topic Re: Request: Public IP APN (O2 Details) in Tech Support

Request: Public IP APN (O2 Details)

Comben — Sun, 26 Jun 2022 20:16:40 GMT

Hi O2 community,

I recently bought an O2 sim card to use as my main internet and asked the sales staff member if O2 use public IP addresses for mobile data. (I was asking so that I can game on xbox or even work from home on my work’s secure network.)

They assured me O2 use public IP addresses for mobile data but that they don’t provide a static public IP address. That would be fine for me because usually the IP address won’t change during a session while using the data at a fixed location - It just needed to be a public IP. The sales advisor also said to speak to customer services if I have any problems with the connection.

Now that I have the sim, I’m realising that O2 don’t seem to use public ip addresses because my WAN is showing as 10.xx.xx.xx which is a private IP address and restricts my ability to game/ work from home.

From my understanding with forum + google searches, there is a way to get a public IP address which involves potentially using a VPN (I believe I saw a post from MI5 on the forums here, but this was resolved via private message. See here)

So my question is: Am I able to use a different O2 APN that is capable of offering a public IP address so that I’m able to game and log onto my work computer remotely? (maybe using a VPN)

Thanks for any help you are able to offer and sorry to waffle, it means so much to me because I live in a residential area that somehow doesn’t have cable broadband so I’m reliant on my mobile data.

Re: Request: Public IP APN (O2 Details)

MI5 — Sun, 26 Jun 2022 20:57:29 GMT

@Comben

Short answer is that you need an O2 Business account to get a public ip address without using a vpn service.

Re: Request: Public IP APN (O2 Details)

Comben — Sun, 26 Jun 2022 21:15:21 GMT

Thanks for such a prompt answer. Although I feel a little let down by the agent mentioning that O2 use public IP addresses for all mobile data. Is it worth cancelling my contract within the 14 days or should I try speaking to someone first?

Also in reference to my previously quoted web address do you happen to know how that person’s problem was resolved? I saw a mention of vpn.o2.co.uk and also tried to read the pdf referring to GPRS and 3G VPN but wasn’t privy to the resolution that they got via private message.

I’m really hoping O2 can help me out in some way because I’m in such a pickle, without the sim card we have no internet (I’ve been so annoyed at Open Reach/ Virgin because somehow my flat doesn’t have cable broadband connected although all the houses next to us have the new fast cable to property.) So I truly hope something can be done as internet is something most of us take for granted these days because of how much it’s used.

Re: Request: Public IP APN (O2 Details)

MI5 — Sun, 26 Jun 2022 21:59:24 GMT

@Comben

I'll ask @O2Georgina to contact you in the morning as unfortunately I have now idea how or if the previous post was resolved.

Re: Request: Public IP APN (O2 Details)

Comben — Sun, 26 Jun 2022 22:15:37 GMT

Thanks so much, lets keep our fingers crossed they’ll be able to help.

As a side note, I have seen your name across so many posts on the community boards and want to personally thank you for the time and effort you put in. It’s appreciated a great deal and when I originally posted I really hoped you would reply, so thanks again for your prompt and helpful messages.

Re: Request: Public IP APN (O2 Details)

MI5 — Mon, 27 Jun 2022 07:04:40 GMT

No problem @Comben

Hope you get sorted 👍

Re: Request: Public IP APN (O2 Details)

Comben — Tue, 28 Jun 2022 13:49:45 GMT

Hi again, just wanted to check in regarding timeframes because as yet I haven’t heard from O2 regarding this?

I only ask due to the fact I’m coming to the end of my 14 day cooling off period and may need to switch networks if I’m unable to sort out a public IP address. Thanks again and sorry to bother you.

Re: Request: Public IP APN (O2 Details)

madasaf1sh — Tue, 28 Jun 2022 16:00:37 GMT

@Comben

This should not be happening as you should be presented with a Gateway IP of for example 82.132.244.0/22 as I see on my o2 devices (or any of the Public Gateway IP's assoiciated with the o2 ASN35228)

What do you see when you use a web browser and do a whatsmyip in google?

Most networks now operate CGNAT which means all traffic is double NAT'd

Internal Private -> Carrier Private IP - Gateway IP

Some hardware will only report the Carrier Private IP, as that is the next hop...

CGNAT is garbage for Gaming, and to be honest you probably need to look at the likes of AAISP and their fixed IP sims or the ilk, as its a niche product.. Or hope o2 introduce IPv6

Re: Request: Public IP APN (O2 Details)

Comben — Tue, 28 Jun 2022 22:30:37 GMT

Thanks for the reply madasaf1sh, yes to access the internet and sites such as whatsmyip, O2 does assign a public IP address. However as you mentioned O2 only does this after first assigning a private IP address or CGNAT which is where my issue stems from, as it hinders console gaming and connections to remote secure servers used when I work from home to access internal financial systems.

