Hi Michael,

Le jeu. 7 juin 2018 à 23:32, Michael Lum <[email protected]> a
écrit :

> Hi,
>
> I've attached two captures with a single packet in each.
>
> They are both supposed to be syslog events injected into the capture with
> SLL (Linux cooked capture).
>
> On one everthing is decoded as expected in the other with the same first
> 16 octets it is detected as
> Ethernet II only.
>
> I cannot figure out why they are not both decoded as SLL/Linux cooked-mode
> captures.
>
> Any thoughts would be greatly appreciated.
>
> I'm running on Windows 7 using Wireshark 2.6.1.
> The capture was taken on a CentOs 7 box by a tool injecting the "fake"
> syslog message.
>

This comes from the encapsulation type stored in the pcap file: one is
using 25 (Linux coooked capture) while the other one is using 1 (ethernet).
So something is wrong with the tool used to capture the second pcap.
You can fix the file with the following command: editcap -T linux-sll
sll-not_detected.pcap sll-not_detected_fixed.pcap

>
Best regards,
Pascal.
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