Date: Thu, 23 Jun 2005 19:46:46 -0400 From: "Michael H. Semcheski" <lists@immuneit.com> To: freebsd-questions@freebsd.org Subject: Re: NAT router confusion Message-ID: <200506231946.47626.lists@immuneit.com> In-Reply-To: <5591e955475b.55475b5591e9@liu.se> References: <5591e955475b.55475b5591e9@liu.se>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thursday 23 June 2005 07:43 pm, Ulf Magnusson wrote: > Is this router really some switch/router hybrid? Or..? Bleh, someone > please sort this out for me. I realize this isn't strictly > FreeBSD-related, but I simply couldn't think of a better place to pick > brains, so I hope I'll be excused :) It is a switch / router hybrid. If the traffic is going to an address on the same network, its a switch. If the traffic is going to an address on a different network, its a router. If you understand that concept, then you should have a pretty good idea of how the system works. I do not have a complete enough understanding of IP networks to explain this in specific detail. I think the key is that the computer generating the traffic looks at the netmask for the sending interface (eg, 255.255.255.0) and uses this to determine if the endpoint of the traffic is on the same network or not. If it is, it sends the traffic directly to the host. If it is on a different network, it forwards the traffic to the gateway address. Mike
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200506231946.47626.lists>