4
votes
1answer
346 views

Could someone tell me whether my OS is communicating with the internet?

I edited iptables so that when the VPN service is disconnected, no program will access the internet. Well, I did an experiment. I disconnected the VPN service manually and immediately did a ping by ...
1
vote
1answer
401 views

Setup firewall: ask user to allow new incoming/outgoing traffic?

I'm using Ubuntu 12.10 and as I know there is already a firewall on any ubuntu system. It's ufw and because I like fancy gui stuff I can use gufw, that's very nice. Now I would like to configure this ...
1
vote
2answers
1k views

Firefox cannot find website servers, what is wrong?

Recently, I tried to access the internet using Firefox. I have a good wifi signal according to the toolbar at the top, but Firefox says "Firefox can't find the server atwww.example.com." I tried ...
1
vote
3answers
861 views

How to disable Internet connection for a single process?

I know the PID of a specific process and I want to disable the Internet access for this process and only for this process, so other process can access Internet. Is there any way to do it? I ...
-1
votes
1answer
850 views

Setting up port forwarding on my router to Ubuntu machine [closed]

I just loaded up a older computer of mine to run a server for a game I'm working on, (it's a template server) and I need to forward ports 3200 and 3201, so that it can be accessed both on my local ...
3
votes
1answer
1k views

How to prevent certain applications from accessing the internet?

I want to prevent certain applications from accessing the internet. When I was using windows XP I had an application (i think it was Zone alarm) which always notified me when an application tried to ...
-3
votes
4answers
6k views

What ports should I open for listen and/or transmit in my firewall to keep internet ok? [closed]

What are the minimum ports and services that should I allow/open for listen and/or transmit in my firewall (I am using Firestarter) to keep my internet running ok? Some talk about what services, ...
17
votes
2answers
7k views

How to block internet access for wine applications?

Is it possible to prevent specific wine applications or any wine application from accessing the internet? When using certain apps under Windows, they were trying to access the internet from time to ...