: Looking at the patch, the change seems deliberate. At the same time a
: lot of other sysctl's were removed.
: It would be interesting to hear why.
Because redhat included references to 2.0 to their distribution,
and their scripts just die if do not see any ip_forward.
>From the other hand 2.1 has still not very much of users, and they
are enough experienced (as rule) to figure out what is the problem.
2.2 will look better, if it will be compatible with 2.0 here.
So, ip_forward and ip_default_ttl are made compatible with
2.0 both in /proc/sys sense and in binary sysctl() level.
Another variables can be set with per-interface granularity now,
so that they are moved to /proc/sys/net/ipv4/conf/{all,default,device}/
directory. Also /proc/sys/net/ipv4/route/ directory is added
to control routing tables, and /proc/sys/net/ipv4/neigh/
to control arp tables.
Alexey Kuznetsov
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