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That's only true if you aren't behind CG-NAT. If you are, your firewall can port forward all it wants but it won't matter, the ISP would have to also port forwa
by ReK_ 2y ago
That's only true if you aren't behind CG-NAT. If you are, your firewall can port forward all it wants but it won't matter, the ISP would have to also port forward to you.
- vetinari 2y agoEven in this situation, your ISP can port forward to you. While not universal, some ISPs support PCP, where you can ask for a port mapping to your CGNAT-ed IP and port. They might or might not honor the external port (if it is taken, they obviously cannot), but you will get some hole punched.
- doublerabbit 2y ago> your ISP can port forward to you But will they? Domestic ISPs are pretty hesitant to offer such, or anything at that manner.
- vetinari 2y agoSome do. But when they don't, it is not a fault of CGNAT - which does provide the capability -- but a fault of specific ISP, that's not willing to use it.