Just upgraded my internet service from DSL to Cable. So I went from a DSL modem to a Cable modem... obviously.. Are there any settings I should tinker with on this new modem for security or speed or anything? I asked the tech and he said nothing that he was aware of. I have the modem connected to my Extreme. I have the Moto SB6121? Forgot to add, there is also a security package included with Comcast. Do I need anything from that package? I never had anything prior to with DSL. Thanks.