topic Impossible to fix Mobile Broadband not working with work VPN other providers OK in Mobile Broadband

Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Wed, 08 May 2024 16:48:27 GMT

Hi please can someone help I have literally tried everything I can problem is complicated by not being able to speak to EE directly due to contract being through third party who installed aeriel etc...

Rural location, poor land line broadband - 10Mbps/<1Mbps. Had aeriel and EE mobile broadband installed by third party. I get very decent speeds 60Mbps+/20Mbps on EE - delighted. Speed falls to hardly anything when I run work VPN (Cisco AnyConnect) making VPN unusable HOWEVER CONNECTING TO SAME VPN OUT OF HOURS and the speed is very good. Question throttling during office hours???

Have tried almost all possible configurations on supplied TP-Link MR600 e.g. disabled SmartConnect, turned off IPv6, different bands etc however a lot of settings e.g. port forwarding , static IP etc... are not configurable or have no effect as locked by arrangement between third party supplier and EE.

This is the killer... through the supplier I can try Three and O2 AND BOTH NETWORKS WORK WITH MY WORK VPN FINE but average speeds are generally slower 30Mbps/20Mbps than through EE who I am keen to stay with..

There's no sign of fibre so 4G broadband is my only reasonable option other than Starlink which is a bit pricey. I could change the router at my own cost I spose but reluctant to do that.

Can some one who really knows why this is happening advise urgently please??? Clock is ticking with supplier for me to resolve.

Many thanks in a lot of desperation.

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Wed, 08 May 2024 16:54:00 GMT

Forgot to say if I turn router firewall off VPN during office hours works fine over EE - obviously I am unable to leave it off.

Thanks

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

James_B — Fri, 10 May 2024 11:00:08 GMT

Hi @SJMUK007,

Have you tried reaching out to your VPN provider to see if they're aware of any issues using their service during peak times?

James

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Fri, 10 May 2024 11:55:18 GMT

Thanks - I've searched various forums but not directly contacted the VPN provider, the VPN is run through my work and the IT dept have been involved and can't see a problem. We are a v large organisation and they have not seen this before.

Still hoping for an answer on this forum 😞 though looking unlikely.

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Sat, 11 May 2024 10:10:13 GMT

IT appears to be CGNAT used by EE preventing static IP address use. I'm going to have to switch to another provider. Appauling.

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

XRaySpeX — Sat, 11 May 2024 11:56:07 GMT

CGNAT wouldn't make a working configuration run a diff speeds throughout the day. It would stop a particular configuration working completely. Where are you using a static public IP?

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Sat, 11 May 2024 12:51:35 GMT

Hi thanks for reply. My work VPN is the issue and an IP might be needed (no idea why out of hours is better might be red herring) I am able to connect with ok speed using O2 and Three SIMs provided by broadband installer. As soon as I use EE SIM the VPN crawls <0.1Mbps. But I get 70Mbps+ on EE off the VPN normal internet so keen to stay EE. O2 and Three don’t use CGNAT so can only think this is the cause and mentioned in lots of forums. Pls help 🙂

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

XRaySpeX — Sat, 11 May 2024 13:30:37 GMT

O2 do use CGNAT. I'm on it now.

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Sat, 11 May 2024 14:00:20 GMT

Ok are u looking in to it further please?

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Sat, 11 May 2024 15:15:47 GMT

Exact same issue but not resolved. https://community.ee.co.uk/t5/Archived-Posts/Slow-speed-4G-wifi-through-a-vpn/td-p/1046385

Re: Impossible to fix Mobile Broadband not working with work VPN other providers OK

SJMUK007 — Sun, 12 May 2024 11:09:53 GMT

I said it was impossible to fix! I can't believe EE don't know what's causing this given the number of other unresolved identically described issues on other forums. It seems like a network change was made last year which introduced this problem.

I've got the opportunity to use EE which has a cracking speed reaching 80Mbps+ at times (for me in a rural location this is a revelation) but I am going to have to settle for one of the other providers with speeds averaging around the 20Mbps level.

I hope EE understand how disgruntled I am. If anyone else can help PLEASE reply.

Thanks