default or selected kernelversion does not have config value CONFIG_WAN_ROUTER_DRIVERS.
Result is shown for kernelversion 6.2.5
WAN router drivers
configname: CONFIG_WAN_ROUTER_DRIVERS
Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wan interfaces support
└─>WAN router drivers
In linux kernel since version 2.6.12
Connect LAN to WAN via Linux box.
Select driver your card and remember to say Y to "Wan Router."
You will need the wan-tools package which is available from
<ftp://ftp.sangoma.com/>.
Note that the answer to this question won't directly affect the
kernel except for how subordinate drivers may be built:
saying N will just cause the configurator to skip all
the questions about WAN router drivers.
If unsure, say N.
Select driver your card and remember to say Y to "Wan Router."
You will need the wan-tools package which is available from
<ftp://ftp.sangoma.com/>.
Note that the answer to this question won't directly affect the
kernel except for how subordinate drivers may be built:
saying N will just cause the configurator to skip all
the questions about WAN router drivers.
If unsure, say N.