原文地址:反向路径过滤——reverse path filter 作者:pwp_cu 反向路径过滤——reverse path filter 一.原理先介绍个非对称路由的概念参考<Understanding Linux Network Internals>三十章,30.2. Essential Elements of RoutingSymmetric routes and asymmetric routesUsually, the route taken from Host A to Host…