DataDomain OpenStorage ports
The following ports must be open to use a DataDomain OST storage server.
The TCP ports for 2049 (nfs), 111 (portmapper), and 2052 (mountd) must be open from the media server to the target storage server.
The UDP port 111 (portmapper) must be open from the media server to the target storage server.
The TCP port 2051 (replication) must also be open from the media server to the storage server for optimized duplication.