OpenVPN Client Config Generator

Profile name:

Use a short operator-friendly name for the client profile.

Remote endpoint:

Enter the public VPN listener and port clients should dial.

Transport and device:

Match the server's proto and dev settings before importing the profile.

Routing policy:

Choose how this client should handle server-pushed routes and local route lines.

Local route list:

These become route directives because route-nopull suppresses pushed routes.

Client authentication:

Match the server policy for certificates and username/password prompts.

Certificate material:

Use inline placeholders for a single importable profile skeleton.

TLS control channel key:

Add the control-channel key mode configured on the server.

Data ciphers:

Keep modern AEAD ciphers first unless your server requires a legacy fallback.

Client compatibility:

Use legacy only when the server or client cannot negotiate modern data-ciphers.

Fallback cipher:

Avoid weak or deprecated ciphers unless a legacy server forces them.

Auth digest:

SHA256 is a common baseline; match the server when it requires a specific digest.

TLS minimum:

Lower TLS versions should only be used for tightly scoped legacy compatibility testing.

Server name verification:

Pin the certificate name only when you know the server certificate CN or subject name policy.

Expected server name:

Use the certificate common name or configured verification name, not the URL path.

External certificate paths:

Keep paths relative to the imported profile directory when practical.

TLS key path:

For tls-auth, the generator adds client key direction 1.

Compression:

Leave omitted unless you are matching a known legacy server profile.

Verbosity:

Use a higher value only during troubleshooting.

Add auth-nocache when prompting for credentials

Prevents OpenVPN from retaining username/password material in memory after use.

Add explicit-exit-notify for UDP

OpenVPN uses this only for UDP profiles so servers see clean client disconnects.

Add Windows block-outside-dns for full tunnel

Written only with full-tunnel routing; use when importing into Windows clients that support the directive.

Include section comments

Adds concise comments for handoff and review without changing runtime behavior.

Extra directives:

One directive per line. Use only server-approved client options.

Fix before importing this profile

{{ error }}

Review before handoff

{{ warning }}

{{ result.profileText || '# Fix validation errors to generate the OpenVPN profile.' }}

Directive	Value	Section	Operator note	Copy
No directives generated yet.
{{ row.directive }}	{{ row.value \|\| '-' }}	{{ row.section }}	{{ row.note }}

Check	Status	Detail	Next action	Copy
{{ row.check }}	{{ row.status }}	{{ row.detail }}	{{ row.action }}

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An OpenVPN client profile is a small text file with a large operational role. It tells the client which server listener to dial, which tunnel device to create, which certificate authority to trust, how user or certificate authentication should happen, and what traffic should enter the tunnel after the TLS session is established.

The profile is only one side of a matched pair. A syntactically valid .ovpn file can still fail when the server listens on UDP and the client says TCP, the server expects tls-crypt while the client has no control-channel key, or the route policy sends ordinary internet traffic through a tunnel that was meant only for private subnets. Once real private keys, client certificates, usernames, or shared TLS keys are inserted, the same file also becomes sensitive configuration material.

Common OpenVPN profile decisions and the mistakes they prevent
Profile Area	What It Controls	Common Mistake
Endpoint	Server name or IP address, port, and transport protocol.	Adding a URL path, using the wrong port, or choosing TCP when the server profile is UDP.
Tunnel device	Routed `tun` traffic or bridged `tap` traffic.	Choosing `tap` for a client platform or server setup that only supports routed tunnels.
Trust and identity	CA certificate, client certificate, private key, username prompt, and server certificate checks.	Shipping placeholders, reusing a private key across clients, or omitting expected server-name checks.
Routing	Whether pushed server routes are accepted, blocked, replaced, or supplemented locally.	Creating a full tunnel accidentally, or blocking server-pushed routes without adding the needed local routes.
Compatibility	Cipher negotiation, TLS minimum, compression, and legacy fallback choices.	Keeping old settings for convenience after both server and client can support a safer modern profile.

Two neighboring choices often get confused. A full tunnel asks the client to send ordinary traffic through the VPN, which makes DNS handling and leak prevention part of the profile review. A split tunnel sends only selected destinations through the VPN, which keeps local or public traffic outside the tunnel but depends on accurate private route lists. Neither choice is automatically safer in every environment; the right answer depends on server pushes, client platform behavior, DNS policy, and the access the user is supposed to have.

A generated profile should be treated as an operator-reviewed draft until it has been compared with the server configuration and tested on a limited client. The file format can carry the right structure, but only the matching server, valid certificate material, and the target client can prove that the profile actually connects and sends traffic where intended.

How to Use This Tool:

Start with the server facts, then use the review rows to catch risky or mismatched choices before copying or downloading the profile.

