Parsec must be explicitly allowed through your system's firewall on both machines.
guide addresses the critical peer-to-peer (P2P) network handshake failure that prevents remote computers from establishing a direct streaming session.
Sometimes, having both IPv4 and IPv6 active causes issues with Parsec’s P2P negotiation. Go to in Windows. Change adapter options. Right-click your network adapter, select Properties . 6023 parsec error exclusive
This method is so effective that many users call it the “exclusive silver bullet” for persistent -6023 errors. You can also combine it with a cheap VPS acting as a relay to reduce latency further.
Parsec attempts to connect directly. If this fails, you can force a specific connection mode. Parsec must be explicitly allowed through your system's
: Manually forward a range of ports (e.g., UDP 8000-8010) in your router's web interface to the host computer's IP address.
Some Internet Service Providers block or throttle the UDP ports Parsec requires, particularly if you are on a public or shared network (school, work, apartment complex). Go to in Windows
If your router cannot dynamically open ports for Parsec, you must instruct it to do so manually. Method A: Enable UPnP (The Quick Route)
: Double routers or restrictive Network Address Translation profiles drop the initialization packets.
On macOS: Go to , and ensure Parsec is set to "Allow incoming connections."