Open Ports Mandrake 10

[Nutter]

Okedoke, (yes another newbie question.) I have Mandrake 10, I just attempted to install urpmi using
http://easyurpmi.zarb.org/
My routers firewall I believe blocked the access. Simple question, what ports are required to be open for this and Mandrake update etc. Any suggestions regarding the porting for Linux would be great.

[JohnT]

The mirrors all appear to be "ftp" which is normally expected on port 21.