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Article #82Re: Enforcing asymmetric TCP MSS?
From: Henning Brauer
Date: Tue, 10 May 2011 13:16
Date: Tue, 10 May 2011 13:16
21 lines
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1745 bytes
* Eric Lee <elee25@gmail.com> [2011-05-10 10:30]: > I'm trying to use scrub max-mss rules to create asymmetric MSS's. > > Is this supported? So far, I haven't got it to work (hence my post here). > The machine is running OpenBSD 4.9 with 2 network cards. > > I have been trying things like: > match out on $ext proto tcp scrub(max-mss 1000) flags S/SA > match in on $ext proto tcp scrub(max-mss 500) flags SA/SA that doesn't work because only one of those two rules ever matches a given connection, from then on the state decides. using two match rules on different interfaces should work i think. the only other option is stateless, but that is stupid for many many reasons. -- Henning Brauer, hb@bsws.de, henning@openbsd.org BS Web Services, http://bsws.de Full-Service ISP - Secure Hosting, Mail and DNS Services Dedicated Servers, Rootservers, Application Hosting
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X-Google-Thread: ff4ef,344061a51fc8e357 X-Google-NewGroupId: yes X-Google-Attributes: gidbffa70e3,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!spln!newsgate.newsguy.com!newsp.newsguy.com!mdrn From: henning@openbsd.org (Henning Brauer) Newsgroups: bit.listserv.openbsd-pf Subject: Re: Enforcing asymmetric TCP MSS? Date: 10 May 2011 06:16:02 -0700 Organization: None Lines: 21 Message-ID: <20110510120414.GR15178@nudo.bsws.de> References: <BANLkTi=g-V5DdnpOhgSTCC4Na2RQZb47CA@mail.gmail.com> NNTP-Posting-Host: localhost.newsguy.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii NNTP-Posting-Date: 10 May 2011 13:16:02 GMT