Routers, Firewalls & Security

Linux I am currently working full time as a Linux system administrator within the Australian private business community. The systems I work with are all high availability, high security, internet facing servers of different descriptions. I first started working in IT back in 2001, for an Australian payment gateway in the Operations department. Since then, I have held a number of jobs including Systems Support for one of Australians domain registrars (.au namespace). I am currently interested in small, quick fix job involving Linux. I am able to work some weekends, and would prefer 2-4 hour blocks of work at the maximum. Strong problem solving is my passion, and Linux is my tool of choice.