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XCCDF
Guide to the Secure Configuration of SUSE Linux Enterprise 15
System Settings
Network Configuration and Firewalls
Kernel Parameters Which Affect Networking
Network Related Kernel Runtime Parameters for Hosts and Routers
net.ipv4.conf.all.rp_filter
net.ipv4.conf.all.rp_filter
An XCCDF Value
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net.ipv4.conf.all.rp_filter
Enable to enforce sanity checking, also called ingress filtering or egress filtering. The point is to drop a packet if the source and destination IP addresses in the IP header do not make sense when considered in light of the physical interface on which it arrived.