This paper explains how the GEMSIS access issue in Nautilus environments was resolved after months of troubleshooting. The root cause was identified as IP-based access restrictions at the Akamai layer, where external NAT’d IP addresses (not internal ones) needed to be whitelisted. Through collaboration with Defense Information Systems Agency, Akamai, and Navy teams, the correct external CIDRs were identified and added, restoring access across all connection types. The experience improved team coordination, troubleshooting strategies, and understanding of hybrid cloud networking, reinforcing the importance of communication and adaptability in resolving complex cybersecurity issues