OpenDNS client (device) won't connect to router on some public WiFis?

[JaimeZX]

Sort of Merlin-WRT related...

I've found that sometimes when I connect to a public wifi with my phone, it will fail to connect to the OpenVPN server on the router. If I disconnect from the wifi and use the cell network, it connects just fine. Which is cool except if I'm in one of the many grocery stores that weirdly have no cell reception.

If I go to the web browser to see if I have to click an [X] Agree to Terms before it works, that's usually not the issue, and the [unsecure] internet works fine. So I can only assume that some public wifis have a way to block VPN services?

A) Is that assumption accurate?
B) Is there a way around it?

Thanks much you guys.

 

[Odkrys]

what's your port? use tcp 443 it probably work unless they block vpn protocol like china.

 

[JaimeZX]

Yeah, I see. I was using the default 1194. Two questions:

1) If I change the VPN port on the router, will I have to generate a new .ovpn file? Or should the phones work without change?
2) Will changing the port in the router break HTTPS somehow, or have other unintended consequences?

Thanks much!