From owner-freebsd-net Mon Jul 19 13:48: 8 1999 Delivered-To: freebsd-net@freebsd.org Received: from topsecret.net (gill.apk.net [207.54.148.62]) by hub.freebsd.org (Postfix) with SMTP id 4FD8F1528C for ; Mon, 19 Jul 1999 13:48:04 -0700 (PDT) (envelope-from gill@topsecret.net) Received: from stumpy by topsecret.net with SMTP (MDaemon.v2.7.SP5.R) for ; Mon, 19 Jul 1999 16:42:55 -0400 From: "James Gill" To: Subject: RE: tomorrow a gateway... Date: Mon, 19 Jul 1999 16:42:51 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 Importance: Normal In-Reply-To: X-MDaemon-Deliver-To: freebsd-net@freebsd.org X-Return-Path: gill@topsecret.net Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I have added a diagram with a little more info at http://www.topsecret.net/net Communicating the problem is half of my communications problem! -> -> Hello :) -> -> I am new to FreeBSD and I'm working a FBSD 486 into my home -> network to act -> as a router and firewall, NAT, etc. but It's not quite ready -> yet. In the -> interim, I have both NICs in the machine and up on the same subnet and I -> keep getting these messages on the console: -> -> Jul 19 10:45:75 hostname /kernel: arp: 10.10.10.33 is on -> ed1 but got reply -> from -> 00:a0:24:23:78:e0 on ed0 -> -> It should be noted that the MAC address shown does correspond to the IP -> address, so that's all working fine. I think I understand the -> message; one -> NIC is ARPing for an IP and the other NIC is picking up the -> response thus -> confusing the host. It seems that this won't be a problem when -> I move to -> separate subnets, but having never set up a gateway before I -> don't think I'm -> ready to plop this machine in between my live network and the -> outside world. -> -> I think my question can be distilled down to: What do I have -> to know extra -> when putting two NICs of the same subnet in one host? -> -> Some more info: -> -> the network is connected up stream by an ISDN router that will be set to -> pass incoming packets to a single host, this will be the router box I'm -> working on. -> -> I am using an internal 10.*.*.* network, but only one class-C -> subnet of it. -> 10.10.10.* with a subnet mask of 255.255.255.192 dividing my -> network into -> four subnets. Here's what I got out of rfc1878 that I based -> all this on: -> -> Table 1-2 represents traditional subnetting of a Class C network -> address (which is identical to extended Class B subnets). -> -> Subnet Mask # of nets Net. Addr. Host Addr Range -> Brodcast Addr. -> Bits of Subnet hosts/subnet -> -> 255.255.255.192 4 nets N.N.N.0 N.N.N.1-62 N.N.N.63 -> 2 bit Class C 62 N.N.N.64 N.N.N.65-126 N.N.N.127 -> 10 bit Class B N.N.N.128 N.N.N.129-190 N.N.N.191 -> N.N.N.192 N.N.N.193-254 N.N.N.255 -> -> Currently, everything is in the first subnet, and when the gateway is -> activated, the internal stuff will be moved into the third -> subnet (by simply -> adding 100 to the host address). ...so currently the gateway -> has .2 and .29 -> and internal addresses are .30 - .33 but the gateway's internal -> interface -> will be .129 and internal will be .130 - .133 . -> -> Thanks in advance for any help... -> -> ===================================== -> James Gill * http://www.topsecret.net -> ===================================== To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message