From owner-freebsd-questions Wed Sep 25 11:10:40 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E56DA37B401 for ; Wed, 25 Sep 2002 11:10:38 -0700 (PDT) Received: from rwcrmhc51.attbi.com (rwcrmhc51.attbi.com [204.127.198.38]) by mx1.FreeBSD.org (Postfix) with ESMTP id 653BB43E77 for ; Wed, 25 Sep 2002 11:10:38 -0700 (PDT) (envelope-from fozekizer@attbi.com) Received: from rwcrwbc58 ([204.127.198.47]) by rwcrmhc51.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20020925181038.VGQH16629.rwcrmhc51.attbi.com@rwcrwbc58>; Wed, 25 Sep 2002 18:10:38 +0000 Received: from [4.60.254.198] by rwcrwbc58; Wed, 25 Sep 2002 18:10:37 +0000 From: fozekizer@attbi.com To: "Cody Swanson" Cc: questions@freebsd.org Subject: Re: Performance issues with natd Date: Wed, 25 Sep 2002 18:10:37 +0000 X-Mailer: AT&T Message Center Version 1 (Aug 12 2002) Message-Id: <20020925181038.VGQH16629.rwcrmhc51.attbi.com@rwcrwbc58> Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG it is not necessarily a NATD issue. your setup looks fine. the cards, however, are not exactly new. might wanna check your hardware. if not your hardware, then maybe someone here can give you a way to improve the transfer rate but i really think it has most to do with your hardware. > Hello all, > > I just setup a 4.6.2 machine locally on my network at home to replace an > aging Linux NAT box I had going. Clients behind the new box can only get > 100k/sec downloads while clients behind the old Linux box (running ipchains) > get 400k/sec+ downloads off the same cable modem. Locally on the new FreeBSD > box I can get 400k/sec downloads with lynx, it just seems as if the NAT is > not framing packets right. Also, I have tried downloads from other freeBSD > machines, Linux machines and windows2000 machines from inside the network. > All max out at around 100k/sec on a download through the NAT box. Again, if > I download on the > box it self I can see 400k/sec. > > The machine is a PIII500 with 512mb ram. I have a 3com 3c905 nic for the > internal LAN and a D-Link 530TX revA card for the external link to my cable > modem. I rebuilt the GENERIC kernel with the following options: > > options IPFIREWALL > options IPDIVERT > > And I added the following lines to rc.conf (as noted in the handbook) > > gateway_enable="YES" > kern_securelevel_enable="NO" > ifconfig_xl0="inet 192.168.1.254 netmask 255.255.255.0" > ifconfig_vr0="DHCP" > firewall_enable="YES" > firewall_type="OPEN" > natd_enable="YES" > natd_interface="vr0" > natd_flags="" > > Also, here is a copy of an ifconfig of the internal interface: > > pinky# ifconfig -xl0 > > xl0: flags=8843 mtu 1500 > inet 192.168.1.254 netmask 0xffffff00 broadcast 192.168.1.255 > inet6 fe80::260:97ff:fed5:5601%xl0 prefixlen 64 scopeid 0x2 > ether 00:60:97:d5:56:01 > media: Ethernet autoselect (100baseTX ) > status: active > > At first I thought this was a windows TCP window size issue, but then when > my freebsd and Linux boxes showed similar results I concluded it's an issue > with my Nat config. Is there anything I can do to increase the throughput? I > heard that 3com 3c905's are not the best card going but I have tried > swapping the card out with an intel and it made no difference in speed. Any > help would be greatly appreciated. > > > > > 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