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network-programmingip-addresslighttpd

What's the idea behind a network address?

I want to block an entire ip range from my webserver but I'm not sure if it's possible with lighttpd. What exactly is the idea behind a network address for example 10.0.0.0/8 or 176.4.8.0/24? Especially the backslash and the number confuse me?

Solution

  • That is the netmask. (A binary mask that tells the router which part of the IP to use)

    /24 stands from 24 ones so 174.4.8.0/24

    10110000.00000010.00000100.00000000 Address 11111111.11111111.11111111.00000000 Netmask

    This is kind of a pain to get right but its not hard http://en.wikipedia.org/wiki/Subnetwork