Re: Public / private IP addresses
From: Alan Chandler (alan_at_chandlerfamily.org.uk)
Date: 12/30/03
- Previous message: Lone Iguana: "dpkg segfaults"
- In reply to: Antony Gelberg: "Public / private IP addresses"
- Next in thread: Nate Duehr: "Re: Public / private IP addresses"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
To: debian-user@lists.debian.org Date: Tue, 30 Dec 2003 08:07:40 +0000
On Monday 29 December 2003 11:43, Antony Gelberg wrote:
> Hi all,
>
> I've dealt with quite a few LANs over the years. I'd like to try
> something that I never have done before...
>
> I work with ADSL providers who allocate 5 public IP addresses (sometimes
> 1) to a connection. If I have a LAN of, say, 20 workstations, I can use
> NAT, and give them private addresses - no problem.
>
> I usually have an ADSL router / modem, hooked up to a Linux box
> configured as a bridging firewall, which connects to a switch.
>
> But if they wanted to run a public email server as well, clearly that
> needs a public IP address. Fine, but how does the routing aspect work?
> Do I need to ditch the bridging configuration on the firewall and
> reconfigure it as a router with 3 NICs? One connected to the WAN, one
> to the private LAN switch, and one to the public server(s) switch?
There is ANOTHER way - one that I use. My router allows port forwarding. In
other words a mail connection request on port 25 (SMTP) is forwarded by the
router from its WAN side IP address to a designated IP address on the Lan
side (10.0.10.100 in by case). I can do the same on other ports as well - so
for instance to make the web site available externally I forward port 80 to
the same machine.
-- Alan Chandler alan@chandlerfamily.org.uk -- To UNSUBSCRIBE, email to debian-user-request@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
- Previous message: Lone Iguana: "dpkg segfaults"
- In reply to: Antony Gelberg: "Public / private IP addresses"
- Next in thread: Nate Duehr: "Re: Public / private IP addresses"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
