Backup up SQL Server on member server protected by firewall

Hi

I have a network with an SBS 2011 Standard server running backup exec 2012 SBE.

I also have a member server running server 2008 and sql server.

I have bought the agent to be able to backup the sql server.

The Sql server is protected internally by a hardware firewall and i need to know what ports to forward to allow backup exec to install and backup the server.

thanks

Tim