(PM) subnet masks

Fred Martin (martin@mix-net.net)
Sun, 7 Jun 1998 22:29:56 -0400 (EDT)

Assume (for example) that my network IP addresses start at:

208.80.232.33

and my firewall's IP address is: 208.80.232.33
with hosts/servers following, starting at: 208.80.232.34

My subnet mask is: 255.255.255.224
or: 11111111.11111111.11111111.11100000

(less the broadcasts I have 32 usable IP addresses)

When writing a filter rule that is testing for an "internal" source address
and any "external" destination address, is this correct:

permit 208.80.232.0/27 0.0.0.0/0

Thanks in advance,
Fred
martin@mix-net.net

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