wireshark capture filter host and protocol

If you have promiscuous mode enabled-it’s enabled by default-you’ll also see all the other packets on the network instead of only packets addressed to your network adapter. Wireshark captures each packet sent to or from your system. You can configure advanced features by clicking Capture > Options, but this isn’t necessary for now.Īs soon as you click the interface’s name, you’ll see the packets start to appear in real time. For example, if you want to capture traffic on your wireless network, click your wireless interface. Capturing PacketsĪfter downloading and installing Wireshark, you can launch it and double-click the name of a network interface under Capture to start capturing packets on that interface. Don’t use this tool at work unless you have permission.

The 'Filter Expression' dialog box can help you build display filters.Just a quick warning: Many organizations don’t allow Wireshark and similar tools on their networks. For display filters, try the display filters page on the Wireshark wiki.

For example, to capture only packets sent to port 80, use: dst tcp port 80Ĭouple that with an http display filter, or use: tcp.dstport = 80 & httpįor more on capture filters, read ' Filtering while capturing' from the Wireshark user guide, the capture filters page on the Wireshark wiki, or pcap-filter (7) man page. If you want to measure the number of connections rather than the amount of data, you can limit the capture or display filters to one side of the communication. Note that a filter of http is not equivalent to the other two, which will include handshake and termination packets. Ping packets should use an ICMP type of 8 (echo) or 0 (echo reply), so you could use a capture filter of: icmpĪnd a display filter of: icmp.type = 8 || icmp.type = 0įor HTTP, you can use a capture filter of: tcp port 80

Wireshark capture filter host and protocol