You must approve Parsec in Privacy & Security > Local Network to allow it to talk to other devices. 3. Enable UPnP or Port Forwarding
Having multiple routers in one home or a Carrier-Grade NAT (CG-NAT) from your ISP can prevent P2P connections. 6023 parsec error exclusive
Search for "Allow an app through Windows Firewall," click Change settings , and ensure both Private and Public are checked for Parsec. You must approve Parsec in Privacy & Security