To resolve the issue please do the following on both sides, publishing and subscribing:
1. Stop QCS Service.
2. Add the Internet key under HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc
3. Under the Internet key, add the values Ports (MULTI_SZ), PortsInternetAvailable (REG_SZ), and UseInternetPorts (REG_SZ).
a. Ports (multi string value) 5000-6000
b. PortsInternetAvailable (string value) Y
c. UseInternetPorts (string value) Y
4. Restart the server. All applications that use RPC dynamic port allocation use ports 5000 through 6000, inclusive.
5. Start QCS Service.