Slippi Failed to Connect to MM Server

Slippi Failed to Connect to MM Server: Troubleshooting Guide

In the world of competitive Super Smash Bros. Melee, Slippi has become an invaluable tool for players to analyze their matches and improve their skills. However, encountering issues like “Slippi failed to connect to MM server” can be frustrating and hinder the overall experience. This article aims to provide a comprehensive troubleshooting guide to help you resolve this problem and get back to enjoying the benefits of Slippi.

1. Understanding the Issue

When you encounter the error message “Slippi failed to connect to MM server,” it means that the Slippi client is unable to establish a connection with the matchmaking (MM) server. This prevents you from accessing online features such as matchmaking, ranked play, and replays. Several factors can contribute to this issue, including network problems, firewall settings, or server maintenance.

To begin troubleshooting, it’s essential to rule out any temporary server maintenance or downtime. Check the official Slippi website or community forums for any announcements regarding server status. If there are no reported issues, proceed with the following steps.

2. Check Network Connectivity

The first step is to ensure that your internet connection is stable and functioning correctly. Start by testing your internet speed using a reliable online speed test tool. If your connection is slow or unstable, try restarting your router or contacting your internet service provider for assistance.

Additionally, check if other online services or games are working properly on your device. If they are experiencing similar connectivity issues, it may indicate a broader network problem that needs to be addressed.

3. Firewall and Antivirus Settings

Firewall or antivirus software on your computer can sometimes interfere with Slippi’s connection to the MM server. To troubleshoot this, temporarily disable any firewall or antivirus software and attempt to connect again. If the issue is resolved, you may need to add exceptions or create rules in your security software to allow Slippi to communicate with the MM server.

It’s important to note that disabling your firewall or antivirus software can leave your computer vulnerable, so make sure to re-enable them once you have identified the cause of the problem.

4. Port Forwarding

Port forwarding is a technique used to allow external devices to connect to specific ports on your router. In some cases, enabling port forwarding for Slippi can help establish a stable connection with the MM server.

To set up port forwarding, access your router’s settings by typing its IP address into your web browser. Locate the port forwarding section and add a new rule for Slippi. The required ports for Slippi are 6119 and 6262. Consult your router’s manual or manufacturer’s website for specific instructions on how to configure port forwarding.


Encountering the “Slippi failed to connect to MM server” issue can be frustrating, but with the troubleshooting steps outlined in this guide, you should be able to resolve the problem and resume using Slippi’s online features. Remember to check for any server maintenance announcements, ensure a stable internet connection, and adjust firewall or antivirus settings if necessary. If all else fails, reaching out to the Slippi community or support team for further assistance is always a viable option. Happy smashing!

About Ambika Taylor

Myself Ambika Taylor. I am admin of For any business query, you can contact me at [email protected]