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STATIC IP and FIXED BROADBAND IP CONFUSION!!!

RDBoon
Member

Hi there, hoping someone can help me get my head around the use of static IPs in order for me to setup my network correctly.

I understand the idea behind static ip, and I currently use it on some of the devices within my internal network.

However I have developed a need to ‘fix’ my 'broadband IP' permanently as at the moment it is obviously dynamic and is therefore changing every now and again which is causing problems.

 

My setup is a simple one, I have a BT 2701 HGV-C Business Hub, which has DHCP enabled (as already mentioned, some of the machines are fixed address but most obtain their IPs automatically from the router).

The IP range being given out is the usual 192.168.1.x with the router gateway being 192.168.1.254

My problem is that I need to allow remote connections in, and I’m being told that my broadband IP address keeps changing which is causing problems.

 

To get the ball rolling I purchased a set of Static IPs from BT, and followed the instructions to setup a Public Network.

I managed to get it to accept the setting for this Public network, and even got it to fix a machine on the network to a public address. But it didn’t seem to really do anything when I tried to use the IP from a different broadband line.

 

But my main concern is that although I had created this Public Network, the actual ‘broadband ip’ as displayed by the router was still dynamic. There does appear to be an area on the router where you can set the broadband IP manually but when I try this and click save it just wipes it out and puts it back to ‘obtain automatically’.

 

I think initially I need to better understand the difference between the ‘router/gateway’ IP and the ‘broadband ip’ if there is a difference at all.


Then this might help me better understand what it is I need to do.

 

BT have told me that I was right to purchase the static ips and that I can use this to have a static ip connection, but is creating a public network (using the supplemental network area) the same as fixing your broadband IP?? This is where I’m getting confused, because I set up a public network, but my router was still receiving a dynamic ‘broadband IP’ from the ISP. 

 

I don't want to have to turn the DHCP off, and still want the router to have a gateway address of 192.168.1.254 if possible so it doesn't affect my current network devices, but I just want a fixed/static broadband IP, am I actually losing the plot with thinking I can do this? 

 

Anyone experts out there this morning? Could really do with some guidance!

 

Thanks in advance...

3 REPLIES 3

RDBoon
Member

No one has replied, but I've done more digging, that I hope will make this all clearer in case my original post was too messy.

 

I think what I'm experiencing is a problem caused by the 'peer address' allocated to my range of static ips (of which I have purchased a set of 5).

 

According to a previous post, this peer address changes all the time, which causes problems with remote connecting when you need your WAN IP to never change.

 

Therefore the apparent solution is to change the 5 statics to just one, which will apparently force the router into remembering it and using that only as the WAN IP.

 

Anyone else thinks this makes sense?

RichCreedy
Super User

yes if you only need the one static ip address, you order one, if you need 5 static addresses(web hosting, sbs server,remotedesktop to different machines, vpn) you order 5, and set your equipment to either forward the different ip addresses to the different machines or services, or assign each machine a static ip address.

 

the following post has information on how to setup multiple static ip addresses on non bt equipment

kimura
Super User

Hi RDBoon. I guess what you are trying to do is to have a fixed IP address (Public) on the WAN side. Make sure that you set the static IP purchased on the WAN side.