---
title: "Multiplicity Ports"
canonical: "https://support.stardock.com/space/SHC/1345028118/Multiplicity%20Ports"
format: markdown
---
## Multiplicity Ports and Files

### Ports

Multiplicity Service 30564  
Multiplicity Clipboard 30565  
Multiplicity Audio Service 30567  
Multiplicity Remote Screen Service 30569 (For Multiplicity 3 only)  
Multiplicity Application (Remote screen control)

### Files (whitelisting)

MPRDP64.EXE (For Multiplicity 3 and 4 only)  
Multiplicity Application (clipboard) Multipl2.EXE  
multi2_64   
multisrv64  
multiplv64

All ports are TCP.  The executable names above are for whitelisting the applications within a software-based firewall. 

### Windows Firewall

![image-20240122-145353.png](media://5a41a95c-8cb3-4931-badf-bf951bfe43a3)

### Allowed Apps

Also in Windows Firewall, all Multiplicity core function need to be in ‘Allowed Apps’

![image-20241115-160126.png](media://fa7cd245-587b-4a1f-9be3-7d71c992ffde)

To easily rewrite the rules for Multiplicity, you can use this batch file to do so:

[https://cdn.stardock.us/support/uploads/MPPortFix.zip](https://cdn.stardock.us/support/uploads/MPPortFix.zip)

> 📝 You would want to run the batch file on all Multiplicity PCs to ensure the rules are consistent on all PCs.

## Changing Multiplicity Ports 

These are the keys you will need to add \ edit. PLEASE back up what you have now prior to changing anything. These are examples are for 64-bit machines.

### Primary - controlling other machines

WinKey + R, regedit, enter.  Navigate to the following using the name of the Secondary machine you want to connect to; SDROHAN-TEST is the Secondary MP machine in this example

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Multiplicity2\Machines\SDROHAN-TEST]

"Name"="SDROHAN-TEST"

"DisplayName"="SDROHAN-TEST"

"DynamicIP"="1"

"Address"="10.8.15.109"

"Passkey"="1101"

"LastWorking"="10.8.15.109"

"Port"="17"

Note the addition of the string value Port=17. You can choose what ever port you like here (excluding the know commonly used ones of course). 

### Primary - what itself uses

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Multiplicity2\Security]

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Multiplicity2\Security\Ports]

"OverridePort"="1"

"OverridePortPort"="17"

"OverridePortPort2"="55"

OverridePortPort2 is the clipboard port. Again, use any port you like here.

### Secondary

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Multiplicity2\Security]

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Multiplicity2\Security\Ports]

"AllowNonRoute"="1"

"OverridePort"="1"

"OverridePortPort"="17"

"OverridePortPort2"="55"

OverridePortPort2 is the clipboard port. Again, use any port you like here. 

Running a command prompt as admin and netstat -a will show that it is now listening on the new ports

## Multiplicity Port Troubleshooting

For any connection issues, the path of least resistance it always a an [uninstall \ reboot \ reinstall](https://support.stardock.com/space/SHC/1347158073/Multiplicity+purging+and+re-installing).

If that fails, please see [Multiplicity Connection issues 101](https://support.stardock.com/space/SHC/1287946260/Multiplicity+Connection+issues+101)