This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Virginia, A downstream LDM will first try to connect to the upstream LDM using port 388 on the upstream host. If that fails, then the downstream LDM will try to connect to the portmapper on the upstream host. The portmapper uses port 111. If you network staff isn't seeing an attempt on port 388, then something's blocking the attempt. > Hi Steve > Yes I am told we allow 388 > But our Network staff says they are seeing traffic on 111 at the FW not 388 Regards, Steve Emmerson Ticket Details =================== Ticket ID: LIF-500875 Department: Support LDM Priority: Normal Status: Closed