Enter a Profile name, Remote endpoint, and listener port. The remote host must be a DNS name, IPv4 address, or bracketed IPv6 literal without a protocol, path, spaces, or query text.
Set Transport and device to match the server. The default UDP plus TUN routed tunnel fits many remote-access profiles; TCP client or TAP bridged tunnel should be used only when the server and client platform support that profile shape.
Choose the Routing policy. Use pushed server routes, request a full tunnel, ignore pushed full-tunnel redirects, or select Use only routes listed here and enter one IPv4 CIDR route per line with optional gateway and metric cells.
Select Client authentication, Certificate material, and TLS control channel key. Inline mode creates placeholder blocks for a single file draft; external mode writes certificate, key, and TLS key paths that must exist beside the imported profile.
Open Advanced when the server requires specific ciphers, legacy fallback behavior, an auth digest, a TLS minimum, server-name pinning, compression, DNS leak protection for Windows full-tunnel clients, or reviewed extra directives.
Read Profile Review before import. Fix any Error rows and pause on Review rows for choices such as SHA1, TLS 1.0, compression, username-only authentication, missing control-channel protection, or script-capable extra directives.
Check OpenVPN Profile for the final text and Directive Ledger for the generated directive list. Replace placeholders with real certificates and keys, or place the referenced external files correctly, before the client imports the profile.

The output is a client profile draft. It does not create certificates, user accounts, server routes, firewall rules, DNS records, or the OpenVPN server configuration.

Interpreting Results:

The most important result is not just the OpenVPN Profile text. The Profile Review table explains whether the profile has blocking input errors, security choices that need approval, or compatibility settings that should be temporary. The Directive Ledger is useful for comparing the draft against a known-good server profile because it separates endpoint, TLS, routing, authentication, material, and extra directive lines.

A ready summary means the entered fields can produce profile text. It does not mean the server is reachable, the certificate chain is valid, the username will authenticate, the selected cipher list overlaps with the server, or the chosen routes will work on every client platform.

Treat Fix before importing this profile as a stop condition. The profile text is withheld until blocking errors are corrected.
Use Review before handoff as an operator checklist, especially for legacy cipher fallback, compression, weak digest choices, TLS 1.0, and no TLS control-channel key.
When inline placeholders are present, the profile is not import-ready until the real CA certificate, client certificate, private key, and selected TLS key material are inserted.
After import, test connection, DNS behavior, and reachable routes on a limited client before giving the profile to users.

Technical Details:

OpenVPN TLS mode separates connection setup from packet transport. The control channel authenticates peers, negotiates session keys, and carries pushed options. Certificate checks, username prompts, minimum TLS version, and optional tls-auth, tls-crypt, or tls-crypt-v2 material belong to that channel. The data channel then carries tunneled packets using a cipher selected from the negotiated data-cipher list when both peers support modern negotiation.

Client route handling is a policy decision as much as a syntax decision. Accepting pushed routes lets the server decide which networks enter the tunnel. Full-tunnel routing adds a default-route redirect, while redirect blocking filters server-pushed default-route changes. route-nopull leaves route selection to local route directives, which makes the local route list easier to audit and easier to under-specify.

Transformation Core:

OpenVPN client profile transformation rules used by the generator
Input Area	Generated Directives	Rule
Core client mode	`client`, `dev`, `proto`, `remote`, `resolv-retry`, `nobind`	The profile always starts as an OpenVPN client and writes the selected tunnel device, transport, host, and port.
Server identity	`remote-cert-tls server`, optional `verify-x509-name`	Server certificate usage is checked by default; exact-name or name-prefix pinning is added only when an expected server name is provided.
Crypto negotiation	`auth`, `data-ciphers`, optional `cipher` and `data-ciphers-fallback`	Modern mode relies on negotiated data-channel ciphers; legacy modes add fallback directives for older peers.
Routing policy	`redirect-gateway`, `pull-filter`, `route-nopull`, `route`, optional `block-outside-dns`	Only the selected route policy emits route-changing directives, and Windows DNS blocking is emitted only with full-tunnel routing.
Authentication material	`auth-user-pass`, `auth-nocache`, `ca`, `cert`, `key`, or inline material blocks	Username prompts and certificate material follow the chosen authentication mode and material mode.
Control-channel key	`tls-auth`, `tls-crypt`, `tls-crypt-v2`, optional `key-direction 1`	`tls-auth` receives client direction `1`; `tls-crypt` and `tls-crypt-v2` do not need a separate direction line.
Operator additions	Extra directive lines	Extra directives are appended only when they avoid blocked syntax; script-capable directives are flagged for administrator review.

Route Conversion Core:

Local route rows are emitted only when Use only routes listed here is selected. A row begins with an IPv4 CIDR destination and may add a gateway and metric as comma-separated cells, such as 10.55.10.0/24,vpn_gateway,50.

The CIDR prefix is converted to the dotted netmask that OpenVPN's IPv4 route directive expects:

mask = 2^{32} - 2^{32 - p}

Here p is the IPv4 prefix length. For example, 10.55.10.0/24,vpn_gateway,50 becomes route 10.55.10.0 255.255.255.0 vpn_gateway 50. Use real IPv4 prefix lengths from 0 to 32; a route typo outside that range should be corrected rather than trusted.

