> - setting ip/tcp/udp/icmp TTL through ndd:
 >   Do we really want to change the default ttl for all
 >   ip/tcp/udp/icmp packets? Esp when there are  socket options
 >   like IP_TTL, IPV6_UNICAST_HOPS, IP_MULTICAST_TTL for this?
 >   (See also 5046705)
 > 
 >   We have ip_def_ttl, ip6_def_hops, tcp_ipv4_ttl,
 >   tcp_ipv6_hoplimit, icmp_ipv4_ttl, icmp_ipv6_hoplimit,
 >   udp_ipv4_ttl, udp_ipv6_hoplimit, ip_broadcast_ttl. 
 >   Aren't IP_TTL, IPV6_UNICAST_HOPS, IP_MULTICAST_TTL
 >   sufficient? 

There are a number of times I can recall where the field has used the TTL
ndd parameters to workaround broken applications.

-- 
meem

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