default or selected kernelversion does not have config value CONFIG_IP_NF_MATCH_REALM.
Result is shown for kernelversion 5.4.123
realm match support
modulename: ipt_realm.ko
configname: CONFIG_IP_NF_MATCH_REALM
Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering (replaces ipchains)
└─>IP: Netfilter Configuration
└─>realm match support
In linux kernel since version 2.6.12
This option adds a `realm' match, which allows you to use the realm
key from the routing subsystem inside iptables.
This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
in tc world.
If you want to compile it as a module, say M here and read
Documentation/modules.txt. If unsure, say `N'.
key from the routing subsystem inside iptables.
This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
in tc world.
If you want to compile it as a module, say M here and read
Documentation/modules.txt. If unsure, say `N'.