settings.xml

<settings>
  <mirrors>
    <mirror>
      <id>central-proxy</id>
      <url>https://repo.labs.intellij.net/central-proxy</url>
      <mirrorOf>central</mirrorOf>
    </mirror>
  </mirrors>

  <profiles>
    <profile>
      <id>use-internal-repo</id>
      <repositories>
        <repository>
          <id>central</id>
          <url>https://repo.maven.apache.org/maven2</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
      </repositories>
    </profile>
  </profiles>

  <activeProfiles>
    <activeProfile>use-internal-repo</activeProfile>
  </activeProfiles>
</settings>