Sponsored

Three Home-Fi & CGNAT

nickcal

Casual Member
I recently signed up for the Three Home-Fi unlimited package. I haven't used the router provided as I already had a Huawei 5186 setup - so I just swapped SIM cards.

Today I was trying to get dynamic DNS and port-forwarding working to allow me to access a few CCTV cameras I have.

I don't seem to be able to get it work. Having looked around forums it looks like it could be a CGNAT issue? But if Three are pitching the Home-Fi product as a broadband replacement - so this would be an issue if it is the case.

Anyone else on Home-Fi managed to solve this problem? I have seen work-arounds using L2TP - but that is another monthly cost I would like to avoid...

ta
 

Mark.J

Administrator
Staff member
ISPreview Team
Sadly CGNAT is also a problem with some fixed line broadband providers too, although the degree to which it negatively impacts end-users often depends upon the system being used. In any case getting around it can sometimes be a bit tricky but the first "port of call" (pun intended) should be to contact Three and ask them if they can resolve the problem on their end.

Failing that you could always try a cheap VPN service like NordVPN, although whether or not this works may depend upon the setup of your cameras (if you're trying to host the cameras yourself over this connection then that's not really ideal for a consumer mobile plan or cheap VPN).

Another option you could try is the free plan from ngrok, which essentially "tunnels" your connection to the cameras through a third-party server. This is actually more designed for when your connection is acting as a server for something but I think in theory it should work for getting around CGNAT more generally. As it's free you've nothing to lose by trying.

 

nickcal

Casual Member
I think I managed to get it working!

The Three 4G router (Huawei) was connected to a Unifi USG router (the old BT line also connected as backup). When I put the WAN IP from the USG into the Huawei routers DMZ option and setup dynamic DNS from the USG - it worked!!

Ideally both of the routers (BT and Three 4G) would be configured a Bridges. I managed to get the BT connection configured as a bridge, but it was an old HH5a using OpenWrt and the connection was 1/3 slower that the new BT SmartHub. I guess this is something to do with support for vectoring, g.inp, etc. ? However, I have no idea (and doubt) whether the Home-Fi would support a bridge mode! There is firmware for the 5186 available to provide bridge capability - I will try my luck with Three support!

Failing that I will try the options suggested, many thanks for those...
 

nickcal

Casual Member
An update, I have managed to flash the Huawei E5186 I am running with firmware that enables bridge-mode. This forum gives the details link.

The router is now just a 4G modem. I have a ubiquiti USG router which now get the IP address. The dynamic DNS function of the USG works really well and I can do port-forwarding for CCTV etc.

The Three Home-Fi solution is proving to be really good. I have kept my BT FTTC as a backup, but so far I haven't needed it. It seems to offer a very credible home broadband option, with unlimited data for £22/month, at a good price point.

My next challenge is to install the external antenna!
 
Top
Promotion
Cheapest Superfast ISPs
  • Hyperoptic £18.00 (*22.00)
    Avg. Speed 30Mbps, Unlimited
    Gift: Code: SPRING19
  • Vodafone £21.00 (*23.00)
    Avg. Speed 35Mbps, Unlimited
    Gift: None
  • TalkTalk £22.50
    Avg. Speed 36Mbps, Unlimited
    Gift: None
  • Direct Save Telecom £22.95 (*29.95)
    Avg. Speed 35Mbps, Unlimited
    Gift: None
  • SSE £23.00 (*33.00)
    Avg. Speed 35Mbps, Unlimited (FUP)
    Gift: None
Prices inc. Line Rental | View All
Helpful ISP Guides and Tips
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
»
Promotion
The Top 20 Category Tags
  1. BT (2369)
  2. FTTP (1920)
  3. FTTC (1568)
  4. Broadband Delivery UK (1529)
  5. Politics (1306)
  6. Openreach (1306)
  7. Business (1153)
  8. Statistics (1019)
  9. Mobile Broadband (943)
  10. FTTH (925)
  11. Fibre Optic (924)
  12. Ofcom Regulation (858)
  13. Wireless Internet (852)
  14. 4G (823)
  15. Virgin Media (791)
  16. Sky Broadband (565)
  17. TalkTalk (546)
  18. EE (539)
  19. Vodafone (453)
  20. Security (389)
Sponsored

Copyright © 1999 to Present - ISPreview.co.uk - All Rights Reserved - Terms  ,  Privacy and Cookie Policy  ,  Links  ,  Website Rules