![]() In the example below we tried to filter the results for http protocol using this filter: http 6. ![]() Just write the name of that protocol in the filter tab and hit enter. The "Filter Expression" dialog box can help you build display filters. Its very easy to apply filter for a particular protocol. 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. HTTP GET: After TCP 3-way handshake SYN, SYN+ACK and ACK packets is done HTTP GET request is sent to the server and here are the important fields in the packet. 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 A comprehensive reference of filter fields can be found within Wireshark and in the display filter reference at FILTER SYNTAX Check whether a field or protocol exists The simplest filter allows you to check for the existence of a protocol or field.
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