I am trying to do a tcpdump on a Sophos XG firewall and filter the output. I know it is possible and I have done it before, but for the life of me I can't remember how.
I have looked at the resource HERE which outlines basic tcpdump functions.
What I want to do is something like: tcpdump 'src host 192.168.1.1' | grep xyz
However, grep and | are not recognized - Again I know it is possible because I have done it, I just can't seem to remember how.
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