Firewall Rules Air Force Capt. Justin Valentine, Tech. Sgt. Michael Markus, and Airman 1st Class Brian Stahl investigate and configure firewall rules for a training scenario as part of exercise Tacet Venari at Ramstein Air Base, Germany, March 8, 2019. SHARE IMAGE: Download Image: Small (0 KB)| Medium (256 KB)| Full Size (0.51 MB) Photo By: Air Force Master Sgt. Renae Pittman VIRIN: 190308-F-FF603-0019C.JPG Photo Gallery