[LARTC] How to redirect datagrams

Linux Advanced Routing and Traffic Control

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Hi, I have a little problem...
 
I want to put on a firewall (I dont know firewalls, and I dont
know if what I want is possible under linux...)
 
I need that function:
-To filter a specific IP/Port
- Redirect the corresponding datagrams in a proxy
 
That is to say, I need to modify the
IP Dest in the header, and to recalculate the CRC...
 
is it possible?
 
thank's.

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