I'm trying to wrap my head around socket programming and what the material I've been reading is telling me. Say I have a firewall which allows traffic with connection state: NEW on a certain port for a short window of time(through port knocking or some other means). I have a second rule which allows all traffic with connection state: ESTABLISHED,RELATED that doesn't decay. My goal is to have server + client scripts that establish a new connection during that window and keep the connection open until the client script ends. The questions: Does it matter which type of socket I use? My n00b brain reads the descriptions and examples on UDP sockets as saying that it does matter, but at the same time I know I've run a few Doom servers with the same firewall scenario and I'm pretty sure it was UDP. How does the firewall identify which data is "related or established" and how can I make sure that the scripts maintain that connection state?
on 2009-02-22 23:51