[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[LDM #YYO-509858]: LDM Using Random Ports

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.

  • Subject: [LDM #YYO-509858]: LDM Using Random Ports
  • Date: Thu, 20 Feb 2020 11:38:36 -0700
Tom,

> I have been using LDM for many year very successfully.

Glad to hear it.

> I am trying to establish a new LDM connection outside of our firewall.  The 
> firewall has been configured to allow send and receive from port 388 (at 
> least that is what I am told as I have no control over that).

Sounds familiar. :-)

> The connection fails and I have been shown in a router log the following type 
> of messages which indicate that LDM is not using the standard port 388.  
> Nowhere that I know of am I telling it to use a different port.  Have you 
> seen this before?  Do you know what would cause this?  Or maybe this is 
> normal?
> 
> tcp session: initiator (155.78.63.227:44638) -- responder (198.206.45.200:388)
> tcp session: initiator (155.78.63.227:51868) -- responder (198.206.45.200:388)
> tcp session: initiator (155.78.63.227:46959) -- responder (198.206.45.200:388)

What's the direction of the initial contact? Are you creating a downstream LDM 
(as a result of a REQUEST entry in the LDM configuration-file) that's trying to 
connect to an upstream LDM that's outside your firewall or is it the reverse?

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: YYO-509858
Department: Support LDM
Priority: Normal
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.