Re: IP_FORWARDING

[Icarus Sparry <I . Sparry @ midge . bath . ac . uk>]

By default, a Sun with only a single interface will not forward an IP
packet.

/sys/netinet/in_proto.c has suitable comments to explain what the
variable ip_forwarding means. Essentially it will only forward
packets if the value is >0, and it will be 0 is there is only
one interface.

options IPFORWARDING=-1

in the configuration file (in /sys/`uname -m`/conf) will ensure that it
will never forward a packet, even if you add another interface.

Icarus