One Ubuntu Desktop and 3 different users.
When
Bob logs in, I want to block access to:
www.thatParticularSite.com
ssh.thatParticularSite.com
ftp.thatParticularSite.com
When
Tom logs in, I want to block access to:
www.someSuchSite.com
mail.reallyThatSite.com
www.thatPlace.com
ftp.NoGo.com
When
Joe logs in, I want to block access to:
www.LotsOfNews.com
mail.notThere.com
Don't care about http, ftp, ssh, tcp, udp, ...
I need to block by domain.
Want to avoid installing additional software on the system.
Can I do this by editing some files?
Can I edit files in the user's home directory and then change the permission to read-only for the respective user?