Thanks for the link to that add-on -- I've been meaning to get something like that for a while!
I can ping the address just fine.
Pinging 75.126.184.52 with 32 bytes of data:
Reply from 75.126.184.52: bytes=32 time=55ms TTL=52
Reply from 75.126.184.52: bytes=32 time=63ms TTL=52
Reply from 75.126.184.52: bytes=32 time=53ms TTL=52
Reply from 75.126.184.52: bytes=32 time=56ms TTL=52
Ping statistics for 75.126.184.52:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 53ms, Maximum = 63ms, Average = 56ms
Their server is whack. Word.