From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Fullmer Subject: Re: Port 25 Delay Date: Wed, 16 Jul 2003 19:07:52 -0600 Sender: linux-admin-owner@vger.kernel.org Message-ID: References: <20030716175511.27bb7c1c.matt.hemingway@pcnalert.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20030716175511.27bb7c1c.matt.hemingway@pcnalert.com> List-Id: Content-Type: text/plain; charset="us-ascii" To: matt.hemingway@pcnalert.com, linux-admin@vger.kernel.org What specifically are you using as a firewall? A Cisco router? A PIX firewall? A Foundry layer 3 switch? - Jon on 7/16/03 6:55 PM, Matt Hemingway at matt.hemingway@pcnalert.com wrote: > Okay. I'm gonna try to keep this short. I'm not gonna go into too much > detail...yet. > > Problem: It takes 5 minutes for any machine (any OS) on one subnet, which > we'll call Subnet1, to connect to mail.server.com:25. From the same subnet, > Subnet1, and again, from any machine, connecting to a website that is hosted > on mail.server.com:80 it works fine. > > We have another subnet, which we'll call Subnet2, where connecting to > mail.server.com:25 works fine. The difference between the 2 subnets is a > firewall, which is also the gateway for both subnets. The rules governing the > 2 subnets are basically the same, except that Subnet2 has tighter > restrictions. Connected to the firewall is a router, which traffic coming > from both subnets, going and coming from the internet must travel. > > What I do know is: > > It's not a routing problem. > It's not ident or port 113. > It's not OS specific. > We're not being blocked. > user@mail.server.com can e-mail us with no problems. > > I've run ethereal on a machine in Subnet1 and a machine in Subnet2. The > packets going to and from both machines to mail.server.com are (almost) > identical. > > We've rebooted the firewall and router....still no luck. > > Any and all suggestions would be greatly appreciated. If you want some more > info, lemme know. > > Thanks and godspeed! > > -Matt > > p.s. the winner gets a hug and possibly, if I get drunk enough, a kiss.