Cannot access packages after new install.

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Install RC 1.2.3 on a box.  I  have internet access on a workstation behind the LAN side of the PFSense box and can ping and trace via DNS but the PFSense box will not load packages.  Said to check DNS , gateway etc but that is all correct otherwise I would not be able to access the Internet.  network setup is as follows:

Internet (10/10 TWC Fiber) - TWC Cisco Router / Gateway - DMZ Switch - PFSENSE WAN port / IP - Dlink DMZ Switch - Linksys WRT54G Router/Wireless - laptop using wireless.

Any ideas??