Open a TCP port in Ubuntu's ufw firewall
Answer:
To open a TCP port, e.g. 8080 in the Ubuntu's UFW firewall (Uncomplicated firewall)
# sudo ufw allow 8080/tcp
# sudo ufw reload
How to generate random password?
Answer:
Install the "makepasswd" package, for example, in Ubuntu, type
sudo apt-get install makepasswd
Then execute command
# makepasswd
ShdDHNt7z
Or you can use another tool called pwgen
sudo apt-get install pwgen
and execute
# pwgen 8 10
It will generate 10 passwords with length equal to 8
How do I set up a firewall under Linux?
Answer:
In Linux, IPTables is the default firewall for kernels 2.4 and above.
IPTables is quite a complicated software which cannot be explained in just a few words, please refer to a more comprehensive howto:
Dec 252009
How do I use GPG?
Answer:
The following tutorial are recommended to learn more about GPG:
The GNU Privacy Guard HandBook: http://www.gnupg.org/gph/en/manual.html
Dec 252009
What is security?
Answer:
Security, in a nutshell, is ensuring the Confidentiality, Integrity, and Availability of your systems and network.
