topic Re: What is the subnet mask for the IP address presented by EE to a site. in Broadband & Landline

What is the subnet mask for the IP address presented by EE to a site.

Andy-lab — Mon, 10 Feb 2025 09:23:58 GMT

I work from home and have just switched from Plusnet to EE. Under Plusnet there was a "predictable" IPv4 address that my connection would present to a site, under EE it appears to float around on the 86.174.56.* and 109.146.206.* networks.

As I am doing a lot of work on the likes of AWS which has strict security access rules for parts of the system not open to the public, this has now become a pain.

Is there a list somewhere of the IP addresses that EE can present as that I should be using.

Re: What is the subnet mask for the IP address presented by EE to a site.

Ewan15 — Mon, 10 Feb 2025 09:56:11 GMT

@Andy-lab Hi You could register with a Dynamic DNS provider service that presents a consistent IP address to the outside world.

Re: What is the subnet mask for the IP address presented by EE to a site.

XRaySpeX — Mon, 10 Feb 2025 13:47:30 GMT

EE will allocate your public IP addy from a no. of pools of IP addys that are available to that ISP.

e.g. from 86.174.0.0 - 86.174.255.255 (United Kingdom Walton-on-thames Ip Pools) & 109.146.0.0 - 109.147.255.255 (United Kingdom Barnet Bt-central-plus) in the instances you quote. You could look these pools up in Whois

This public IP is liable to change every time your router re-syncs & can even jump from 1 pool to another. There is nowt you can do about it as EE only offers dynamic IPs of this ilk. You may need to find an ISP that offers static IPs. PN did offer static IPs for a fixed 1-off charge but does no longer.

Dynamic DNS will not help you. All it does is offer a consistent domain name for incoming requests to address you while hiding the underlying often varying IP addy that the ISP is assigning you. It does nowt to overcome your potentially changing IP when you make outgoing accesses to sites like AWS.

Re: What is the subnet mask for the IP address presented by EE to a site.

Ben570 — Mon, 10 Feb 2025 17:12:42 GMT

Does your work have a VPN with outbound internet access? Home broadband isn't ideal for having a consistent outbound IP address or range as you have found, but if just updating the AWS network ACLs is a pain then it might be worth seeing if your work has the option for a full tunnel VPN that you could connect to before accessing AWS so that your internet traffic goes out through the work/office IP address space. Just remember to disconnect from the VPN before doing any non-work browsing.