On Fri, May 30, 2003 at 11:43:32AM -0600, Scott Mecham wrote: > Need help with subnetting. > > My company owns a half of a class C license of ip's. For example I'll > call the network 10.5.73.0/24. But we are only allocated the upper > portion of the class C ip range (10.5.73.128-10.5.73.255). > > How do I mask these out to my router and then to my firewall? How do I > mask out only the upper part of the ip range? > > I've tried 10.5.73.128/25 or 255.255.255.128. But it does not work properly. > > We have a T1 internet line. Then a Router. Then a firewall wich provides > NAT. Then our LAN (192.168.0.0/24).
10.5.73.128/25 is the correct notation for ipf rules. Do you get an error when you use that? If so, what is the error? -c
