Capture Filter with Wildcard in IP Address

Question

I am trying to customize Wireshark capture such that is captures all IP addresses (both source and destination) with the IP address format xxx.xxx.xxx.100.

I used the following Capture Filter

ip matches /.*/.*/.*/.100

but the text box remains red'

These are not IP addresses in a particular range, just the fourth octet is 100

Answer 1

Your regex is a little off, as you need to use a backslash to escape the periods. Try this:

ip.host matches "\.100$"

That should match .100 at the end of the string.

Source: http://ask.wireshark.org/questions/22230/filter-for-partial-ip-address

Edit: Try using the Display Filter (Analyze->Display Filters..), not the Capture Filter