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. But in fact filter 2 will give me all udp traffic, regardless of port. Filter 2: (udp.port > 48776) and (udp.port < 48778) In my point of view, these two filters should give be same results. However, if the addresses are contiguous or in the same subnet, you might be able to get away with a subnet filter. I am trying to filter the traffic by udp port and find out that range filter is not working. One time-consuming approach would be to literally type out all the addresses you want to filter on. The port can be a number or a name used in /etc/services (see. In this video, I respond to a question from one of my readers who wanted to create a display filter for many IP addresses. True if the packet is ip/tcp, ip/udp, ip6/tcp or ip6/udp and has a destination port value of port. 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. Capture several seconds of packets, then click the red square in the toolbar to. A display filter is configured after you have captured your packets. After double-clicking on the interface name, Wireshark will begin capturing. 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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