While Apache Maven is designed to handle dependencies automatically, certain scenarios—such as working in restricted air-gapped environments or behind strict corporate proxies—require you to .

To manually download a plugin, you must visit a repository like Maven Central or a vendor’s portal on a machine that does have internet access. For any given plugin, you typically need to download: The file (the executable code). The POM file (which defines the plugin's own dependencies).

Security policies may block .jar file downloads through standard web gateways.