with kernels that do not support it, will result in a plain DROP instead
of REJECT. Use with caution.
Kernels that do support it:
+ 2.4 - since 2.4.22-pre9
+ 2.6 - all
- There are some issues related to upgrading from 1.2.x to 1.3.x on a system
with dynamic ruleset changes during runtime. (Please see