MBPro - IP Address not found at Login

[Mattk]

Any clues on the following?

A very stable MBPro setup for over 2 years suddenly "Not found on network" to login yet the box is running, the sensor data is all good as the unit is uploading to the outside world but from behind a corporate network. Accessing the data folders is all good, export files are all good, valid and up to date which sits under the same IP used to login.

Now this system does use a Proxy Server/URL and allocated static IP address (as such) linked to the MAC address.

Knowing if there has been Proxy or firewall changes is generally difficult but what why would the login page be not found considering the operation status?

[admin]

When you do a remote login this might now be blocked by the corporate firewall. just guessing... Operation of Meteobridge will be untroubled, but access from external is blocked.

[Mattk]

Remote access via the MB remote login is well and truly locked down due to firewall restrictions.

I am accessing the actual network directly via Citrix login which behaves the same as local desktop PC directly on the network which also is failing login. I think somebody has changed something with the network somehow but trying to find out what has not had any answers.