[ILUG] Enabling server to access single IP address out of netmask range
cormac_hogan at hotmail.com
Thu Jun 8 14:28:23 IST 2000
Date: Thu, 08 Jun 2000 06:27:49 PDT
Content-Type: text/plain; format=flowed
With a netmask of 255.255.255.0, I believe that the only hosts which this
oracle server (192.168.200.1) can reach are from 192.168.200.1 -
192.168.200.254. Therefore I'm confused as to how it can even reach the
router 192.168.1.1 as it will think that this is a different class C network
If the netmask was 255.255.0.0, then it wouldn't be a problem as the router
and host would be on the same class B network.
Alternatively, if you want this host to reach the 192.168.205 network, you
would need to set the netmask to 255.255.250.0. This will allow the oracle
server (192.168.200.1) to reach hosts in the address range 192.168.200.1 -
192.168.205.254, i.e. your print server & associated routers.
If you now want wish to narrow this down further and only access a certain
range of hosts, this gets more tricky. Because of the way the netmask is
organised, if you wish to allow access to hosts from xx.xx.xx.60 to
xx.xx.xx.70, you will need to set the msbit of the lsbyte of the subnet
mask, i.e. 255.255.250.128. This will mask all hosts except hosts from
xx.xx.xx.1 - xx.xx.xx.126. However, this screws you since your print server
& router are .240 & .254 repectively. To allow routing to these hosts, you
can only set the subnet mask to 192.168.205.255, allowing access from the
So I don't think you can achieve what you want.
Hope this helps anyway.
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