iOS 10 'Network is unreachable’ via T-Mobile, WiFi fine

[BeePeeEn]

I can’t connect to my router’s OpenVPN over cellular using OpenVPN iOS app. All works fine over WiFi.

I thought it might be T-Mobile blocking port 1194 so I changed the server port to 443 and uploaded a new profile but getting the same results.

Router doesn’t show connection attempts, so looks like it is blocked prior to hitting the router...

Any suggestions?

iOS 10
T-Mobile
OpenVPN 1.0.7

iOS client logs below (IP redacted)

2016-09-16 10:39:21 ----- OpenVPN Start -----
OpenVPN core 3.0.11 ios arm64 64-bit built on Apr 15 2016 14:13:50
2016-09-16 10:39:21 Frame=512/2048/512 mssfix-ctrl=1250
2016-09-16 10:39:21 UNUSED OPTIONS
12 [resolv-retry] [infinite]
13 [nobind]

2016-09-16 10:39:21 EVENT: RESOLVE
2016-09-16 10:39:21 Contacting ###.###.###.##:443 via UDP
2016-09-16 10:39:21 EVENT: WAIT
2016-09-16 10:39:21 SetTunnelSocket returned 1
2016-09-16 10:39:21 Transport Error: UDP connect error on ‘###.###.###.##:443' (###.###.###.##:443): Network is unreachable
2016-09-16 10:39:21 Client terminated, restarting in 2...
2016-09-16 10:39:21 NET Internet:ReachableViaWWAN/WR t------
2016-09-16 10:39:21 NET WiFi:NotReachable/WR tc-----
2016-09-16 10:39:23 EVENT: RECONNECTING
2016-09-16 10:39:23 EVENT: RESOLVE
2016-09-16 10:39:23 Contacting ###.###.###.##:443 via UDP
2016-09-16 10:39:23 EVENT: WAIT
2016-09-16 10:39:23 SetTunnelSocket returned 1
2016-09-16 10:39:23 Transport Error: UDP connect error on ###.###.###.##:443' (###.###.###.##:443): Network is unreachable
2016-09-16 10:39:23 Client terminated, restarting in 2...

[TinCanTech]

UDP:443 is not HTTPS .. try TCP:443

[BeePeeEn]

Thanks, I changed to TCP and am getting the same results...

Transport Error: TCP connect error on ‘###.###.###.##:443' (###.###.###.##:443): Network is unreachable

[BeePeeEn]

I just got it working. Turns out it was the bad T-Mobile carrier settings. That was a nice waste of several hours!

https://www.cnet.com/news/t-mobile-warns-dont-update-your-iphone-to-ios-10/

Thanks for the help TinCanTech.

[TinCanTech]

Over Priced Apple Garbage ..

Thanks for that link.

[drtrt]

Hi I just updated to newest ios 10.2 and before the update, I had no issue with connecting to my home Netgear R7000 router through OpenVPN. Now the network is always unreachable. The port I'm using is the default 12974, and no luck. It works on WiFi and through Verizon MiFi. Any ideas?

[BeePeeEn]

I had the exact same issue.
Fails on cellular and works on wifi.

Seems to have cleared up. But I'm on another network than T-Mobile at the moment.