No TCP connectivity when roaming (network-operators Orange B | KPN))

[LucSkywalker]

Hi,

I am using OpenVPN without any problems (server on Synology and clients on Android/Windows 10) when I am in my home country (the Netherlands) for some years now :
- using an Android phone and the Android OpenVPN client - works OK!
- using a PC OpenVPN client connecting through the Android phone's Mobiel hotspot - works OK!
- reaching my Synology login webpage (https) - works OK!
My network operator is KPN

BUT...
when I am traveling abroad, at the moment roaming from Belgium, using Orange B | KPN something goes wrong.
- I am still able to connect (phone/PC) to my OpenVPN server
- I am able to sent and receive ICMP Ping requests and replies.
- I am able to traceroute

But unfortunately I am not able to connect to my Synology login web-page (https) or any other service on my Home network when I am abroad...
So something goes wrong using TCP ... ???

When I am using some WiFi network abroad everything works as as expected.

Any help is appreciated.

Cheers
Luc

[TinCanTech]

Sounds like a network conflict:
https://community.openvpn.net/openvpn/w ... gConflicts

Please see:
viewtopic.php?f=30&t=22603#p68963

[LucSkywalker]

Hi,

Thank you for your quick response!

In my configuration:

My home network uses: 172.22.0.0
The Android built-in hotspot uses: 192.168.43.0
The Synology OpenVPN configuration uses: 10.8.0.0

I'll try to change (one of) the last two networks (in the subnets list one should try to avoid).

I will report back in due course whether the problem has been solved with that. Thank you again for your help.

Regards,
Luc

[TinCanTech]

My home network uses: 172.22.0.0
The Android built-in hotspot uses: 192.168.43.0
The Synology OpenVPN configuration uses: 10.8.0.0

I guess it is not a network conflict ..

will report back in due course

[Pippin]

Long shot, try

Code: Select all

mssfix 1400

in the client config.