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34972a Remote control Using a Cellular Router and Dynamic DNS

Question asked by alan123 on Aug 17, 2015
I am using a 34972A data logger and I'm trying to establish remote connection between laptop and dtata logger over the Internet via, dynamic DNS service.
In order to do that I have connected the 3G HSPA USB adapter (Tp-Link MA260)  to the portable 3G/4G Wireless N Router (Tp-Link TL-MR3020) which i then connected to the LAN interface on 34972A.  
I have set the port forwarding to the 5025 port for accessing the 34972A over its IP address, assigned from router.
When I'm connected to router network, I have no problems accessing  the 34972A web interface through browser, but when I try to access it from another network via port forwarding (ddns) the ERROR sign is displayed on the front panel of the 34972A. (Just for information, the router is remotely accessible via ddns service).
Do you have any suggestions how should I approach this problem? I cannot find the proper answer on the support forums.
Thank you and best regards,

Edited by: Alan123 on Sep 3, 2015 4:37 AM