On Thu, 2010-02-04 at 09:19 -0500, Ross Walker wrote:
On Feb 3, 2010, at 9:36 PM, David McGuffey davidmcguffey@verizon.net wrote:
I'm trying to reduce the attack surface to a home machine that is always on and connected to the Internet. It is running CentOS 5.4, with tight iptables rules and sits behind a Verizon FiOS firewall/switch also configured with tight rules.
I was wondering how to best block all network access to it when I log off...then unblock it when I log on. Changing iptables requires root access...as does running ifdown and ifup scripts.
I could change the permissions on ifdown and ifup and run them from the login/logout scripts, but I'd prefer not to do that.
Any tips?
Set iptables to block all inbound traffic unless initiated from your workstation.
It's the most secure, all the time.
-Ross
It is already set up that way...but I was thinking about taking the interface down if no one is logged into the console (this is a workstation used as a home computer and not supporting any network servers).
I was thinking of a cron job that would run 'who' and if there were no active logins, run 'ifdown eth0'
DaveM