Transport level error while connecting to http://KSC_Server:13000: SSL authentication failure, certificate is invalid or outdated [MOVED]

  • 18 August 2021
  • 1 reply

Userlevel 2

Hello everybody,

The KSC Server’s IP was changed and all Client PCs were vanished from KSC but while the IP was put as it was before then all previous Client PCs showed. 

Now If we make new Network Agent (standalone) and try to install in  a PC (Win10, Win7) then it’s showing an error that it can not connect with the KSC. But Network Agent has been installed. 

Upon checking the log file there showing 

“Attempting to connect to Administration Server...Transport level error while connecting to SSL authentication failure, certificate is invalid or outdated.”

Log file is being attached, please see.


The environment is -

Kaspersky Security Center version is 11

Network Agent version is ' (b)’


Waiting for a good suggestions.


Thanks in Advance



1 reply


Hi @Deadlock4400 

According the log the IP and/or port 13000 are not being accessible, so make sure that the IP is visible and the port 13000 is not being blocked by firewall, please consult the KB article “Causes of connection issues” : https://support.kaspersky.com/12776#block2  . Note how you can use the klmover.exe utility if the IP address is not correct or if the trust certificate has been broken more details on connecting a client device to the Administration Server. Klmover utility : https://support.kaspersky.com/KSC/SP3/en-US/3911.htm  

(A bat file script can also be customized in the KSC console "as an install package" if multiple computers get the same error). Consult Kaspersky Support for more details by opening a ticket at the support portal : https://companyaccount.kaspersky.com/account/login