Validation Boundaries:

OpenVPN profile validation boundaries and review warnings
Check	Boundary	Review Meaning
Remote endpoint	Host text must be a safe DNS name, IPv4 address, or bracketed IPv6 literal without spaces, protocol, path, or fragment text.	The `remote` directive should contain only the server address and listener port.
Remote port	Port must be a whole number from `1` to `65535`.	Out-of-range values cannot name a valid TCP or UDP listener.
External paths	Certificate, private key, and TLS key paths must be simple local paths or filenames.	Complex path text is blocked before it is written into the profile.
Server-name pinning	An expected server name is required when `verify-x509-name` is selected.	Name pinning without a name creates a profile that cannot express the intended certificate check.
Legacy compatibility	A fallback cipher is required for OpenVPN 2.4 or 2.3 compatibility modes.	Fallback directives can keep older peers working, but they should be tied to a migration reason.
Extra directives	Angle-bracket material blocks are blocked, and script-capable directives are flagged for review.	Custom directives can change client behavior outside the guided fields, including script execution hooks.

Several risky choices are review warnings rather than hard errors because legacy deployments sometimes require them. Compression, SHA1, TLS 1.0, username-only authentication, no control-channel key, TCP mode, TAP mode, and legacy cipher fallback should be approved deliberately instead of accepted as harmless defaults.

Security Notes:

OpenVPN client profiles can contain secrets, script-affecting directives, and traffic-routing choices. Review the generated draft as configuration code, not as a harmless text note.

Protect any completed profile that contains a real client private key, client certificate, username prompt reference, tls-auth, tls-crypt, or tls-crypt-v2 material.
Keep compression disabled unless a specific server requires it and the risk has been accepted.
Use verify-x509-name only with a certificate naming policy you understand, especially when using name-prefix matching.
Extra directives that can run or verify scripts should be reviewed by an administrator before the profile reaches end users.

Worked Examples:

A standard laptop remote-access draft might use vpn.example.com, port 1194, UDP, TUN routed tunnel, certificate plus username prompt, inline placeholders, tls-crypt, and modern cipher negotiation. OpenVPN Profile should contain remote vpn.example.com 1194, auth-user-pass, auth-nocache, data-ciphers, and placeholder certificate blocks, while Profile Review reminds the operator to replace key material.

A split-tunnel operations profile can choose Use only routes listed here and enter 10.44.0.0/16 plus 10.55.10.0/24,vpn_gateway,50. Directive Ledger should show route-nopull, route 10.44.0.0 255.255.0.0, and route 10.55.10.0 255.255.255.0 vpn_gateway 50. If a required subnet is missing, the profile can connect while leaving that subnet unreachable.

A legacy appliance might require OpenVPN 2.4 fallback and a fallback cipher such as AES-256-CBC. The profile can still be generated when required values are present, but Profile Review marks legacy cipher compatibility for approval so the setting is not mistaken for a modern default.

A troubleshooting case starts with a pasted endpoint that includes a protocol and profile path. The result shows Fix before importing this profile because the host field contains more than a server name; changing it to vpn.example.com lets the remote directive generate correctly.

FAQ:

Can I import the generated profile as-is?

Only when the profile has no placeholders and every referenced certificate, private key, and TLS key file is in the expected location. Inline placeholder mode produces a profile skeleton that still needs real secret material.

Does the profile generator contact my VPN server?

No. The profile text is assembled in the browser from the entered fields. It does not test server reachability, validate credentials, inspect certificates, or confirm route pushes.

Why does TCP mode trigger a warning?

TCP client mode is valid when the server listens for it, but many OpenVPN remote-access profiles use UDP. The warning is a reminder to match the listener instead of using TCP as a generic fallback.

What does full tunnel routing change?

Full tunnel routing emits redirect-gateway def1 bypass-dhcp, asking the client to send ordinary traffic through the VPN. If Add Windows block-outside-dns for full tunnel is enabled, block-outside-dns is also emitted for compatible Windows clients.

Why did my route row not generate?

The local route list accepts one IPv4 CIDR destination per line, with optional gateway and metric cells separated by commas. Fix unclosed quotes, unsupported gateway characters, missing CIDR notation, or non-numeric metrics before checking Directive Ledger again.

Glossary:

TUN: A routed tunnel device commonly used for IP remote-access VPN profiles.
TAP: A bridged tunnel device used when Ethernet-style bridging is required and supported by the client platform.
Control channel: The TLS-protected channel that handles authentication, key negotiation, and pushed configuration.
Data channel: The encrypted path that carries tunneled client traffic after session keys are negotiated.
Full tunnel: A route policy that asks the client to send ordinary traffic through the VPN.
Split tunnel: A route policy that sends only selected destinations through the VPN.
Control-channel key: A shared or profile-specific key used by tls-auth, tls-crypt, or tls-crypt-v2.

References:

OpenVPN 2.6 Manual, OpenVPN Community.
TLS Control Channel Security in Access Server, OpenVPN.
Security Advisory: The VORACLE Attack Vulnerability, OpenVPN.