How to search for data from specific subnets, using Reporter 9.X.
You can customize any report by adding a filter to it. One of those filters can can be to filter on data from a specific subnet, using the the "Matches mask" option:
Steps to use this feature:
NOTE: Any other filtering criteria can be added to this report. For example, you may wish to add in a specific username here, such as User -> Is -> <username>, or if you want it to be ANY authenticated user, select the negate filter of User -> Is Not -> -EMPTY-.
Detailed discussion of how CIDR notation works:
With this feature, Reporter allows for the user of CIDR notation. So, instead of a wildcard such as 10.12.13.*, we now use a this format - 10.12.13.0/24 - to search for the same thing. To search for all numbers in the subnet of 10 we'd use 10.0.0.0/8
This filter allows you to use C.I.D.R notation to filter for IP addresses in Reporter. C.I.D.R notation stands for Classless, InterDomain Routing. Standard IP addresses ( version 4) today contain four base ten numbers separated by a dot ( .). For example 10.1.2.3. In previous versions of Reporter, to search for a IP address in the database you could only use a wild card search that was limited by the base ten numbering system, such as 10.1.2.*. This would give you all the IP addresses that start with 10.1.2. and simplistically speaking all the hosts that reside in the network number 10.1.2. X
However, in todays routing infrastructure, network numbering rarely, if at all, contains itself to the "dot" boundary in the IP address. The network number is almost always a number the crosses over this boundary and takes up part of the next number after the dot. Computers to not "THINK" in terms of the numbers we see in the IP address, they think in terms of a binary number. So while we see 22.214.171.124. the computer sees 00000001.00000010.00000011.00000100. Using a binary number to mask out the network number can, as you can see, cross very over into our human "dots'.. Each number we see in the IP address is 8 binary digits. Today, with the use of CIDR notation, we can cross over this boundary by counting the number of binary digits from left to right to be our network mask. In other words, a CIDR number of 12 would cross over the first number and be 4 binary digits into the second number., but a number of 24 would mask the entire first three numbers we see in the IP address.
For more information on C.I.D.R see:
Note1: You can also use "Does not Match Mask" for addresses you want to exlude from your results.
Note2: See your network administrator for what masks he/she may be using in their network.
Some very early versions of Reporter, version 9.1.x, did not include this feature. Any customer who does not see this filtering option, needs to upgrade to the latest version.
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