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BPF syntax help

Question asked by Jeremy Kerwin on Jun 22, 2017
Latest reply on Jun 27, 2017 by Guy Bruneau

Hi All,

 

I have three separate communications between hosts that I want to be able to filter out from our packet decoder.

I cannot for the life of me figure out the correct BPF syntax to make that happen.

I end up usually filtering nothing, or everything.

 

I've trying to filter the following out.

---

anything on vlan300

192.168.30.12 > 10.21.32.90:902

172.14.9.9 > 192.168.30.20:10566

----

I dont want to filter out the whole host traffic, just the specific communication on a specific port (eg. backup traffic).

Does anyone have experience in writing BPF?

 

thanks.

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