Configuring your network for Ditto
For Use with Ditto Receiver Only
This article only applies to organizations using Ditto tvOS Receiver or Ditto Windows Receiver. These network instructions do not apply to other Ditto receiver types (Chromecast, Apple TV 3, and older).
- Make sure TCP ports 55200 - 55205 are open
- Ensure proper network traffic routing if using subnets
- Discovery protocols such as mDNS, Bonjour, and multicast are not required
- Ditto works with proxy servers if needed
Open TCP Ports
Ensure the devices on your network allow communications from TCP port 55200 - 55205. This is the port that Ditto uses to route sender and receiver communications. Some firewalls block ports 55200 - 55205 traffic. When organizations have trouble connecting to Ditto after initial setup, this often resolves the problem.
Opening TCP ports 55200 -55205 does not create any known security vulnerabilities.
Ensure Proper Subnet Traffic Routing
Subnets, referred to as VLANs in certain cases, are frequently used in corporate and school networks to keep device traffic separated from other device traffic. For example, subnets can keep discovery traffic such as mDNS, Bonjour, and multicast announcements from flooding to other networks. This traffic policing and traffic shaping can prevent devices from discovering each other, such as the Ditto Receiver on a corporate network and guest devices on the guest wifi.
Fortunately, Ditto will work even if your network requirements dictate that you must have separate subnets. Allow bidirectional IP routing between the subnets that support the Ditto Receiver and end-user devices. If you do not want to route all network traffic between subnets, you can selectively route network TCP port 55200 - 55205 traffic between the subnets.
Most screen sharing solutions rely on discovery protocols such as mDNS, Bonjour, or multicast announcements for user devices to find and connect to a receiver. These protocols work fine on a simple network, but they don't scale well when there are hundreds of devices on different networks.
Ditto doesn't require any of these protocols to work. This means you can disable multicast, Bonjour, and mDNS on your network entirely and Ditto will still work great. This also allows you to simplify your network by removing VLANs or subnets that only serve to keep multicast traffic from flooding to other networks.
Ditto also works with proxy servers.