That's just a configurable option present on the Homehub and isn't an indication of a static IP.

If you're a BT residential customer then you don't have a static IP.

You can set up a DDNS (Dynamic DNS) service that can mirror your dynamic IP to a static IP/Hostname.
Many of the free services offer hostnames like yourusername.ddnscompany.com

There are both free and paid for DDNS services you can sign up for.
I'm not sure which ones are compatible with the HomeHub.

There are also Windows/Linux/Mac DDNS programs if you can't find anything you like compatible with the HomeHub. They really need to be run on an "always on" machine to be effective though.

In reply to a post by broadbandman:

In reply to a post by PaulKirby:

I assume you don't have a Static IP, so you might have issues when you IP changes and BT do love to change your IP when you are not expecting it

How often does the IP change on FTTP usually? Is it the last digit or the whole range?

Its random, I have had an IP for as long as 3 months to as short as 2 weeks.

The sad thing is there is no way to know when its going to happen, the worst thing is when I am remote connected with files open and editing them, I have a few times lost several hours due to files locked open and when I closed them as root (admin) user the files was empty.

Paul

In reply to a post by broadbandman:

In reply to a post by PaulKirby:

I assume you don't have a Static IP, so you might have issues when you IP changes and BT do love to change your IP when you are not expecting it

Paul

Actually I might have a static IP, as in the homehub it says " dynamic DNS " off, and then i can switch it on and enter a user/pass?

Go to http://ipv6-test.com/ and copy your IPv4 address and in a command prompt run ping -a YOUR_IPv4_ADDRESS

*** Make sure the -a is in the above line ***

If it says something like the following:

Pinging hostXXX-XXX-XXX-XXX.rangeXXX-XXX.btcentralplus.com [XXX.XXX.XXX.XXX]

Then you have a dynamic IPv4 Address.

Paul

Don't worry about the BQM just enjoy the connection

In reply to a post by j0hn83:

That's just a configurable option present on the Homehub and isn't an indication of a static IP.

If you're a BT residential customer then you don't have a static IP.

You can set up a DDNS (Dynamic DNS) service that can mirror your dynamic IP to a static IP/Hostname.
Many of the free services offer hostnames like yourusername.ddnscompany.com

There are both free and paid for DDNS services you can sign up for.
I'm not sure which ones are compatible with the HomeHub.

There are also Windows/Linux/Mac DDNS programs if you can't find anything you like compatible with the HomeHub. They really need to be run on an "always on" machine to be effective though.

I ended up writing my own one due to I didn't want to install anything, So my DHCP Server sends a hello_message to our remote dedicated server every 60 seconds.

And if the IP has changed from what is stored on the dedicated server it changes the DDNS record in BIND and in another 60 seconds the new record is live, so you might just see a long thin red line between updates, unless it failed to update that is.

The hello_message is basically username, password, key (uuid), domain, hostname (ddns subdomain) which is sent over HTTPS (TLS) it also sends me an email when it changes too.

TBH, it could be dome better, but I wanted something done very quick there and then.

Paul

Its random, I have had an IP for as long as 3 months to as short as 2 weeks.

I wrote a script that pings the DDNS address of a client's router every hour to try and track this. Their BT IP address typlically changes every day, sometimes twice a day. If I knew it was going to be so unstable, I'd have recommended a static IP address as it means the remote CCTV system keeps dropping offline until the DDNS change ripples around the internet.

I suspect that the VDSL link is dropping and being re-established on a regular basis but as the BT routers don't have remote access and/or very good logging, it's difficult to check when it happens.

+1

It�s not VDSL.

Is there nothing in the technical log of the router to back up your theory ? Personally I�d guess if it were being �dropped regularly� then there�d be a lot more posts about it on here, and I�d be busier at work.

In reply to a post by Zarjaz:

It�s not VDSL.

Is there nothing in the technical log of the router to back up your theory ? Personally I�d guess if it were being �dropped regularly� then there�d be a lot more posts about it on here, and I�d be busier at work.

One would hope that FTTP is more stable than VDSL - I was just pointing out that changing IP on BT kit isn't unknown. But yes, that's with the BT Hubs which aren't the best bit of kit around in terms of line stability. Never seen a BT FTTP install - is it a separate modem and router set-up (like the older OpenReach white box) or do they have a combined fibre modem & router?

Fibre ONT that then connects to the router via Ethernet

VDSL2 service is cycling IP address daily has some serious stability issues and needs investigating.