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How to make two subnets communicate with each other on Windows Server

Posted on 2010-09-22
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Last Modified: 2012-05-10
Here is my situation:
I have a client using 192.168.1.0/24 for their main network.  They are starting to use up their available IP addresses.  Their windows server is handling dhcp/dns/vpn.  I have routing and remote access installed and functioning, but what I want is to have routing and remote accessing to issue its own range of IP addresses on 192.168.2.1, so that all users who connect in on VPN will get a 19.168.2.1 address, thus leaving the 192.168.1.1 addresses alone.  Is there a way to make those two subnets communicate so that 192.168.2.1 vpn users can connect to 192.168.1.1 devices on the network?
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Question by:AremP
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6 Comments
 
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Expert Comment

by:x3man
ID: 33734812
No you can't. What you can do is exclude a range of addresses in the 192.168.2.0 scope from DHCP and specify that the RRAS server uses those.
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Expert Comment

by:x3man
ID: 33734882
Actually this might be what you are looking for: http://technet.microsoft.com/en-gb/library/bb878091.aspx
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Expert Comment

by:x3man
ID: 33734964
Sorry first comment should have read "What you can do is exclude a range of addresses in the 192.168.1.0 scope from DHCP and specify that the RRAS server uses those". NOT the 192.168.2.0 scope. This would at least prevent those addresses from being leased by DHCP.
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Author Comment

by:AremP
ID: 33734979
I don't have any extra addresses to exclude in the 192.168.1.1 subnet.  I need to create a separate DHCP server on the 192.168.2.1 subnet that VPN users will get but still be able to communicate with devices on the 192.168.1.1 subnet.
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Expert Comment

by:x3man
ID: 33735134
You could use an "Off Subnet" Address Pool as mentioned in the article above. However this will also require some router configuration in order to allow the different subnets to communicate.
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x3man earned 500 total points
ID: 33735213
Additional configuration info for off subnet addresses here: http://technet.microsoft.com/en-us/library/ff687790%28WS.10%29.aspx
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