Be aware! gminer 2.67 trying to connect 3rd-party IP - 81.4.110.148 at start. If you will try to deny this connection with Firewall - miner will not start. I've opened issue on the official github page, but still no answer from devs.
It's not devfee pool IP. It's some unknown suspicious IP to which private information can be transmitted from your PC.
p.s. Gminer 2.66 works perfect with block all ips except of my Pool's IP.
Why do you have any info on your mining rig?
Rig should only be for mining. As for access to ip its usually for dev pool update / check for miner update.