I just set up a MultiTech Gateway to forward packets to TTN, following the tutorial on the wiki. My gateway did not show up through the API, but after investigation I saw the TTN server's IP changed to 54.72.145.119. After the configuration change and a packet forwarder restart it still does not work.
Doing a tcpdump on the gateway I get the following:root@mtcdt:~# tcpdump -i eth0 -n host 54.72.145.119
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:11:53.412834 IP xxx.89.15.184.57279 > 54.72.145.119.1700: UDP, length 12
10:11:53.433940 IP 54.72.145.119 > xxx.89.15.184: ICMP 54.72.145.119 udp port 1700 unreachable, length 48
If I read this result correctly I come to one of two possible conclusions:
1. The TTN server is currently offline and therefore not responding to requests sent to it on port 1700 UDP.
OR
2. There is a firewall between me and the TTN server blocking UDP communication on port 1700.
Number 2 is quite possible because I'm sitting on a university network where the IT department may be blocking ports for security reasons. Will someone please confirm my suspicion before I contact our IT department?
If the IT department is unable or unwilling to allow this port through, is there another port, or another way I can connect my gateway to the TTN network?