Screen OS

last person joined: 8 months ago 

This is a legacy community with limited Juniper monitoring.

  • 1.  Using IP/Netmask to define an approved span of IP Addresses

    Posted 04-14-2009 06:00
    Within my firewall software, I can not set a specific span (##.##.##.2-30) instead I have to use IP/Netmask, so, if I am allowing an entire 1-255 group it is pretty easy...

    ##.##.122.0/24

    but, what do I put if I only want to allow 2-30 (I am hoping someone can save me the 'binary' math..)
    ##.##.122.0/?????

    Thanks..


  • 2.  RE: Using IP/Netmask to define an approved span of IP Addresses
    Best Answer

    Posted 04-14-2009 06:24

    /27 is the closest you can get (it includes the .1 address as well)

     

     

    http://www.wildpackets.com/support/downloads/free_utilities/ipsubnetcalc/overview

     



  • 3.  RE: Using IP/Netmask to define an approved span of IP Addresses

    Posted 04-14-2009 07:17
    ipcalc 192.168.1.2 - 192.168.1.30
    deaggregate 192.168.1.2 - 192.168.1.30
    192.168.1.2/31
    192.168.1.4/30
    192.168.1.8/29
    192.168.1.16/29
    192.168.1.24/30
    192.168.1.28/31
    192.168.1.30/32