From owner-freebsd-questions@FreeBSD.ORG Fri May 16 09:32:39 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6519F106564A for ; Fri, 16 May 2008 09:32:39 +0000 (UTC) (envelope-from sonicy@otenet.gr) Received: from rosebud.otenet.gr (rosebud.otenet.gr [195.170.0.94]) by mx1.freebsd.org (Postfix) with ESMTP id CE8F08FC0A for ; Fri, 16 May 2008 09:32:37 +0000 (UTC) (envelope-from sonicy@otenet.gr) Received: from joshua.freebsdgr.org (athedsl-4374375.home.otenet.gr [79.130.47.87]) (authenticated bits=0) by rosebud.otenet.gr (8.13.8/8.13.8/Debian-3) with ESMTP id m4G9WZH3025000 for ; Fri, 16 May 2008 12:32:36 +0300 Message-ID: <482D54B3.3060306@otenet.gr> Date: Fri, 16 May 2008 12:32:35 +0300 From: Manolis Kiagias User-Agent: Thunderbird 2.0.0.12 (X11/20080324) MIME-Version: 1.0 To: FreeBSD Questions Content-Type: text/plain; charset=ISO-8859-7; format=flowed Content-Transfer-Encoding: 7bit Subject: Routing to internet addresses ending with 255 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: Fri, 16 May 2008 09:32:39 -0000 I had this weird problem today, and I would like to know what caused it: I have two home servers, on different locations, on two ADSL lines using dynamic DNS. One is running Debian, the other FreeBSD 7.0-RELEASE. I usually ssh from one to the other. Today, the debian server had a public (internet) IP ending in 255. The FreeBSD 7.0 system refused to communicate with it. Another 6.3 system had no problem. The 6.3 and 7.0 system have identical adsl routers. Trying a traceroute from 7.0, it would seem the debian system was one hop away, which is of course incorrect. I understand that x.x.x.255 is ethernet's broadcast address. However 6.3 had no problem connecting to it, while 7.0 would not. Has something changed in FreeBSD, is this the intended behaviour or a bug? Furthermore, is it valid for my ISP to assign me an address ending in 255? The workaround was of course to ssh from another system, telnet into the router and reboot it so it gets another address. I would still like to know if there is any other solution.