From owner-freebsd-questions Fri Aug 3 18:21:33 2001 Delivered-To: freebsd-questions@freebsd.org Received: from aviator.jukeware.com (b0gj509oy50se.bc.hsia.telus.net [216.232.103.13]) by hub.freebsd.org (Postfix) with SMTP id A485037B407 for ; Fri, 3 Aug 2001 18:21:30 -0700 (PDT) (envelope-from gjukema@jukeware.com) Received: (qmail 16618 invoked by uid 0); 4 Aug 2001 01:18:43 -0000 Received: from unknown (HELO localhost) (@192.168.0.1) by 192.168.0.1 with SMTP; 4 Aug 2001 01:18:43 -0000 To: questions@freebsd.org From: gjukema@jukeware.com Mime-Version: 1.0 Subject: Re: unable to ping through WAN Date: Fri, 3 Aug 2001 18:18:43 Message-Id: <20010804012130.A485037B407@hub.freebsd.org> Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi Fernando, > snip < > > The sobnet mask is covered in both books. In short, all it does is say > how many bit of the IP address are part off the "network addr" and how > many are the "host addr". > > In your case, if the mask were 255.255.0.0, the FreeBSD box would think > 10.10.10.0 and 10.10.20.0 are the same net, so instead of forwarding > the packet to the router, it would ARP trying to resolve the MAC of > the destination host. Since the host is on anoter net, it would never > respond and the FBSD box would time out. > > When you fixed the mask, the bsd box could tell that the destination was in > another net, and forwarded it to the router > > Hope this helps. Very much so. Thank you, this is exactly the confirmation and explanation I needed. I appretiate your time, and advice on the literature. I'll be researching "TCP/IP Illustrated, Vol. 1" very shortly. Geoff To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message