Here's a version of the chart contained in Chapter 9 of the Wireshark Network Analysis book: If the IP destination address field contains 24.4.7.217 the packet will be displayed as well. If the field doesn't contain 24.4.7.217 -yippie! The filter matches and will be displayed. This filter looks in IP source address field first. An IP header has two IP fields - the source IP address field and the destination IP address field. Here's the first issue with this type of filter. If you hover over the field a tooltip explains that the filter may not work as desired. First of all - let's talk about the problem with a filter beginning with ip.src !=.Īs you can see from the image above, Wireshark turned the display filter area yellow to indicate something is wrong.
![wireshark filter source ip wireshark filter source ip](https://unit42.paloaltonetworks.com/wp-content/uploads/2020/08/word-image-6.jpeg)
Sake Blok spent a bit more time explaining what was going on here.
![wireshark filter source ip wireshark filter source ip](http://2.bp.blogspot.com/-KQTy_Bf5D90/UcNJDU7CGtI/AAAAAAAAA_g/Ty_-43WVkWA/s1600/IP+based+filter+wireshark.jpg)
What's up?Īvoid the use of != when filtering OUT IP address traffic. ip.src != 192.168.1.119 & ip.dst != 192.168.1.119 To my surprise, it returns some results with the that IP, such as this one: 157 238.065591 192.168.1.1 192.168.1.119 ICMP Destination unreachable (Port unreachable) The destination on this result is clearly one the filter should have blocked. I want to see results where neither the destination, nor the source are the specified a ddress here is my filter.
![wireshark filter source ip wireshark filter source ip](https://linuxhint.com/wp-content/uploads/images/port/3.png)
#WIRESHARK FILTER SOURCE IP FREE#
Another interesting question was posed at this week - it brings up a topic that I cover in the Wireshark 201: Filtering course (check out the schedule to catch the next free seminar on this topic).