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We are using Windows 2008 R2 as a netbackup 7.0.1 media server. The firewall on the netbackup server was causing the puredisk 6.6.1 export to fail. In addition to your ports we had to open additional ports that were being blocked. Test for yourself to see which ports actually need to be opened but here is the list of what worked for us:
From you pos: Port 80/443/10082/10087 and 10101
In addition we had to open the following TCP Ports inbound to the netbackup server (Windows 2008 R2)
We are going to try to figure out which of those actually need to be opened when we talk to symantec support.
The ports I mentioned were only designed for Puredisk behind a firewall. The ports you have specificied 1556/137XX etc are for Netbackup.
For Netbackup there is a good guide
Its for release 6.0 but the ports should be the same.
Netbackup 7.0 Security and Encryption Guide also mentions the ports.