Fixed IP Addresses And NAT

When my exchange is enabled early next year I am going to Zen with 8 fixed
IP addresses and will use a router. To start with is it possible to use just
one of the fixed IP addresses and NAT for my local network and start to use
the other fixed ones as I get sorted?

nospam wrote:

> When my exchange is enabled early next year I am going to Zen with 8 fixed
> IP addresses and will use a router. To start with is it possible to use
> just one of the fixed IP addresses and NAT for my local network and start
> to use the other fixed ones as I get sorted?

Yes, the router will will need an external IP address, you don't have to
have the others in use.

Why do you need so many fixed IP addresses when you have NAT?

--
Paul

"Paul" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> nospam wrote:
>
> > When my exchange is enabled early next year I am going to Zen with 8
fixed
> > IP addresses and will use a router. To start with is it possible to use
> > just one of the fixed IP addresses and NAT for my local network and
start
> > to use the other fixed ones as I get sorted?
>
> Yes, the router will will need an external IP address, you don't have to
> have the others in use.
>
> Why do you need so many fixed IP addresses when you have NAT?
>
> --
> Paul
>

I understood that if I was to run say a web server or a mail server I would
need more than one fixed IP address. Or would NAT and port forwarding be a
better way to go?

Paul <(E-Mail Removed)> wrote:
>nospam wrote:
>
>> When my exchange is enabled early next year I am going to Zen with 8 fixed
>> IP addresses and will use a router. To start with is it possible to use
>> just one of the fixed IP addresses and NAT for my local network and start
>> to use the other fixed ones as I get sorted?
>
>Yes, the router will will need an external IP address, you don't have to
>have the others in use.
>
>Why do you need so many fixed IP addresses when you have NAT?

There are plenty of reasons to need a bank of fixed IP addresses in addition
to using NAT for a whole load more machines on a network.

Other than the fact that he may be planning on installing multiple servers
of the same type on different machines on his network (eg 2 SMTP servers)
one typical and obvious example of needing multiple IP addresses on even
a single machine would be to run multiple instances of a secure web server.
--
David Mahon
Reply to newsreply_01 at amigo.co.uk

"Kimball K Kinnison" <nospam@(nospam)yahoo.com> wrote:

>I understood that if I was to run say a web server or a mail server I would
>need more than one fixed IP address. Or would NAT and port forwarding be
a
>better way to go?

You could quite easily forward port 80 to one machine and port 25 to another,
but personally I'd stick with using real IP addresses insteak of kludging
the issue with port forwarding. Do make sure that all the machines on your
network using "real" (externally addressable) IP's are adequately secured
by a firewall.
--
David Mahon
Reply to newsreply_01 at amigo.co.uk

David Mahon wrote:

> Other than the fact that he may be planning on installing multiple servers
> of the same type on different machines on his network (eg 2 SMTP servers)
> one typical and obvious example of needing multiple IP addresses on even
> a single machine would be to run multiple instances of a secure web
> server.

But I was wondering what /his/ reasons were. Since he was asking a basic
networking question, I think it very unlikely any of the reasons you
correctly put forward would apply.

OTOH, if he wants to host games in the future, it's slightly simpler for the
router to have a fixed IP so a block of two rather than six usable IP
addresses might be justified and there's a lot to be said for hiding behind
NAT.

--
Paul