ISP Toolkit tools
Operator-scale planning: MTU and MSS, CGNAT port block sizing, DHCP pool capacity, subscriber growth and oversubscription modelling.
CGNAT Port Block Planner
Plan carrier-grade NAT: how many subscribers fit behind a public pool, how large each port block should be, and the logging volume it will generate.
MTU / MSS Calculator
Calculate the effective MTU and correct TCP MSS for any stack of encapsulations, so tunnelled traffic stops hanging on large packets.
Subscriber Capacity & Oversubscription Calculator
Model how many subscribers an uplink really supports using peak-hour concurrency and average usage, rather than a contention ratio someone invented.