Explanation of macro

[Jille Timmermans]

Leslie Jensen wrote:
> I'm setting up a pf firewall and came across this macro
>
> SYN_ONLY="S/FSRA"
This means it will only match packets which have only set the SYN flag 
of FIN, SYN, RST and ACK.
This is the case when starting a new (tcp) connection.

-- Jille
>
> Have tried to find out what it does but have not been successful.
>
> Will someone explain Please?
> Thanks
> /Leslie
>
>
>
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