What router brand are you using?
Your router is not allowing the peer-to-peer connection through.
your antivirus and try connecting via Parsec.
: Some ISPs use "Carrier-Grade NAT," which prevents devices from having a unique public IP. tracert 1.1.1.1 6023 parsec error exclusive
Fixing the error requires diagnosing both the host (the powerful computer sending the stream) and the client (the device receiving it). Work through these fixes sequentially. 1. Configure Software Firewalls and Network Profiles
Enforcing standard VPN tunnels can force routing traffic through a clean, unrestrictive remote server.
You must contact your ISP's customer support line and explicitly request a Static Public IP Address . Alternative Solutions and Workarounds What router brand are you using
If UPnP is disabled for security reasons, you must manually forward ports to your host PC's static local IP address:
: Ensure your network is set to "Private" rather than "Public," as public profiles often have stricter firewall rules that block Parsec. Network & Advanced Troubleshooting
Update your Parsec settings to use these specific ports under the tab. 4. Adjust Host Networking Settings : Some ISPs use "Carrier-Grade NAT," which prevents
Restrictive CGNAT or locked campus networks where you lack router admin rights.
| Secondary Code | What It Means | What to Do | |----------------|---------------------------------------------------------------------|----------------------------------------------------------------------------| | -11000 | UPnP is disabled or not supported by the router. | Enable UPnP or fall back to manual port forwarding. | | -11010 | UPnP is disabled in Parsec’s own settings. | Open Parsec settings → check “Enable UPnP.” | | -11011 | Guest Wi‑Fi network blocking UPnP. | Switch to a private network or use Tailscale/ZeroTier. | | -11012 | Carrier‑grade NAT (CGNAT) detected. | Request a public IPv4 from your ISP, or use Tailscale. | | -11013 | Double NAT detected. | Place your ISP modem in bridge mode or port‑forward twice. |
Since Parsec Build 150‑99, the -6023 error is often accompanied by a second numeric code. Understanding these can drastically reduce your troubleshooting time:
: 8000 to 8002 (Expand to 8011 if hosting more than 2 guests) Local/Internal IP : The Static IP address of your Host PC. Save the rule and reboot your router. 🏢 Step 4: Diagnose Carrier-Grade NAT (CGNAT)