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Does IPv6 use port numbers?
Port restrictions for IPv6 are identical to those available in IPv4. TCP and UDP have separate port spaces, each identified by port numbers in the range 1-65535. For IPv6, ports work the same as IPv4. Because these are in a new address family, there are now four separate port spaces.
Can you NAT IPv6?
IPv6 NAT helps to translate IPv4 addresses to IPv6 addresses of network devices. IPv6 NAT also helps to translate the address between IPv6 hosts. IPv6 NAT supports source NAT, destination NAT, and static NAT.
Is Nat needed anymore?
In IPv4, NAT (technically NAT overload or NAPT) is required for multiplexing due to the shortage of addresses. In IPv6 we have 340 trillion, trillion, trillion addresses available, and therefore no need for address sharing.
Are there any implementations of Nat for IPv6?
Nat for ipv6 is strongly discouraged by IETF. nevertheless there are implementations out there if you really want it. For example linux added it in version 3.7. The Linux implementation works in basically the same way as the Linux NAT implementation for IPv4. I can’t speak to other implementations.
How does IPv6 solve the address shortage problem?
Ipv6 solves the address shortage, it goes some way to solving the problem of ISP-independence by allowing you to run public and private addresses in parallel (though that creates issues of it’s own). Privacy extensions hide which computer on a subnet is making a request but they don’t hide what subnet it is on.
Why do we need Nat in the network?
NAT was designed and deployed (widely deployed) in order to cope with the scarcity of free IPv4 addresses. Without NAT, the IPcalypse would have already destroyed civilization (or triggered IPv6 actual usage, maybe).
Which is more secure NAT or public address?
NATs are not really magically more secure than public addresses (and have a lot of nasty warts of their own, due to the nature of address translation). To route to your private ipv4 address, an attacker simply needs to point at your router, and then it’s entirely up to the firewall to filter out that traffic.