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no-nat... can it really be no nat?

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no-nat... can it really be no nat?

adsl has just been activated, and plusnet have assigned me 4 ip numbers each with a different use:
network address
router
spare
broadcast
with a subnet mask of 255.255.255.252

Plusnet say they do not do tech support for network configuration, so maybe someone else can help?

i only have 3 pcs to connect. According to their documentation i can have 2 ip addresses, and must use NAT to get more. i dont believe them.

surely i only need 1 ip address for the router, and the other 3 for the pcs. They would be static ip addresses, with no NAT or DHCP or anything else. i dont care about having a proper network with filesharing etc., just want internet access with static IP addresses for all 3 machines.

surely this is possible?
4 REPLIES
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RE: no-nat... can it really be no nat?

When you are assigned an IP block the first and last IP is used by your network to communicate. These are called the network and broadcast address.

This leaves the middle 2 IP's, which are usable by equipment on your network. Normally the second IP in your block is used by the router, leaving you one usable IP for a machine which can be seen by the outside world.

This machine can run services and also deliver web access to the rest of the network via DHCP.

Kind Regards

Kevin

--
--
| Kevin Revill ............... Unmetered & ADSL solutions
| PlusNet Customer Support .......... for Home & Business
| PlusNet Technologies Ltd. ....... @ http://www.plus.net
+ ----- My Referrals - It pays to recommend PlusNet -----
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RE: no-nat... can it really be no nat?

> When you are assigned an IP block the first and
> last IP is used by your network to communicate.
> These are called the network and broadcast
> address.

This is my problem - i really dont need this
network stuff. i just want 3 pcs connected to the
internet. understand the need for network cards and
a router, but surely the router is designed to take
ip packets and deliver them to the correct pc?
If it cant do that, what use is it?
N/A

RE: no-nat... can it really be no nat?

A long time ago it was not evisioned that so many people would be using the internet as such they gave out IP addresses by the handful. Now the world is running out of unused IP addresses and as such the IP body RIPE wish all ISPs to justify their assignment of IP addresses.

As such we can give out additional IPs to people who can justify the need. Currently you have not done so. The usagfe which you have discribed of having a few PCs have internet access can all be done on a nat single IP account. Currently you have a no-nat 4 IP block. If you have need of more IPs you will have to raise a contact us request lining out why you require more.

Kind regards

Kevin
--
--
| Kevin Revill ............... Unmetered & ADSL solutions
| PlusNet Customer Support .......... for Home & Business
| PlusNet Technologies Ltd. ....... @ http://www.plus.net
+ ----- My Referrals - It pays to recommend PlusNet -----
N/A

RE: no-nat... can it really be no nat?

Thanks for your reply.

You misunderstand - i am not trying to obtain more
IP addresses - simply use the ones i have more
efficiently. i do not understand the need for a
globally visible IP address for "network address"
and "broadcast" when i do not need a network.

It seems that it should be possible to utilise 3
out of the 4 IP addresses you have allocated, one
for each pc.

The reason i asked for No-Nat is:
a) i need to get behind my employers firewall, so
need a static IP address for the work pc.
b) i will be playing online games using the other
2 pcs, and some sites insist on each player
having a different ip address.

So preferably i need 3 different and static IP
addresses. You have allocated me 4 which should
be more than adequate.

My questions are:
1) Is it possible to use the IP addresses i have
to connect my pcs to the internet directly?
2) Is the IP address usage you gave me a suggestion,
or requirement for using the service?

I am trying to get the most out of the IP addresses
you have allocated, i understand they are a valuable
commodity and the last thing on my mind is to waste
them - i want to use them.