Workaround to Solve Composer Installation Timeout Error

This article provides a guide for how to use a workaround to solve Composer installation timeout error.


While installing Composer, it's possible to get the following error message:

PHP Warning:  copy( failed to open stream: Connection timed out in Command line code on line 1

Workaround to Solve Composer Installation Timeout Error

In this scenario, we recommend to run the following command as root (or equivalent) user:

sudo sh -c "echo 'precedence ::ffff:0:0/96 100' >> /etc/gai.conf"

Now reattempt your original installation command and you should now get the expected installation steps and confirmation.

Explanation of Issue

This error is related to IPv6 network configuration issues, compounded by the server's preference for IPv6 connection, causing the connection to fail.

By executing the above workaround, the server will default to IPv4 connection to the Composer repository.

  • composer, installation, workaround, ipv6
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