The display filter syntax to filter out addresses between 192.168.1.1 – 192.168.1.255 would be ip.addr=192.168.1.0/24 and if you are comfortable with IP subnetting, you can alter the /24 to change the range. To do so go to menu 'View > Name Resolution' And enable necessary options 'Resolve Addresses' (or just enable all. To make host name filter work enable DNS resolution in settings. However, if the addresses are contiguous or in the same subnet, you might be able to get away with a subnet filter. The problem might be that Wireshark does not resolve IP addresses to host names and presence of host name filter does not enable this resolution automatically. One time-consuming approach would be to literally type out all the addresses you want to filter on. Display filters can be specified in the 'Apply a display filter' box at the top of the main window, below the toolbar. In this video, I respond to a question from one of my readers who wanted to create a display filter for many IP addresses. Capture filters can be specified in the 'Enter a capture filter' box underneath 'Capture' on the Wireshark main screen and in the 'Capture filter for selected interfaces' box in the 'Input' tab of the 'Capture Options' dialog. In either case, you will need to use a display filter to narrow the traffic down. Even when you have a capture filter, it may be too generic. You may not know what to focus on when you capture packets, resulting in no capture filter. A display filter is configured after you have captured your packets. A capture filter is configured prior to starting your capture and affects what packets are captured. Note that in Wireshark, display and capture filter syntax are completely different.
In this video, I review the two most common filters in Wireshark. One of the keys to being an effective network troubleshooter when using a protocol analyzer is the ability to see patterns, which is where filters come into play.
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