Reverse Path Filters are generallytypically used to disable asymmetric routing where an IP application has a different incoming and outgoing routing path. Reverse path filtering is a Linux Kernel feature. So major functionality is to prevent packet entering from one interface leaving via the other interfaces. Reverse-path Filtering is a feature of the [[Linux Kernel]], but Reverse-path forwarding(RPF) is the protocol of the IP [[multicast]] routing. <ref> https://www.theurbanpenguin.com/rp_filter-and-lpic-3-linux-security/</ref>
