam-Score: 0.0 (/)
X-Scan-Signature: b4a0a5f5992e2a4954405484e7717d8c
Cc: tcpm@ietf.org, tsvwg WG <tsvwg@ietf.org>, DCCP mailing list <dccp@ietf.org>, Fernando Gont <fernando@gont.com.ar>, TSV Dir <tsv-dir@ietf.org>, ext@cisco.com, Murari Sridharan <muraris@microsoft.com>
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
Content-Type: multipart/mixed; boundary="===============0028738219=="
Errors-To: tcpm-bounces@ietf.org
Anantha Ramaiah (ananth) wrote: > Lars had sent an email to retain focus on the port randomization and > hence this is going to my last comment... Pl see inline.. > >> >> Anantha Ramaiah (ananth) wrote: >>> Murari, >> ... >>> - or do it in piecemeal, first buy more TCP option space, >> standardize >>> any one of the proposals for extending the TCP option >> space. Then have >>> an extended port option like yu suggest below. Then think >> about other >>> TCP fields requiring extension. >> The problem is that buying more option space is equivalent to >> requiring a whole new TCP header - it has the same problems >> with backward compatibility. Previous attempts explored this > > New TCP header == "Mountain" , IMO this is equivalent to using SCTP in > some sense. > > TCP option space == "Molehill" , this is a "minimal" change with "some" > backward compat issues which can be addressed. This was tried before and was shown to be a mountain of equivalent size to a new TCP header. The problem is that the space is needed in the SYN, and there's no backward-compatible way to change the options in the first packet sent. > If I take your above para seriously, then you are in a way implying that > there is no new TCP options possible :-( or in other words users of TCP > would be rationed to use only a few options in the initial SYN exchange. I didn't mean to imply that; I meant to state that explcitly. Joe
_______________________________________________ tcpm mailing list tcpm@ietf.org https://www1.ietf.org/mailman/listinfo/tcpm
- [tcpm] Revision of draft-larsen-tsvwg-port-random… Fernando Gont
- Re: [tcpm] Revision of draft-larsen-tsvwg-port-ra… Lars Eggert
- Re: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Lars Eggert
- RE: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Murari Sridharan
- RE: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-ts… Anantha Ramaiah (ananth)
- RE: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-ts… Murari Sridharan
- Re: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Joe Touch
- Re: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-ts… Joe Touch
- RE: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Murari Sridharan
- Re: [Tsvwg] Re: [tcpm]Revision ofdraft-larsen-tsv… Wesley Eddy
- Re: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Joe Touch
- Re: [Tsvwg] Re: [tcpm]Revision ofdraft-larsen-tsv… Joe Touch
- RE: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-ts… Anantha Ramaiah (ananth)
- [tcpm] discussion of TCP option space Joe Touch
- RE: [Tsvwg] Re: [tcpm] Revision of draft-larsen-t… Fernando Gont
- Re: [Tsvwg] Re: [tcpm] Revision ofdraft-larsen-ts… Joe Touch