Problem with the connection to the WebUI of a UPS5000A 120kVA .
The ping is working but when try to connect to it via a browser ( IE, Chrome, FireFox), it shows that the connection is not successful, ( some kind of response from the UPS comes with an error, because otherwise it would have written that the page is not found).
1. Check the IE settings:
1.1 . Open the browser (Internet Explorer 8 as an example) and choose Tools > Internet Options.
1.2 On the Advanced tab page, ensure that Use TLS 1.0, and Use TLS 1.1 are selected and click OK, as shown in Figure below.
-In monitoring and power versions earlier than V100R002C01SPC007, the software package version uses default Internet Explorer settings. In this case, ensure that Use SSL 3.0 and Use TLS 1.0 are selected.
-In monitoring and power version V100R002C01SPC007 or later, the software package version also requires the selection of Use TLS 1.1 in addition to the default Internet Explorer settings. In this case, ensure that Use TLS 1.0 and Use TLS 1.1 are selected.
1.3 Settings in the Internet Options dialog box
1.3. Enter https://UPS IP address in the address box of Internet Explorer.
1.4. On the login page, select a display language, enter a user name and password, and click Login (as below). The UPS supports Internet Explorer 6, Internet Explorer 8, and Firefox 31.0.
Customer’s Answer: The IE browser setting are done accordingly, but still cannot access the WEbUI of UPS5000A
2. Confirm the browser types and versions; and check the IP
Customer’s Answer: Internet Explorer 8. (on which were done the IE settings send)
3. Check the UPS5000A firmware version (on the About screen of the UPS)
The version later than V100R002C01SPC007 and due to this, there were selected Use TLS 1.0 and Use TLS 1.1.
4. What is the IP number and setting?
He has done a Port scanning :
There is only port 22 open. Ports 443 , 80, 8080 are not open. Customer confirmed that he can connect using port 22 .
The UPS5000A was connected to a switch.
Following the port scanning, customer could only login on 22 , which was open. This means he could login on SSH (Port 22 is SSH)
Port 80 is used for (http:// ) access, it’s OK to be closed.
The solution was to enable port range forwarding 443 from the Switch settings . Because the 443 is the web secure port (https://), and the Web UI of the UPS can only be access with https://UPS IP address.