Common OpenVPN Errors

  Error: AUTH: Received control message: AUTH_FAILED   Error: Cannot load certificate file cert.crt   Error: Connection Name Could Not Be Connected   Error: Inactivity timeout (--ping-restart)   Error: Insecure Signature Digest Detected   Error: Private key password verification failed   Error: Server Cipher Negotiation Not Supported   Error: Server Encryption Cipher Disallowed   Error: Socket bind failed on local address   Error: TCP: connect to address failed, will try again in 5 seconds   Error: The command "auth-federate" or one of its parameters is invalid   Error: The TAP system extension could not be loaded   Error: The TAP system extension was blocked from loading   Error: TLS Error: TLS key negotiation failed to occur within 60 seconds   Error: Unsafe OpenVPN command detected   Error: Unsupported TLS Protocol Detected   Error: Viscosity Helper Tool Disabled   Error: write to TUN/TAP : Input/output error (code=5)   Error: You must define CA file (--ca) or PKCS#12 file (--pkcs12)   Note: Unable to redirect IPv4 default gateway: VPN gateway parameter is missing   Time Machine Backups Could Not Be Disabled   Warning: A connection reset occurred with a legacy cipher command present   Warning: Bad compression stub decompression header byte   Warning: Split DNS is being used however no DNS domains are present   Warning: The block-outside-dns option has been ignored

Common Questions

  Can I use both iCloud Private Relay and Viscosity?   Community Contributions   How Do I Find Out Who My VPN Provider Is?   How Do I Transition to Viscosity from Tunnelblick?   How Do I Transition to Viscosity from Windows OpenVPN GUI?   How Do I Use Time Machine Through a VPN Connection?   Why Do My VPN Connections Disconnect On Sleep?

Documentation

  Advanced Configuration Commands   Connection Settings   Getting Started With Viscosity (Mac)   Getting Started With Viscosity (Windows)   Installing Viscosity (Mac)   Installing Viscosity (Windows)   Introduction To VPNs   OpenVPN Configuration Generator   Security of Updates & Outbound Connections   SparkLabs Security Documentation   Using Viscosity   VPN Service Providers

Enterprise

  Bundling Viscosity with VPN Connections & Preferences (Mac)   Bundling Viscosity with VPN Connections & Preferences (Windows)   Common Deployment and Management Questions   Deploy Viscosity Windows under a GPO Group Policy Environment   Deploying Viscosity on macOS using Jamf Now   Deploying Viscosity on macOS using Munki   Exporting and Distributing Connections   License Types

Features

  Conditional Connections   Configuring DNS and WINS settings   Controlling Viscosity with AppleScript (Mac)   Controlling Viscosity with Scripting (Windows)   Managing and Deleting Saved Credentials   Preventing Network and DNS Traffic Leaks   Routing Traffic For Websites & Applications   Running AppleScripts When Connected/Disconnected   Running Batch/VBS Scripts when Connected/Disconnected   Sharing Credentials and Scripts with Multiple Connections   Single Adapter Mode (Windows)   Using Multiple VPN Connections Simultaneously   Using Tokens/Smartcards (PKCS#11)

Purchasing & Registering Viscosity

  Downloading An Invoice   Educational Pricing   Information for Software Resellers   Invoice Payments Via Check or Bank Transfer   License Details Are Not Accepted   License Email Has Not Arrived   License Upgrades and Volume Extensions   Purchasing Viscosity   Refund Requests   Registering Viscosity   Resending License Details   Retrieving Your Receipt Or Transaction Number   Student and Staff Educational Discount   Updating License Contact Details   Using Your License On Multiple Computers   Viscosity License Inclusions

Troubleshooting

  Backing up Viscosity's Settings   Logs and Information to Provide Support Staff   Losing Network Connectivity Once Disconnected   Migrating from OpenVPN 2.3 to OpenVPN 2.4   Migrating from OpenVPN 2.4 to OpenVPN 2.5   Migrating from OpenVPN 2.5 to OpenVPN 2.6   Problem Saving Details Into The Keychain   Troubleshooting Connection Problems   Troubleshooting DNS Problems   Troubleshooting Viscosity Problems (Mac)   Troubleshooting Viscosity Problems (Windows)   Uninstalling Viscosity (Mac)   Uninstalling Viscosity (Windows)   Using Viscosity Beta Versions   Viewing the Console Log   Viewing the Event Viewer   Viewing the OpenVPN Log

Two-Factor Authentication Setup Guides

  Duo Security Two-Factor Authentication with OpenVPN and Viscosity   TOTP Two-Factor Authentication with OpenVPN and Viscosity   YubiKey OTP Two-Factor Authentication with OpenVPN and Viscosity   YubiKey U2F Two-Factor Authentication with OpenVPN and Viscosity

VPN Server Setup Guides

  Creating Certificates and Keys for your OpenVPN Server   Introduction to Running an OpenVPN Server   Setting up an Obfuscation server with Obfsproxy and Viscosity   Setting up an OpenVPN server with CentOS and Viscosity   Setting up an OpenVPN server with DD-WRT and Viscosity   Setting up an OpenVPN server with Netgear and Viscosity   Setting up an OpenVPN server with Okta Single Sign-on Web Authentication and Viscosity   Setting up an OpenVPN server with OPNsense and Viscosity   Setting up an OpenVPN server with pfSense and Viscosity   Setting up an OpenVPN server with RCDevs WebADM, U2F and Viscosity   Setting up an OpenVPN server with Red Hat Linux and Viscosity   Setting up an OpenVPN server with Sophos UTM and Viscosity   Setting up an OpenVPN server with Sophos XG and Viscosity   Setting up an OpenVPN server with Synology and Viscosity   Setting up an OpenVPN server with Tomato router and Viscosity   Setting up an OpenVPN server with Ubiquiti EdgeRouter (EdgeOS) and Viscosity   Setting up an OpenVPN server with Ubuntu and Viscosity   Setting up an OpenVPN server with VyOS and Viscosity