From owner-freebsd-questions@FreeBSD.ORG Wed Jun 13 18:58:47 2007 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 61D2C16A400 for ; Wed, 13 Jun 2007 18:58:47 +0000 (UTC) (envelope-from mksmith@adhost.com) Received: from mail-defer01.adhost.com (mail-defer01.adhost.com [216.211.128.150]) by mx1.freebsd.org (Postfix) with ESMTP id 4902913C458 for ; Wed, 13 Jun 2007 18:58:47 +0000 (UTC) (envelope-from mksmith@adhost.com) Received: from mail-in08.adhost.com (mail-in08.adhost.com [10.211.128.141]) by mail-defer01.adhost.com (Postfix) with ESMTP id 17A54EE827 for ; Wed, 13 Jun 2007 10:13:52 -0700 (PDT) (envelope-from mksmith@adhost.com) Received: from ad-exh01.adhost.lan (unknown [216.211.143.69]) by mail-in08.adhost.com (Postfix) with ESMTP id BE61D8FC51 for ; Wed, 13 Jun 2007 10:13:51 -0700 (PDT) (envelope-from mksmith@adhost.com) Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Wed, 13 Jun 2007 10:14:05 -0700 Message-ID: <17838240D9A5544AAA5FF95F8D52031602171721@ad-exh01.adhost.lan> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Ethernet Card Limitations to Number of Connections? Thread-Index: Acet3j8DOaHkiIlXScCNOHfj9TFgQA== From: "Michael K. Smith - Adhost" To: Cc: Subject: Ethernet Card Limitations to Number of Connections? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jun 2007 18:58:47 -0000 Hello All: Are there any physical limitations to the number of connections (TCP/UDP) that are determined by the physical interface itself? We have a PF load-balancing solution in place in front of a large number of mail servers and we're considering using the same boxes to front our Name Server/Name Resolvers. I'm concerned that the single uplink port on the PF box will be overloaded with the number of connections. Any insights would be greatly appreciated. Regards, Mike