From owner-freebsd-net Sat Dec 28 6:57:28 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 86F0C37B401 for ; Sat, 28 Dec 2002 06:57:27 -0800 (PST) Received: from web14807.mail.yahoo.com (web14807.mail.yahoo.com [216.136.224.223]) by mx1.FreeBSD.org (Postfix) with SMTP id 31F8043EC2 for ; Sat, 28 Dec 2002 06:57:27 -0800 (PST) (envelope-from rosti_bsd@yahoo.com) Message-ID: <20021228145727.43219.qmail@web14807.mail.yahoo.com> Received: from [192.117.108.59] by web14807.mail.yahoo.com via HTTP; Sat, 28 Dec 2002 06:57:27 PST Date: Sat, 28 Dec 2002 06:57:27 -0800 (PST) From: Rostislav Krasny Subject: Re: PPPoE and troubles with TCP To: Julian Elischer Cc: freeBSD-net@freebsd.org, Gene Bomgardner In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org --- Julian Elischer wrote: > look at the tcp mssfixup option in ppp This option is enabled by default in ppp, look what `man 8 ppp` says: [tcp]mssfixup Default: Enabled. This option tells ppp to adjust TCP SYN pack- ets so that the maximum receive segment size is not greater than the amount allowed by the interface MTU. Anyway, I enabled and disabled it manually in my ppp.conf but both variants didn't help me. RASPPPOE in Win98SE in the same box have similar option that is enabled by default too. I also didn't see any difference when I disabled it there. The purpose of this option in both FreeBSD's ppp and RASPPPOE is fixing MSS of connection between some LAN's computer and external host when my box is the getway. But I have no LAN here, my box connected only to my ADSL modem. This is why 'mssfixup' option have no influence in both operating systems that I have in my computer. But when I use Win98SE with RASPPPOE I have no problem with www.ssh.com, only when I use FreeBSD I have the trouble with that host. Moreover, I still can't understand how MRU == MTU == 1484 (or smaller) solves my problem? In Win98SE with RASPPPOE I have MTU == 1492. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message