Someone is currently logged into the APC Management Web Server

If you get a page saying ‘Someone is currently logged into the APC Management Web Server. Please try again later.’ when trying to connect to a managed APC PDU via the web interface there are a couple of likely causes.APC login error

  1. Someone is connected via the serial port – this will always override any IP connection.
  2. The web interface is ‘stuck’.

If it’s number 1 then you’ll need to find the machine physically connected and disconnect the terminal session, but the fix for number 2 is quite simple.

Just telnet to the device, then log off. This will reset the APC Management Web Server and you’ll be able to log in.

Thanks to the APC forum for the hint.


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47 responses to “Someone is currently logged into the APC Management Web Server”

  1. Joe avatar
    Joe

    Excellent! Saved me, thanks for the tip!

  2. Jesper avatar
    Jesper

    Your Telnet-suggestion solved the problem for me – thanks a lot!

    I have found that the problem appears if you closed the previous browser-session without logging off, but I didn’t know how to solve it remotely until now.

  3. Rich Golding avatar
    Rich Golding

    Excellent – Logging on through telnet worked for me too. Thank you!

  4. Another Joe avatar

    just wanted to say thank you !
    google found your page when I searched for this text and it the telnet trick worked, thank you

    1. Piers avatar

      Great! Pleased to have helped a few people out with this one.

  5. Jon avatar
    Jon

    Excellent tip. Really helped me out!

  6. Paul avatar
    Paul

    Telnet work on 2 of 3 UPS unit’s the third refuses telnet connection. Any other suggestions?

    1. Piers avatar

      My only other suggestion would be to connect a console/serial cable to it and try to reset from there.

  7. Rizwan avatar

    Thank you for this tip about “Telnet” – it worked for me, the NMC warmstarted and then everything was back to normal again.
    Thanks.

    1. Piers Chipperfield avatar

      Hi Rizwan,

      Glad my post helped you.

      Piers.

  8. Alex Heer avatar

    Telnet worked – thanks!

  9. Christopp avatar
    Christopp

    Excellent! Googled the issue and found this site. Telnet worked for me as well. Thanks!

    1. Piers Chipperfield avatar

      Thanks for the feedback Chris, glad I could help!

  10. Fabien avatar
    Fabien

    Very clear and helpful ! That did the tricks, many thanks Piers for that 🙂 (I could have searched for entire hours lol)

    1. Piers Chipperfield avatar

      Glad I could help Fabien 🙂

  11. Steve Trudo avatar
    Steve Trudo

    Here is even a faster way, change the logon.htm to logout.htm:
    http:///logout.htm

    1. Piers Chipperfield avatar

      Good tip, thanks Steve.

    2. laapsaap avatar
      laapsaap

      logout.htm makes so much more sense. Telnet should always be disabled.

  12. Bob avatar
    Bob

    Neither method works for me. When I connect by Telnet, I get a apc> prompt, but anything I enter is just echoed and nothing happens. Using logout.htm brings up the same original error.

    1. Piers Chipperfield avatar

      Try connecting using Putty, otherwise you’ll probably need to reset the management card.

  13. Martin Pritchard avatar
    Martin Pritchard

    If you can’t get in through Telnet, you may be able to get in through FTP. If you can, then simply upgrade the firmware (bootcode first if you have it, then AOS, then SUMX). The card will reboot after each file transfer, so do it as separate sessions. Upgrading AOS will delete SUMX, so it’ll need to be done.

  14. Maher Muhtadi avatar

    One more grateful person here 🙂 Thanks a lot!

    1. Piers Chipperfield avatar

      Glad I could help, Maher.

      1. Aman avatar

        Thank you Piers, this trick saved us a lot of time

        1. Piers Chipperfield avatar

          You’re welcome Aman.

  15. George Curca avatar
    George Curca

    Thanks, it was doing our brains in. Worked.

  16. obidoub avatar
    obidoub

    If telnet doesn’t work you can try SSH.

  17. Tim B avatar
    Tim B

    Putty worked for my case! Thanks for the following up with others solutions to the problem.

  18. Marco avatar
    Marco

    Still works, thanks for the post !

  19. Stéphane avatar
    Stéphane

    Steph
    Thank you very much for your help

  20. Peter avatar
    Peter

    The tips here are very useful, as long as you haven’t locked your interface down as we have due to regulations. Telnet and SSH are not options for us. We only use https to manage the NMC and only turn on FTP when doing upgrades to the firmware. The logout.htm tip above returns the same ‘someone is currently logged in’ screen. So I guess the only alternative is consoling in using a cable.

  21. bilal avatar
    bilal

    Telnet worked thanks

  22. Sparks avatar
    Sparks

    HI, I don’t have the option logout in my choices. I have an apc1500.

    1. Piers Chipperfield avatar

      Have you tried using Steve’s tip from above by replacing login.htm in the address bar with logout.htm ?

  23. Ms. Wong avatar
    Ms. Wong

    I tried the logout.htm comment and it didn’t work. I used SSH telent comment but it says “The remote system refused the connection”. Any thoughts?

    1. Piers Chipperfield avatar

      That suggests the management card isn’t accepting connections via SSH. If you can’t connect via telnet either then your only option is to connect to the card directly with a serial cable, or remove and reinsert the management card into the UPS. I’m 95% sure this is fine to do while everything is powered up but haven’t done it on a live system so if in doubt plan for downtime.

  24. Ms. Wong avatar
    Ms. Wong

    May I ask to write me the telnet command. I used CMD and type telnet IP address. It came back with ‘telnet is not recognized as an internal or external command’ Did I miss something?

    1. Piers Chipperfield avatar

      Telnet isn’t included by default in Windows Vista onwards. You can enable it, but simpler is to download Putty: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

      Run this and select the telnet radio button under “connection type”, then type in the IP address and click “Open”.

  25. Ranga Chisi avatar

    the telnet tip saved me today. Thanx

  26. adytonks avatar

    Thanks for sharing this with us, telnet done the trick. I just opened the ports on the router and away she goes 😉

  27. Mary avatar

    Excellent! Worked perfectly!

  28. Daniel Gil avatar

    Telnet Connection did the trick! Thanks!

  29. Mike M avatar
    Mike M

    Perfect! Thanks for the help! I used PuTTY to telnet to the the console.

  30. Darren avatar
    Darren

    Thanks for the tip,its saved me some hassle.

  31. Loukas avatar
    Loukas

    Thank you very much. Telnet solution worked like a charm.

  32. Afshin Aghazadeh avatar
    Afshin Aghazadeh

    Hello
    thanks to everyone that leave a guide in this forum I’ve read many comments before, and they helped me a lot, but recently I had an issue and none of these solutions worked for me (I mean only establishing telnet and ssh connection, login via ftp to see the event file and using logout.htm method on the person’s system who didn’t log out) my guess is this time someone logged in via private browser then without logging out he closed the browser. Before this, telnet command help me to close previous open session since this didn’t work this time, I go to management via telnet then in the settings I disabled HTTP and HTTPS accessibility then I enabled them again so this cause that open session get close I hope this help you too, but I should note two things first one is during disable and enable process the address of your device is unavailable if you monitor it. Second one is, this method only works if you enable telnet accessibility before the issue happen.

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