Server hardening is the practice of changing the server configuration at the network, OS and application layers to minimize its attack surface and maximize resistance to penetration attempts. Follow these recommendations to secure the network and OS:
- Install the latest version and patch of Server.
- Configure Server for HTTPS operation using a CA-signed X.509 (TLS/SSL) certificate. See Configure Server SSL/TLS for more info.
- Harden and secure the operating system and database.
Go to User and Group Management help page for more info.
Follow these recommendations to secure the application:
- Review the Web Application Configuration Hardening Procedures below and apply any that are relevant to your environment and organizational policies.
- Review the Server Administration Hardening Procedures below and apply any that are relevant to your environment and organizational policies.
Anonymous and Guest Accounts
You can handle anonymous and guest accounts through Admin settings. We recommend that you follow these directions:
- Disable user registration. Either enable access via Windows Authentication (IWA) or create accounts as an Admin.
- Consider whether unregistered users will be able to run Public Gallery workflows.
Go to User and Group Management help page for more info.
Server Administration Hardening Procedures
These settings control the behavior of various aspects of Server's functionality related to permissions and other options that can affect the application's overall security posture.
The Gallery Run Mode setting can provide enhanced security controls over workflow execution of potentially malicious actions. By default, the Gallery Run Mode is set to Unrestricted, which means there are no restrictions, and that any workflow can execute. Configuring this setting to Semi-safe or Safe will further protect the Server environment by preventing workflows from reading or writing data to a location that is not within the workflow staging directory or executing workflows containing restricted tools. This is a global setting that applies to the entire Server environment, but administrators can override it with exceptions at the individual workflow level. Go to the Gallery help page to learn more about the Gallery Run Mode.
There are several settings under the Gallery Configuration page, which is accessible to users logged-in to Server with Admin privileges (Profile > Admin). In the section User Settings:
- Set the Default Role dropdown to 'No Access' to prevent users who can login by virtue of an external authentication system (SAML SSO or Integrated Windows Authentication) from having any default view or run access within Server. (Users must be given explicit permissions using criteria beyond mere presence in the external authentication domain.)
- Disable the Users Can Register toggle to prevent unregistered users from signing up for new accounts (only for Built-In authentication; Server cannot add accounts to an external authentication system.)
- Disable the Unregistered Users Can Run Public Workflows on the Homepage toggle to prevent anonymous clients from executing workflows published to the homepage.
As of 22.1 you can configure login attempt timeouts by setting the Enforce Login Attempt Timeout switch (Admin > Configuration > Security Settings > Enforce Login Attempt Timeout).
Web Application Configuration Hardening Procedures
These settings affect how the Server's front-end GUI interacts with HTTP/S clients on the wire.
The default installation of Server uses HTTP (unencrypted) to simplify installation and configuration. We recommend deploying X.509 certificates and enabling Server SSL/TLS (HTTPS) to encrypt the communication between clients and the Server. This affirms the Server’s identity and safeguards the integrity and confidentiality of user sessions. You will need to create an X.509 certificate request (specifying any FQDN-style hostnames clients will use to browse your Server) and have that request signed by a Certificate Authority trusted by your organization. Go to Configure Server SSL/TLS for steps to do so.
The 'Host' HTTP request header is sent by an HTTP client and contains the internet hostname and port number to which the client originally attempted connection.
If you are logged into Server as an admin, you can specify the hosts you want to allow Server to serve in the Allowed Hosts field, found in Admin > Configuration, under the Gallery Settings section.
Use this as a security measure to prevent HTTP host header attacks. Enter fully qualified domain names (
host.domain) 1 per line. Go to the Alteryx Server Configuration help page for more information.
HTTP response headers are sent by Server when responding to requests. You can set custom headers or change Server's default values for existing headers by adding stanzas to the <httpHeaders> section of %ProgramFiles%\Alteryx\bin\server\config\alteryx.config.
Below is the set of headers used internally to harden Server for periodic penetration testing (part of our SDLC.) They may not be compatible with all clients. Depending on your organization's needs and policies you may want to update or tailor some values for your environment.
<httpHeaders> <header name="Cache-Control" value="no-store; max-age=0" /> <header name="Strict-Transport-Security" value="max-age=31536000; includeSubDomains" /> <header name="X-Content-Type-Options" value="nosniff" /> <header name="Content-Security-Policy" value="default-src 'self'; img-src 'self' data:; font-src 'self' data:; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; frame-ancestors 'self'; form-action 'self'" /> <header name="Access-Control-Allow-Origin" value="https://server.domain.tld" /> <header name="Vary" value="Origin" /> <header name="Referrer-Policy" value="no-referrer; strict-origin-when-cross-origin" /> </httpHeaders>