default or selected kernelversion does not have config value CONFIG_IPPP_FILTER.
Result is shown for kernelversion 6.9.9
Filtering for synchronous PPP
configname: CONFIG_IPPP_FILTER
Linux Kernel Configuration
└─>Device Drivers
└─>ISDN support
└─>Old ISDN4Linux (deprecated)
└─>Filtering for synchronous PPP
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
Say Y here if you want to be able to filter the packets passing over
IPPP interfaces. This allows you to control which packets count as
activity (i.e. which packets will reset the idle timer or bring up
a demand-dialled link) and which packets are to be dropped entirely.
You need to say Y here if you wish to use the pass-filter and
active-filter options to ipppd.
IPPP interfaces. This allows you to control which packets count as
activity (i.e. which packets will reset the idle timer or bring up
a demand-dialled link) and which packets are to be dropped entirely.
You need to say Y here if you wish to use the pass-filter and
active-filter options to ipppd.