Reports the maximum number of connections this gateway's connection table is configured to hold. This is the hard ceiling that determines when new connection attempts start failing outright rather than merely getting queued, so an admin sizing this value too low relative to real peak traffic, as revealed by fwPeakNumConn, directly causes legitimate new connections to be refused during busy periods. Example: raising fwConnTableLimit ahead of a known seasonal traffic increase, based on last year's fwPeakNumConn, is how an admin proactively avoids repeating a connection-exhaustion incident.