✋ node operators enable a ban list

Node operators who use this list should subscribe to Boog900/monero-ban-list updates so that a new version can be added when changes are made to the list.

It removes the spy nodes from network so they cant do a timing attack (If one spy node receives a transaction unseen by the 100s of other spy nodes, they can logically deduce that the first instance seen was the originator of the transaction/block). The current list above has a parsing error for the subnets (IPs with 0/24) and those are important because each single subnet contains 256 possible IPs. These possible IPs are fully actively being utilized for the attack as I have seen first hand. I hope Boog900 or one of the list maintainers can address this parsing error somehow so I can remove my temporary fixed list. This could be somehow a personal error somehow but most probably these unparsed subnets are a unnoticed issue.

explain the need of a ban list? And how it works?

Adding the ban-list to your Monero GUI wallet or your Monero node prevents connections from being made to other nodes that are suspected of harming the Monero network. You don't have to add a ban list, it's voluntary, just an official recommendation. But everyone who adds a ban-list contributes to the security of Monero.