1. What cable modem models can be modified? While other models may be uncapped Theoryshare supports only the Motorola Surfboard. SB3100 – SB5100…. On November 21st I’ll be at Salvador speaking on “Hacking cable modems: The Later Years”. It’s not a talk about theft of service and getting free…. ARRIS Cable Modem/Gateway Security Lapse Offers…