IPv4-Embedded IPv6 address bit 64 to 71 must be zero: Label: 4.0. 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. Display Filter Reference: Internet Protocol Version 6. However, if the addresses are contiguous or in the same subnet, you might be able to get away with a subnet filter. One time-consuming approach would be to literally type out all the addresses you want to filter on. To capture packets where either the source or destination MAC address starts with 00:0C:22: In the capture filter. But if you know where in the MAC address field those three bytes will be, you can use a byte-offset capture filter. In this video, I respond to a question from one of my readers who wanted to create a display filter for many IP addresses. You probably cant create a capture filter for MAC addresses containing 00:0C:22 anywhere in the MAC address fields. In either case, you will need to use a display filter to narrow the traffic down. To see all packets that contain a Token-. ip.addr 1.2.3.4 or ip.addr myhost filters any packets to or from the ip address or host name ip.addr 1.2.3.0/24 filters any packets in the 1.2.3.4.0 class c subnet. Even when you have a capture filter, it may be too generic. If you want to see all packets which contain the IP protocol, the filter would be ip (without the quotation marks). 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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