Here’s a way to confirm if there’s L3 connectivity between your device and TTN gws.
You need to know the IP of the TTN gw first, e.g. 52.169.76.203 for router.eu.thethings.network.
Open IP > Firewall, go to connections tab, shall be some on your wAP, as aparently you have default firewall programming. If this is not the case, you’ll need to check this on your border router connecting to internet.
Now click the funnel icon, and set it, (with 52.169.76.203 as IP) like
Here we can see a ping I’m running w/o any response (0 bytes reply), and two Sucesfully “stablished” connections with the TTN gateway IP (same port 1700 for msg upload and download) that sit established but idle (0/0 Rx/Tx bytes/s).
SACs stands for Seen Reply, Active, Confirmed, src-natted.
The three first flags (SAC) means there’s proper bidirectional communication.