To save you the hassle, you can set this by first clicking the Capture Options button (highlighted in red below) on the toolbar (alternatively you can use Ctrl+K): If you’re using Wireshark version 2, this has changed and is – in my experience – difficult to find. Now you can start your capture in the usual way. In the above you can see that whilst the packet is sliced at 64 bytes (see bytes values at the bottom), Wireshark still correctly displays the packet as an SSL packet and does not complain about CRC and/or length errors.ĭouble click on the interface (highlighted in the above in red for my example) which shows the “Edit Interface Settings” like so:Īgain, highlighted in red you can see the setting “Limit each packet to” which I have, for this example, set to 64 bytes. What’s good about this feature is that Wireshark displays the packets with the assumption that they are already sliced, so for example you can see that the below frame packet is 1067 bytes in length (the IP packet is 1053 bytes), however as Wireshark has a snaplen setting set to 64 bytes, only 64 bytes are recorded: This is Wireshark terminology for slicing, so it allows you to display only the first “x” number byes in packets. There is a little known setting within Wireshark where you can use the “snaplen” feature to limit the size of packets. Header Checksum) is now incorrect because you have effectively sliced the payload (or more) off. This is because (for example) the checksum for the IP Layer (a.k.a. As such protocol analysers will – as designed – show that the packet is corrupted in some way. The trouble with sliced packets – this is a general statement – is that whilst the packet is sliced it does not include any data within packet/frame to indicate that slicing has occurred.
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