Hi,

I have been trying to figure out how the -i switch works.

Say, I use -i 192.168.0.0 will pp only accept connections from a machine with  ip address 192.168.0.0 or any machine with ip address greater than 192.168.0.0 or anything else?

Thanks

This is an basic networking question.  The interface -i x.x.x.x is the socket listening interface on the server your ppserver.py script is running on; -i is not a netmask.  (Based on your question it actually seems that you are confusing the -i option with the -b option.)  0.0.0.0 means listen on all interfaces (both 127.0.0.1 and xxx.xxx.xxx.xxx where the xxx address is the address of that hostname on the local network). 

In other words, changing the listening interface to 192.168.0.0 will not increase the range of interfaces your ppserver.py is listening on.  I would expect that your ppserver.py script would become unreachable because that server has no interface defined for 192.168.0.0, but I could be wrong depending on your operating system.

There are generally only two cases where you would use the -i option:

• you want your ppserver.py to respond only to remote clients (-i your.host.ip.address)
• you want your ppserver.py to respond only to local clients (-i 127.0.0.1)