Security with shoutcast stream!

[veldh205]

I think there could be an secrurity problem if you are streaming with Shoutcast. I have an Alcatel Speedtouch 570 router with firewall but the port in use by Shoutcast is routed by the NAT. (that means that traffic will be permited) It's verry important to use a second firewall instead that no other access will be posible. But my question/problem is that i want to be sure that people cannot use this port (8000 / 8001) for other purpose than only to listen with Shoutcast. I have been hacked entirely this week. One of my former webmasters have the details of wich IP-adres and port i use for Shoutcast and problay break in to hack my entire Windows XP system. I'm pretty sure that all other ports are secured by the Alcatel router. I has to explain that at this time i had to close the software firewall due administrating reasons from remote (windows remote desktop) Down below i will give you some spes about my configuration. Maby my system can be secured even more?!

Windows XP Pro (Integrated firewall switched off)
Alcatel Speedtouch 570 with NAT

NAT configuration:

Shoutcast NAT: XX.XX.XX.XX:8000
Shoutcast NAT: XX.XX.XX.XX:8001
Remote Desktop Windows NAT: XX.XX.XX.XX:???? (don't know portnumber now...)

That are the only ports who are reachable from outside.

Further the Tiny Personal Firewall (latest version) and Mcafee Anti Virus (updated)

I use DHCP on my Router and my networkcard as well.

Is this secure enough or is it posible that i will lose my system again by an hacker?

What can i do more about it?

Do anybody have experience with this?