Network setup

[David Jenkins]

On Fri, 8 Oct 2004 11:51:53 +0200 (CEST), Svein Halvor Halvorsen
<svein-freebsd-questions at theloosingend.net> wrote:
> 
> At home I have in my network:
> 
>  - A FreeBSD server
>  - A FreeBSD workstation
>  - A Windows gaming box
>  - A FreeBSD laptop
>  - A friend's backup server
> 
> All are connected to a switch witch in turn is connected to the internett.
> I have real ethernet comming into my house, and all my machines have
> public IP-addresses which are handed out by a DHCP server outside of my
> control.
> 
> Since my ISP have started to enforce soft bandwidth limiting, with the
> consequence of losing my connection for 48 hours if exceeded, I need some
> mean to count my traffic. Only traffic outside the subnet is counted.
> 
> I therefore thought I could put another FreeBSD machine between my switch
> and the internet, which counts traffic (and also acts as a firewall).
> However, I can not afford to get another box to do this. So I thought I
> could use the server. I also want to put a wireless card in the firewall
> to allow me to move around with my laptop. Something like this:
> 
>                      Internet
> 
>                         |
>                         |
>                         |
>                  ---------------
>                  |    fxp0     |
>                  |             |         --------------
>                  | FBSD Server |  ) ) )  |   Laptop   |
>                  |             |  802.11 |  FreeBSD   |
>                  |    fxp1     |         --------------
>                  ---------------
>                         |
>                     ----------
>                     | Switch |
>                     ----------
>                         |
>          -------------------------------
>          |              |              |
>   -----------------     |      -----------------
>   | Workstation 1 |     |      | Workstation 2 |
>   |   FreeBSD     |     |      |    Windows    |
>   -----------------     |      -----------------
>                         |
>                -------------------
>                | Friend's server |
>                |    FreeBSD      |
>                -------------------
> 
> I'd like the possibility to have the workstations on the public internet
> (with public IP-addresses handed out by my ISP's DHCP sever). I must admit
> I'm out of my league here, but I guess I'd like the FBSD server to be
> invisible for the workstations and the backup server, but still be able
> analyse the IP-traffic. Is this possible? Does this kind of setup have a
> name, for which I can google?
> 
> If this is impossible, I guess I could setup NAT on the server/firewall,
> and forward a couple of ports to the server behind the firewall.
> 
> The issue is that all the traffic needs to be counted, and at least two
> machines needs to be visible on the public internet. Additionally I'd like
> to have a wireless connection for my laptop. I guess an ad-hoc setup would
> do for this?
> 
> SVein Halvor
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Hi Svein,

I *think* you might need to setup a network bridge.

http://www.freebsd.org/doc/en_US.ISO8859-1/articles/filtering-bridges/index.html

Hope this helps.

David