Astaro does support DSL indeed, but out of the box, it only supports permanent IP addressing. If your DSL provider uses DHCP or PPPoE to give you an IP-address, you will need to modify the ASL 2.0 a bit. I haven't done it, but it may or may not work for you.
For DHCP support, use this package: DHCP for ASL For PPPoE support, try this
If you need help with any of the above, go to the Beta hackers forum.