The output is an htm file with much information including:. Additional authoritative NS records from server: DC2. Portqry can be used to identify if a port is blocked from a Dc when targeting another DC. If the Dynamic Port range has ports being blocked, use the below links to configure a port range that is manageable for the customer. If the above don't provide a solution to the , use the following Diagnostic logging to gather more information:.
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The following image is an example of an RPC error. There are a few important terms to understand:. A lot of the above information is used in troubleshooting, the most important is the Dynamic RPC port number you get while talking to EPM. Client A wants to execute some functions or wants to make use of a service running on the remote server, will first establish the connection with the Remote Server by doing a three-way handshake.
Many RPC servers in Windows let you specify the server port in custom configuration items such as registry entries. When you can specify a dedicated server port, you know what traffic flows between the hosts across the firewall, and you can define what traffic is allowed in a more directed manner.
As a server port, please choose a port outside of the range you may want to specify below. You can find a comprehensive list of server ports that are used in Windows and major Microsoft products in the article Service overview and network port requirements for Windows.
The response has the server port number, and a subsequent RPC Bind on this port is then allowed to pass. The RPC Port key values discussed below are all located in the following key in the registry:. In this example ports through inclusive have been arbitrarily selected to help illustrate how the new registry key can be configured. This is not a recommendation of a minimum number of ports needed for any particular system. Need more help? Expand your skills.
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See the following example:. This error message may occur if the File and Printer Sharing for Microsoft Networks component is not enabled on the remote computer.
This troubleshooting guide will discuss the events that occur at each phase, how to test these events, and how to identify if the phase completed successfully. Troubleshooting this phase requires verifying that a response is received to the name resolution request and that the response contains the correct IP address for the RPC server.
DNS resolution will be occurring at the client so open the network trace taken from the RPC client machine. You will be looking for one packet that is the query from the client to the DNS server and then the response packet from the DNS server. It will look similar to this:. If the trace does not show a correct IP address returned or you do not see any answer from the DNS server then reference the following resources to help with DNS name resolution troubleshooting.
NetBIOS broadcasts are queries broadcast to all hosts on the local subnet so name resolution is limited to only hosts on the subnet. The handshake should look similar to what is shown below.
It was noted earlier that an RPC Server will register itself and listen on a particular port and IP address of the host computer. In the client side trace it will appear as if the server sent the TCP Reset while the trace from the server indicates the client is the source of the TCP Reset. If the 3-way handshake is successful, continue to the RPC Discovery phase.
The RPC Discovery phase will occur one of two ways. The identifier is different depending on which method is used and the RPC client will know ahead of time which method it wishes to use.
This method is a two-step process. Below is a sample of what this would look like and a step by step explanation below it.
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