Allow/Deny IP Ranges by Specifying if they are Public/Private

[nisdas]

🚀 Feature Request

Description

Instead of listing out all the specific IP subnets for different ranges of private addresses we can instead just provide a flag to denote this. Thanks to @hanswurst37 for raising this up in #5663 .

Describe the solution you'd like

--p2p-allowlist=public or p2p-denylist=private

A user could provide a string public / private to our current allowlist/denylist flags. We simply have to supply the subnets to our connection gater and it will filter it out for us.

[DigiDr]

Agree this would be very helpful! Perhaps Prysm could provide also provide a default list as some users will find this challenging to understand and cope with.

[kevlu93]

will take a look into this