Tips on securing your Linux systems, see Episode 431
Hosted by Ken Fallon on 2009-10-14 is flagged as Explicit and is released under a CC-BY-NC-SA license.
Tags: security,netstat,hosts file,iptables,Firefox,noscript.
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WARNING: It's easy to lock yourself out of a system implementing these changes so make sure you have physical access to the console of the system you are securing.
To display all processes listening
Deny all connections to any port from any external IP address
netstat -anp | grep -i listen
sshd:192.168.1.54 # My other pc
IPTables Tutorial: http://iptables-tutorial.frozentux.net/
A good starting point to block all except ssh:
Disable root login via ssh: http://www.howtogeek.com/howto/linux/security-tip-disable-root-ssh-login-on-linux/
Setting up ssh keys and disabling password logins.
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