A new Ubuntu Security guide has been posted on the Ubuntu forums.
I am writing this guide as a concerned member of the Ubuntu Community. Security is a concern for us all and in welcoming new (and experienced) users to Ubuntu I would like to demystify the complexities of security that come with your new OS.
The guide covers many topics, from basics like passwords to advanced topics such as intrusion detection:
- Permissions and Encryption
- Root kits
- Intrusion detection
- Secure servers
- Hardened kernels
I found it especially interesting how the firewall in Ubuntu works. The included firewall, iptables, is turned off by default. This is because a Ubuntu install does not have a single program listening to any port, making a firewall unnecessary.