wp_http_proxy & port range 30000+

  • Hello, we have been troubleshooting issue with built-in wp_http_proxy feature and still can’t figure out why this is happening.

    We have defined proxy settings in wp-config.php file and noticed that any proxy server that uses ports above 30000 range (31112 for example) does not work. If we use lower port ranges such as 22225 it works as expected.

    We have checked our VPS firewalls and disabled all other plugins on the WP installation. No difference there.

    We have also verified that the VPS can connect to proxies by executing curl commands on cli and even created example php file that makes a call via these proxies. All works as expected (so server itself has no issues with these port ranges).

    This issue only emerges with wp core.

    Error received is “cURL error 56: Proxy Connect Aborted”.

    The page I need help with: [log in to see the link]

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