IPTables and FORWARD chain
I'm reading about IPTables and its tables and chains, but I have some problems understanding how a forward works.
I wrote some conclusions of what I understood so far:
1. every incoming DNATed packet goes necessarily to FORWARD
2. every outgoing SNATed packet not necessarily comes from FORWARD
3. every forwarded packet was DNATed at PREROUTING and SNATed at POSTROUTING
I hope you can help me to confirm that I'm in the right way.
Kind regards and thanks for advance.