Hot answers tagged iptables
iptables does not effect data sent over the serial port (unless you're running PPP or similar over the port, of course). But that command you gave is pretty broad, for example, you dropped packets that are entirely internal to the machine (go over lo). Depending on how your serial port is set up, maybe that was required. Dropping traffic over lo tends to ...
Without the NEW rules nothing is laced into the db and thus ESTABLISHED,RELATED will never match anything. This is false. There are five userland states (there are more in kernel space), and while an ESTABLISHED or RELATED connection does logically need to begin with a NEW packet, you do not need any explicit NEW rule to produce such a connection (you ...
To check which programs is listening on a port. The command netstat has options to show listened ports and programs/pids, I usually disable DNS look up as well. netstat -nlp or just tcp ports netstat -nltp man netstat for further reading and all options.
I also have an openwrt router configured to forward anything going to port 80 to port 3128 and then SNATting it to include the router's ip fro every client request. The thing is that everything was working with the default config ( transparent only added) with the 3.2 version but the 3.3.8 version is not happy. If I switch it to transparent and use the ...
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