I still using the gateway A400, for the first installation I facing the problem is TFTP server connection failure. I have PING to my TFTP server, for the first sequence packet I sent was lost. the next going sequences is fine.
Request timed out.
Reply from 22.214.171.124: bytes=32 seq=1 time=10mS TTL=119
Reply from 126.96.36.199: bytes=32 seq=2 time=20mS TTL=119
Reply from 188.8.131.52: bytes=32 seq=3 time=40mS TTL=119
—- PING Statistics for 184.108.40.206: —-
Packets Sent = 4, Received = 3, Lost = 1 (25 Percent Loss)
Approximate round trip times in milli-seconds:
Minimum = 0mS, Maximum = 40mS, Average = 23mS
I have scanning using port scanner from both sides (source and destination) from source scanning is no problem, but not from destination sites.
Have you facing this problem, I have checked with our ISP it seen no port filtering.