Package updates from a local server fail to download. However, the same updates work when a much slower external repository is used. Way are local updates failing?

Proxy servers are typically configured to handle external internet traffic. If the update utility routes all requests through a proxy, requests to the local server are forwarded to the proxy, which cannot resolve or reach internal addresses, causing failures. External repositories work because they are reachable through the proxy as intended.

The question states the external repository works even though it is slower, ruling out internet connection speed as the cause of local server failures.

The scenario confirms external updates succeed, proving the internet is not down and therefore cannot be preventing the local server from responding.

Disk space exhaustion on the server would affect its ability to serve files to all clients equally, not selectively fail for local clients while succeeding for external sources.