SeedStack has the ability to setup the JVM-wide proxy from configuration and/or environment variables.

Basic authentication HTTPS tunneling is disabled by default, starting from Java 8u111. This means that HTTPS proxies relying on basic authentication won’t work out of the box.

To re-enable the basic scheme, remove the Basic term from the jdk.http.auth.tunneling.disabledSchemes system property, by setting it to empty or any relevant value.

More details at

Environment variables

SeedStack will automatically configure the JVM proxy if the following environment variables are detected:

Variables http_proxy and https_proxy for, respectively, HTTP and HTTPS protocol proxying:


Default port is 80 for HTTP proxying and 443 for HTTPS proxying. Variable no_proxy for a comma-separated list of hostname exclusion patterns:



  # Proxy mode (defaults to AUTO)
  # URL for HTTP protocol
  httpProxy: (String)
  # URL for HTTPS protocol
  httpsProxy: (String)
  # List of hostname patterns for proxy exclusion 
  noProxy: (List<String>)

To dump the proxy configuration options:

mvn -q -Dargs="proxy" seedstack:config

The httpProxy, httpsProxy and noProxy configuration options have the same syntax as their environment variable counterparts and will override them if both are present.

Proxy mode takes two useful values:

  • AUTO which will configure the proxy when environment variables or configuration options are present.
  • DISABLED which will skip proxy configuration, allowing to customize proxy configuration manually if needed.


SeedStack will display the effective proxy configuration in the logs at application startup.


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