This is a sub-page of the Network Troubleshooting Guide. To return to the start of the Guide, please click the above image or click here.
PLEASE NOTE!
This portion of the Network Troubleshooting Guide is for players who are encountering connectivity issues while playing Marathon who have worked through the other basic troubleshooting steps included in the rest of the guide.
The following troubleshooting suggestions are more advanced and can help resolve more complicated connection issues.
UPnP Settings
- When possible, Bungie recommends players use UPnP.
- If players cannot use UPnP and are having issues playing Marathon, they should use Port Forwarding instead.
- It is not recommended to enable both UPnP and Port Forwarding at the same time.
- UPnP is REQUIRED if players use more than one device to play Marathon on the same network simultaneously.
SECURITY RISKS OF USING UPNP
UPnP opens access to a router or modem to allow an internet connection to connect with others, which is how Marathon connects players together inside the game. Due to this open access, however, people with bad intentions can use malicious software to cause harm to a network if the UPnP setup is poorly designed within a router or modem. Players may want to research how well their router's or modem's UPnP is designed, and then decide if UPnP is worth using or not.
Players can also use Port Forwarding instead of UPnP, which is more difficult to set up due to manually adding information into a router or modem, but is generally safer for a network.
Setting up UPnP
WARNING
Changing the wrong settings on a router or modem can lead to losing access to the internet. Be careful when modifying a router's/modem's settings. Consult the device's manual or documentation before beginning this process.
- Log in to the router’s/modem's Control Panel in your computer's internet browser
- This is usually done through an internet browser by navigating to the router’s internal IP address (for example, http://192.168.1.1 or http://192.168.254.254)
- Consult the router/modem’s user manual for help accessing the control panel
- Find the “UPnP” setting, usually located under the “LAN” or “Firewall” category
- Consult the router/modem’s user manual for help locating the UPnP setting
- Enable UPnP and "Save" the changes
- Disconnect and reconnect all devices on the network
Port Forwarding
Players who do not use UPnP will likely need to use Port Forwarding to allow all the connections Marathon needs.
WARNING
This is a technical process that can be slightly different for each type of router/modem. Changing the wrong settings on the router or modem can lead to losing access to the internet or even losing access to the router’s or modem's control panel! Consult the manufacturer’s manual that came with the device before beginning this process. A full reset of the router or modem may be necessary if a loss of internet occurs!
Opening and Forwarding Ports
Forwarding a port routes an outside internet connection inside the router to use a specific port that has been opened.
- Ports that Marathon uses for incoming internet connections may need to be port-forwarded.
- Forwarding only affects incoming internet connections.
- Any ports that a player may want to forward must also be open.
Opening Ports
- Opening ports may help solve some issues with a player's network connection.
- If the router is blocking or slowing internet speed on some ports, they will need to be opened.
- If the router/modem’s firewall settings (a router's security system) are set to ALLOW incoming internet connections by default, opening ports are as simple as making sure there are no firewall rules that specifically block the connections on the required port(s).
- If the router/modem’s firewall settings are set to DENY connections by default, a new firewall rule has to be created that specifically allows traffic on the required port(s).
Port Forwarding won't work with two instances of Marathon connecting to the same internet connection
- Each router/modem is different. Players should consult their router/modem’s user manual for detailed instructions on how to set up port forwarding.
- It is recommended that players also assign a Static IP address (a non-changing internet address) to their system to make port forwarding easier.
- Players who plan to use more than one system to play Marathon on the same network simultaneously will encounter connection issues when using Port Forwarding. Players are REQUIRED to use UPnP to play Marathon on more than one system on the same network simultaneously.
SECURITY RISKS OF USING PORT FORWARDING
Ports are usually closed in a router/modem to help prevent unauthorized access to a home internet network. Opening ports on the router/modem may decrease the overall security of the home network.
Ports that should be OPEN
| Platform | TCP Destination Ports | UDP Destination Ports |
| Xbox Series X|S | 53, 80, 3074 | 53, 88, 500, 3544, 3074, 27015-27200 |
| PlayStation 5 | 80, 443, 1935, 3478-3480 | 3478, 3479, 49152-65535, 27015-27200 |
| PC | 80, 443, 1119-1120, 3074, 3724, 4000, 6112-6114 7500-7509 30000-30009 |
80, 443, 1119-1120, 3074, 3097-3196, 3724, 4000, 6112-6114, 27015-27200 |
Ports that should be FORWARDED
| Platform | TCP Destination Ports | UDP Destination Ports |
| Xbox Series X|S | 3074 | 88, 500, 3074, 3544, 4500 |
| PlayStation 5 |
|
3074, 3478-3479 |
| PC | N/A | 3074, 3097 |
Network Troubleshooting Guide Directory
This is a sub-page of the Network Troubleshooting Guide, which is designed to help players through the recommended steps for troubleshooting network connectivity issues that may be impacting their ability to play Marathon. Please click the appropriate button below to return to the start of the guide or to read through the other pages.
Error Codes Network Setup Common Hardware Issues
Optimizing Connections Advanced Troubleshooting Return to Start