I have now come to understand that some carrier networks use CGNAT such as Vodafone but I thought with O2 being such a prolific carrier they wouldn't use it and I was even assured by the O2 representative that O2 use public IP addresses for their mobile data so I'm kind of annoyed by the fact I wasn't told the truth. I also believe some network providers can, under special circumstances, issue a dynamic range of IP addresses to a customer depending on their needs which is why I've come to these community pages.

I have done quite a bit of research into this and found an old O2 article linked by MI5 in the recent past which talks about using some sort of O2 VPN APN to solve some of the issues I'm taking about. However this particular case was concluded via private message and I was wondering what their solution was. (Old thread listed here for reference)

Thanks again for your reply, I hope what I've said all makes sense and do also apologise about all the messages especially when the simple answer is just to accept the CGNAT. But you have to know my back story as to why I care so much because I live in a very residential area yet somehow don't have cable broadband when my neighbours do. (It's so bizarre and all the ISP's I've contacted can't believe it) This means I'm so reliant on the O2 mobile network to help me and my family access the internet, work from home and enjoy my hobby of gaming. It may sound cliche but I honestly believe we can't live without good internet so I'm trying all I can to make this situation work for me and my family.

Re: Request: Public IP APN (O2 Details)

lewys-gp — Tue, 05 Jul 2022 10:40:45 GMT

Hi, @O2Georgina. Is it possible for you to drop by and assist the OP further, please? Thanks!

Re: Request: Public IP APN (O2 Details)

O2Georgina — Tue, 05 Jul 2022 10:55:40 GMT

Thanks for the tag @lewys-gp

@Comben I will send you a Private message now

Re: Request: Public IP APN (O2 Details)

Lukeishere02 — Sun, 05 Feb 2023 16:19:12 GMT

can the method to resove this be posted on here please as i have the same issue and cant port forward due to this @O2Georgina

Re: Request: Public IP APN (O2 Details)

Lukeishere02 — Sun, 05 Feb 2023 16:19:57 GMT

@Comben did this get fixed ??

Re: Request: Public IP APN (O2 Details)

madasaf1sh — Sun, 05 Feb 2023 16:30:56 GMT

@Lukeishere02

It cant be done on o2 due to CGNAT been used across all segments of the o2 network, which means you are double NAT'd.

Their are 3 options 1 of which will not be acceptable to Consumers as it requires a Private APN, where o2 route data through an Enterprises Network..

The other is to create a L2TP tunnel between the application and the device accessing said application.

As I said back in 2022, there are some niche MVNO's that offer a Public IP either IPv6 or v4 but they are expensive and not on o2, AAISP do one... https://www.aa.net.uk/voice-and-mobile/data-sims/

Re: Request: Public IP APN (O2 Details)

Lukeishere02 — Sun, 05 Feb 2023 16:46:13 GMT

@madasaf1sh im on a O2 business so would i be able to get option 1 i have had some sort of vpn turned on my sim and other options but they did not send me any info on how to use this (vpn.o2.co.uk)

Re: Request: Public IP APN (O2 Details)

madasaf1sh — Sun, 05 Feb 2023 17:21:57 GMT

Option 1 costs upwards of £10,000 to establish a Private APN, this is the infrastructure you would need in place, as well as an Enterprise Contract, and not just a business contract. and its not really viable if you only have under 500+ phones...

I have never come across that APN (vpn.o2.co.uk) its not pingable / reachable

Re: Request: Public IP APN (O2 Details)

Comben — Sun, 05 Feb 2023 22:56:47 GMT

@Lukeishere02 In answer to your question to me, I never got my original issue sorted, O2 customer service were completely useless and often didn't or couldn't help. I eventually spoke to a person who told if I was an O2 business customer they could do it so I looked into switching to O2 business but every time I rang then they would pass me off to another team or disconnect me when transferring making me go through the whole process three or four times before I gave up. I will be ending my contract as soon as the year is over because it's of no use to me and no one at O2 customer services can/ will help.

Re: Request: Public IP APN (O2 Details)

Comben — Sun, 05 Feb 2023 23:04:56 GMT

As a side note the O2 community and Community Managers are really helpful and are pretty much the main reason I didn't cancel my contact in the cool off period. Also worth nothing the O2 aren't partially forward with this knowledge which was the biggest frustration, I understand it's not possible but be upfront and train your staff to let them know and maybe make exceptions for certain people depending on individual scenarios. (I don't know, maybe they can't do anything at all but it was handled so poorly it left a bad taste in my mouth)