While assisting a client troubleshooting some issues with their APC Smart-UPS 3000 RM I was unable to login to the web interface to grab information from the logs. When attempting to login via the web interface I received a message stating that someone else is currently logged in as shown in the below example image.
APC UPS Web Interface Stating Someone Is Logged In:
After asking around it was determined that nobody else was logged in or had been logged in for quite some time. Resolving this issue is easy though I wanted to point it out because you may not think to do this to resolve the issue logging into the web interface. So to resolve all you need to do is telnet into the device and logoff properly by typing the “4” button. Once you have done this you should be able to login via the web interface of the APC Smart-UPS 3000 RM without issue.
**UPDATE** Thanks to mike in the comments below for offering a second method to accomplish the same task. Add /logout.htm to the end of the URL and that should also accomplish the same goal of logging out the user. Thanks mike!