I tried exactly that and it did not filter. A capture filter for telnet that captures traffic to and from a particular hostĪnd presume that if I enter 'host 69.4.231.55' I should see packets only from that one host. Then I select the tool 'Restart the running live capture.' After that I do something like click a link in another tab (as I type this in.) There are all kinds of packets captured other than from the host specified.Įxample 4.1. Having done this a few times I scroll the window down and select 'aaa' That puts 'aaa' in the filter name and 'src host 69.4.231.55' in the Filter string: Then I click OK. From the menu bar between Go and Analyze I select Capture then menu item Capture Filters. I start WireShark then select the one interface and click start. If I provide my steps maybe you can identify my error. I am not sure I am reading you correctly. Re: 1.Are you starting from the 'Capture Options' window to set the Capture Filter ? Specifically: Do Capture ! Options then select the Capture Filters button. Port filter will make your analysis easy to show all packets to the selected port.I had the wrong phrase so I changed it to 'src host 69.4.231.55', clicked OK, and none of the packets were from that host. In case there is no fixed port then system uses registered or public ports.

Now we put “udp.dstport = 67 || udp.dstport = 68” as Wireshark filter and see only DHCP related packets.įor port filtering in Wireshark you should know the port number. When we run only UDP through Iperf we can see both source and destination ports are used from registered/public ports.ĥ. Now we put “tcp.port = 443” as Wireshark filter and see only HTTPS packets. For port filtering in Wireshark you should know the port number. Now we put “udp.port = 53” as Wireshark filter and see only packets where port is 53.ģ. Here 192.168.1.6 is trying to send DNS query. Enter udp in the Capture Filter bar and press Enter to start. It’s the one directly above your network list. Now we put “tcp.port = 80” as Wireshark filter and see only packets where port is 80.Ģ. Look for the Capture Filter bar on the welcome screen. Here 192.168.1.6 is trying to access web server where HTTP server is running. Ports 1024 to 49151 are Registered Ports.īefore we use filter in Wireshark we should know what port is used for which protocol.In this article we will try to understand some well know ports through Wireshark analysis. To know more about filter by IP in Wireshark, please follow below link: Port filtering is the way of filtering packets based on port number.

Wireshark capture filter port