2 ms·

I am not that much into mobile. Does TCP have the same difficulty?

• papaf 6y ago
  No, as long as the connection is initiated by the mobile device, TCP is much easier.
• toast0 6y ago
  TCP, especially on well known ports 80 and 443 is almost definitely going to work, if the network is going to allow any traffic. UDP might be blocked, and there's no well known ports more likely to work than others. Other than that, NAT timeouts for UDP are probably a lot lower than TCP, so you likely need to ping more often to keep things active (but you should track this by network and adjust accordingly)