From owner-freebsd-questions@FreeBSD.ORG Sat Nov 8 21:24:54 2014 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3622A8CD for ; Sat, 8 Nov 2014 21:24:54 +0000 (UTC) Received: from www81.your-server.de (www81.your-server.de [213.133.104.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id EA004E2B for ; Sat, 8 Nov 2014 21:24:53 +0000 (UTC) Received: from [77.23.74.131] (helo=michael-think.fritz.box) by www81.your-server.de with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.80.1) (envelope-from ) id 1XnDUx-0000Vf-B7; Sat, 08 Nov 2014 22:24:43 +0100 Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes To: "Freebsd Questions" , "Gary Aitken" Subject: Re: ARP only, no ICMP packets? References: <8c6d3f5dbb1ebe2feac628f7ca52eb22.squirrel@webmail.blackfoot.net> Date: Sat, 08 Nov 2014 22:24:34 +0100 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: "Michael Ross" Message-ID: In-Reply-To: <8c6d3f5dbb1ebe2feac628f7ca52eb22.squirrel@webmail.blackfoot.net> User-Agent: Opera Mail/1.0 (Win32) X-Authenticated-Sender: gmx@ross.cx X-Virus-Scanned: Clear (ClamAV 0.98.4/19601/Sat Nov 8 18:39:13 2014) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Nov 2014 21:24:54 -0000 On Sat, 08 Nov 2014 21:33:44 +0100, Gary Aitken wrote: > After reconfiguring my internal network to private ip addrs, > I'm trying to reconfigure a DLink wireless access point. > At first I tried using the old IP addrs and configuring my > workstation with an alias on the old network. That didn't > work, so I've reset the wap. The manual says default addr is > 192.168.0.50 netmask 255.255.255.0 > > The box I'm trying to access it from has an ip of 192.168.151.122/24. > I've added an alias to the interface for the 192.168.0 subnet: > > Routing tables > > Internet: > Destination Gateway Flags Refs Use Netif > Expire > default 192.168.151.101 UGS 0 0 re0 > 127.0.0.1 link#10 UH 0 59752 lo0 > 192.168.0.0/24 link#1 U 0 121 re0 > 192.168.0.122 link#1 UHS 0 0 lo0 > 192.168.151.0/24 link#1 U 0 54 re0 > 192.168.151.122 link#1 UHS 0 0 lo0 > > When I attempt to access the WAP, I see only ARP requests, > and it appears not to answer: > > $ arp -n -a > ? (192.168.151.122) at f4:6d:04:78:70:62 on re0 permanent [ethernet] > ? (192.168.0.122) at f4:6d:04:78:70:62 on re0 permanent [ethernet] > ? (192.168.151.101) at 00:01:02:c2:a1:a8 on re0 expires in 339 seconds > [ethernet] > > # tcpdump -flnt -i re0 | grep 192.168.0.50 > tcpdump: verbose output suppressed, use -v or -vv for full protocol > decode > listening on re0, link-type EN10MB (Ethernet), capture size 65535 bytes > ARP, Request who-has 192.168.0.50 tell 192.168.0.122, length 28 No ARP reply... > I have difficulty believing the wap unit is defective, as "it worked > before I changed all the addresses..." Maybe not defective as such, but some DLinks ( mine for example ) ignore everything not originating from their own /24, so unless packets come from 192.168.0.x, they will be silently discarded. Michael