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Software Development > C# > Given a subnet mask, how to verify if an IP falls in that subnet.
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Apr 8th, 2009
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Given a subnet mask, how to verify if an IP falls in that subnet.

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Hi, I have a scenario wherein I need to give access of a system to the hosts of a subnet. For that I need to verify if the incoming request is from the IP which falls within the subnet. Is there some way to do that automatically using c# functionality.
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beckman16 is offline Offline
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Apr 8th, 2009
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Re: Given a subnet mask, how to verify if an IP falls in that subnet.

subnet info is not embedded to ip address, it is not in that context.
subnet mask can be anything for a given ip address. subnet masks are used to group ip addresses. what you can know about ip address could only be its type like a,b or c.
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serkan sendur is offline Offline
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Re: Given a subnet mask, how to verify if an IP falls in that subnet.

It is like with given subnet 255.255.255.224, its not possible to have a host with IP 192.168.10.32.
Last edited by beckman16; Apr 8th, 2009 at 4:15 pm.
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Apr 9th, 2009
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Re: Given a subnet mask, how to verify if an IP falls in that subnet.

Check this cool bit of code out:

http://blogs.msdn.com/knom/archive/2...-networks.aspx

This guy has a pretty slick solution!
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