2
votes
2answers
128 views

List firewalls on the local machine

In Windows besides the Windows firewall a user could have installed a firewall program, or there is another service listening to that port. In Ubuntu how can I see what blocks/filters open ports? ...
1
vote
1answer
233 views

How can I give a user permission to open low port numbers?

If I'm root, how can I give a user permission to open low port numbers ? Or how can I take away the right to open high port numbers from a user ? Cheers !