2 Rigs, same network, only 1 connects to pool?

[Fattox]

Just a quick question really. I've been mining for months now but never come across this before.

I have 2 identical rigs on the same network, one can connect to vertco.in right now, but one says the pool is dead (but switches to another pool without issue). Rig is working on another pool just fine and can ping vertco.in ... and it was mining there earlier with no problem, issue just came around today.

Anybody have any idea how/why this could even occur?