I cannot connect to zpool from one of my farms (one external IP):

Pinging sha256.mine.zpool.ca [198.50.152.135] with 32 bytes of data:
Reply from 198.50.152.135: Destination port unreachable.
Reply from 198.50.152.135: Destination port unreachable.

However I can do it from another IP in another farm. Everything is OK?