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Linux kernel rp_filter settings (Reverse path filtering ) Submitted by Sarath Pillai on Thu, 02/28/2013 - 00:38 The main functionality of a router is to route packets from one place to another. Understanding the rp_filter modes and log_martians in Linux May 02, 2018 Reverse Path Filtering - Linux Documentation Project Going by the example above, if a packet arrived on the Linux router on eth1 claiming to come from the Office+ISP subnet, it would be dropped. Similarly, if a packet came from the Office subnet, claiming to be from somewhere outside your firewall, it would be dropped also. The above is full reverse path filtering. linux - Disabling rp_filter on one interface - Server Fault I have an Ubuntu 16.04 Server which is acting as a router with multiple (VLAN) interfaces. By default, rp_filter (reverse path filtering) is enabled for all interfaces. I want to keep it that way, but make an exception for exactly one interface.

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Oracle Linux 5.6 (Enterprise Linux 5 Update 6) includes a fix using initscripts-8.45.33-1.0.4.el5.i386.rpm, which sets the kernel parameter net.ipv4.conf.default.rp_filter to 2 (relaxed mode). After you apply Unbreakable Linux Kernel on top of Oracle Linux 5.6, you may not need to make manual changes, because the rp_filter value of all the NICs linux - Finding out the values of kernel options related

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