Softether Vpn Client — Error Code 1

| | Likelihood | Typical Environment | | --- | --- | --- | | IPv6 enabled on virtual adapter | Very High | Windows 10/11 | | Firewall blocking the VPN port | Very High | Corporate networks, home routers | | Insufficient admin privileges | High | Windows (non-admin account) | | Incorrect system time (SSL/TLS error) | Moderate | Old PCs, dual-boot systems | | MTU mismatch (packet fragmentation) | Moderate | Mobile hotspots, DSL connections | | Corrupt virtual network adapter driver | Moderate | After Windows update | | Server-side virtual hub misconfiguration | Low | Self-hosted SoftEther Server |

This is perhaps the for Error Code 1 on Windows 10 and 11. SoftEther’s virtual adapter sometimes struggles with IPv6 dual-stack configurations. softether vpn client error code 1