You can change the configuration on the firewall or run the following command to set the high range ports back to their default values: netsh int ipv4 set dynamicport tcp start=49152 num=16383 If you see a different Start Port, the problem may be that the firewall isn't configured correctly to allow traffic through these ports. To verify whether this is your issue, run the following command to see what RPC high port range is configured: netsh int ipv4 show dynamicportrange tcpĪccording to IANA standards, the output should look like this:
#Critical ops check connection fix windows#
In Windows Vista and later versions, the RPC high range ports are 49152-65535 so that's what we want to look for. In this example, since the port exemption for this non-standard range wasn't configured on the firewall, the packets are dropped and the connection fails. For example, if non-standard high range RPC ports have been configured, a network trace will show a successful connection to RPC port 135 followed by a connection attempt using a non-standard RPC port such as 15595. This error typically occurs when either non-standard ephemeral ports are used or when the ephemeral ports are blocked by a firewall. The Operation Manager Server failed to perform specified operation on computer .Įrror Description: The RPC server is unavailable
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RPC communication problems usually cause the client push to fail with an error similar to the following: Problems with RPC communication usually manifest themselves when pushing an agent from the management server. TCP and UDP port 53 for Domain Name Service (DNS)Īdditionally, you must ensure that RPC communications complete successfully over the network.TCP and UDP port 88 for Kerberos authentication.In addition to TCP port 5723, the following ports must be enabled: If this is failing, you will likely receive event ID 2106 on the client agent.
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In Operations Manager, the agent computer must be able to successfully connect to TCP port 5723 on the management server.
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For the latest information about recommended antivirus exclusions for Operations Manager, see Recommendations for antivirus exclusions that relate to Operations Manager). If the Health Service is up and running, the next thing is to confirm that antivirus exclusions are properly configured. Make sure that the Startup type is set to Automatic.Ĭheck whether Started is displayed in Service status. In System Center 2012 Operations Manager, the service name is System Center Management.