CGNAT / NAT Behavior Checker

Enter your carrier NAT type, VPN configuration, and application type to understand session timeout risk, VPN keepalive requirements, and application impact. Produces a Low / Medium / High risk label, per-concern flags, VPN-specific advisory, and recommended keepalive interval.

CGNAT is pervasive on cellular networks and is often the root cause of VPN drops, NAT table timeouts, and broken ATM/POS sessions. This tool converts your configuration into a plain-English risk assessment with actionable recommendations.