63212: Acronis Cyber Protect Cloud, Acronis Cyber Protect 15: MMS service cannot be started, error "error 0x30002: CannotBind"

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Last update: 18-11-2022


You want to register a machine with Acronis Agent in the management server. Registration fails. You check Acronis Managed Machine service and notice that it is stopped.

When you try to start the service, you get this error (logged in Windows event logs):
Error 0xb9000b: Failed to initialize network module.
| trace level: error
| line: 0xb957662f70a242f
| file: e:\327\enterprise\service\impl\server.cpp:678
| function: Core::ServerImpl::StartNetworkServer
| $module: mms_vsa64_12420
| error 0x30002: CannotBind
| line: 0xe6f03fbb500414fa
| file: e:\327\enterprise\common\async_ipc\async\io_base_libevent.cpp:371
| function: AsyncIpc::Libevent::IoBase::Activate
| $module: asyncipc_vsa64_12420


Port 9850 required by Acronis Agent is used by another software.


Check which software uses port 9850.

In Windows:

  1. Run:
    netstat -ant | findstr 9850
    to find the PID of the process listening on 9850
  2. Run:
    tasklist /fi "pid eq <PID>
    where <PID> is the process ID found in step 1.

In Linux:

  1. Run:
    netstat -tanp | grep 9850
    to find the PID of the process listening on 9850
  2. Run:
    ps -p <PID> -o comm=
    where <PID> is the process ID found in step 1.

Starting from Acronis Cyber Protect Cloud 21.01 (Build 26226) and Acronis Cyber Protect 15 Build 26172, it is possible to change port 9850 after Agent is installed.

  1. Open the following file for editing:


  2. Add the following line in the network section:


  3. Change 9850 to a different port according to your needs, and save changes to the file.
  4. Restart Acronis Managed Machine Service.

For earlier builds, it is impossible to change this port for Acronis Agent. Please change the settings of the 3rd party application to use another port.