[SATLUG] Netmask /32 - is it usable?

Don Wright satlug at sbcglobal.net
Sat Jun 2 12:30:58 CDT 2012


Bruce Dubbs wrote:

>It could be useful in a routing table:
>
>Destination  Gateway      Genmask         Flags Metric Ref    Use Iface
>1.2.3.4      0.0.0.0      255.255.255.255 U     0      0        0 eth1
>192.168.0.0  0.0.0.0      255.255.255.0   U     0      0        0 eth0
>0.0.0.0      192.168.0.1  0.0.0.0         UG    0      0        0 eth0
>
>The destination could do the same in reverse, so the conversation would 
>only be between those two systems.
>
>   -- Bruce


So eth1 could be set up as 4.3.2.1/32 and the routing would allow specific
connections, much as firewall rules may start with deny all and add specific
connections to allow.

The original query was about assigning the /32 by DHCP - which may support
static routes along with a blizzard of other interesting options not provided by
the usual consumer NAT box. Looks like some good RFC reading ahead.  --Don

-- 
Migraine: All the fun of a hangover without the bother of 
getting drunk.


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