http://airvpn3epnw2fnsbx5x2ppzjs6vxtdarldas7wjyqvhscj7x43fxylqd.onion/tags/port%20forward
Here's a packet capture I did from pfSense while running the TCP test, I set it level of detail to "Full":
20:00:06.108044 AF IPv4 (2), length 80: (tos 0x0, ttl 54, id 10076, offset 0, flags [DF], proto UDP (17), length 76)
188.166.175.60.59010 > XX.XX.XXX.XX.40756: [udp sum ok] UDP, length 48
20:00:11.284073 AF IPv4 (2), length 64: (tos 0x0, ttl 54, id 5974, offset 0, flags [DF], proto TCP (6), length 60)
188.166.175.60.53688 > XX.XX.XXX.XX.40756: Flags , cksum...