Friday, January 15, 2021

CGNAT vs NAT

With IPv4s being expensive and hard to come by. I had some questions about carrier grade NAT. I have tested a IPv6 only network and found several issues with using strictly IPv6 being an ISP. Some web sites only being IPv4, routers with IPv6 stack not enabled by default, routers not accepting certain prefix sizes, roku no ipv6 stack, etc. The only realistic way I can see based on what I have read is to run dual stack (IPv4 & IPv6) simultaneously. For IPv4 hand out customers private IPv4 addresses. Several distributors sell CGNAT capable equipment. What features and functionality do these CGNAT have over normal NAT that you would find on a consumer level router.



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