upstreamban
An upstreamban is a network traffic control mechanism used to block or restrict incoming connections to a server or network by targeting upstream servers or networks. Unlike traditional firewalls that filter traffic at the local level, an upstreamban specifically targets the source of the traffic, often the upstream provider or intermediary servers that relay malicious or unwanted connections.
This technique is commonly employed to mitigate distributed denial-of-service (DDoS) attacks, spam, or other forms of
Upstreambans are typically implemented using tools like blackhole lists, BGP (Border Gateway Protocol) filtering, or DNS-based
While effective, upstreambans can sometimes lead to collateral damage if legitimate traffic from the same upstream