Accordingly this advice from 'traffic_shaping.htm':

Normally, packet marking occurs in the PREROUTING chain before any address 
rewriting takes place. This makes it impossible to mark inbound packets 
based on their destination address when SNAT or Masquerading are being 
used. You can cause packet marking to occur in the FORWARD chain by using 
the MARK_IN_FORWARD_CHAIN option in shorewall.conf.

    i MUST use 'MARK_IN_FORWARD_CHAIN=Yes' or ':F' suffix in a lot of 
rules
in 'tcrules' if i use NAT/SNAT (configured in 'masq' file) and want to use
internal (private) IP-addresses (or networks) in 'tcrules'.
    Do i correct understand?

    Alex

         






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