des 2f3574b0d4 Add support for stealth forwarding (forwarding packets without touching
their ttl). This can be used - in combination with the proper ipfw
incantations - to make a firewall or router invisible to traceroute
and other exploration tools.

This behaviour is controlled by a sysctl variable (net.inet.ip.stealth)
and hidden behind a kernel option (IPSTEALTH).

Reviewed by:	eivind, bde
1999-02-22 18:19:57 +00:00
..
1999-02-20 22:16:13 +00:00