October 17th, 2005, 08:34 AM
Making a Firewall
I want to make a firewall. Firstly, is a firewall solely for stopping people from connecting to your ports or does it do other stuff as well? Secondly, how do you close access to your ports? I tend to work in java and I have a limited experience of sockets and networking.
Cereal: Eaten at all times of the day.
October 17th, 2005, 08:40 AM
As far as 'making' a software level filtering firewall goes, try seeing how others work as well. You might want to look into iptables (*nix) and it's switches.
You might want to ellaborate a little bit on this statement as well...
Secondly, how do you close access to your ports?
Stand-Alone Machine ?
I'd love to help you with that question, but different firewalls work differently, and of course there are different types. Hardware firewalls and Software based.
Firstly, is a firewall solely for stopping people from connecting to your ports or does it do other stuff as well?
In the link below is a small *Hardware And Software* debate..
PM me if you need any other help..
"Serenity is not the absence of conflict, but the ability to cope with it."
October 17th, 2005, 09:13 AM
They do stop people connecting to open ports, they also stop programs accessing the internet/network, log attempts from inbound packets to enter through a port, allow configuration to allow selected data types through specific ports. Some also hide open ports to fool some lower end port scanners.
October 17th, 2005, 09:23 AM
Check out SourceForge for some existing sources for Firewalls. And be prepared to learn a lot about sockets and networking.