Multiple Static IP's with BT business bb

[Illusion]

Hi Guys,

New to this forum so Hi!

Today I requested a block of 5 IP's from BT and I am having some trouble using them, this could come across as noobish so please take it easy on me if I am doing something blatently wrong.

Now I was told by the person on the phone that I just had to reboot my router (Belkin 7633 at the time) and that it would automatically pick up the new IP details and voila, there I am.

This did not happen.

Calling BT back didn't get me anywhere, the girl on the phone didn't have a clue and was just putting me on hold all the time.

I couldn't get the Belkin to work with a static IP so I have gone back to the awful BT Business Hub. Now after following the instructions on their website I have managed to get this sort of working. I will try and explain below:

Internet//// ----(81.148.xx.xx) BT Hub ---- Local Network (left on private ips)
............................................|
............................................|------Debian Server on public ip 217.40.xx

What confuses me is that the BT Hub appears to have one of the static IPs assigned to it aswell as the 81.148 address, forgive me for being stupid but I was under the impression I would just set the router as the first static IP in the range and use the rest for whatever I needed.

The Deb server does indeed appear to be fully accessible to the internet but running simple commands on it like ping and whois queries doesn't get me anywhere, and google suggests this could be a routing issue because my router doesn't know where to send the reply packets.

Could someone with some knowledge please shed some light on this situation, has anyone had any experience setting up multiple (or a single) static IPs with BT business broadband?

Is it even possible to use the Belkin router as I despise the BT one?

I can see this turning into a long post as I have so many questions to ask so I will stop here for now, any help would be GREATLY appreciated.

Thanks in advance.

 

[Illusion]

They did things in a funny way I seem to remember, so the routers external ip was dynamically allocated & you set the routers internal ip to the 1st one in the range they have given you.

Thats right, although the business hub has the natted internal range and a separate range for the IPs that have been allocated...

Looking at your diagram can either of the devices you have do a proper dmz to seperate from the lan?

To be honest I don't know, I just want eth1 on the debian server to have a public ip and eth0 an internal one, I'm not too clued up on setting this kind of thing up at the moment which is one of the reasons I am trying to do it.

Surely they issue you a block of IPs? Issue the first usable IP with subnet mask and gateway to the router and then use another IP from the block to the required machine. Wouldn't it be more secure to use PAT so at least the PC is protected by a Firewall?

As m_cozzy said above the router continues to pick up a dynamic IP from BT, after looking around this is the norm it would seem, although I don't see why.

HI
What normally happens when BT issues you an IP block is you should be told your IP Range, Gateway address and Submask (255.255.255.248 - is normal for 5 addresses)

You will then need to set your Router up using those details - for example:
G/W Address from BT is used as your routers FIXED IP
Submask - 255.255.255.248
Some routers as cleaver enough to workout the IP Range from using the G/W address and submask.

Then assign your client machines with one of the IP's from your allocated range

Rob

Thanks Rob, this is what I originally intended to do, but I can't set my routers WAN IP statically as mentioned above.

The printout from BT has the IP range and Subnet Mask, it also has a Router Port IP which is 217.40. something . something but not within the subnet of my IP's. Any idea what this is for?


The connection does actually work at the moment with the BT Hub, the main reason I am posting is because I don't fully understand how!

Again all help is much appreciated.

Thanks

 

[Illusion]

Thats a great post, thanks for the help.

So if I change it to just a single static IP, will this be assigned to my router rather than how things are at the moment? This is what I originally wanted...

Thanks

 

[Illusion]

I already have a dyndns account, it sucks. I cant use this with a domain name as far as I am aware.

Cheers