Check upstream firewall rules. Ensure TCP ports 80 and 443 are open from the MGT or service route interface to the internet.
A corrupted partial download in the firewall’s local storage can stall subsequent update attempts. Clearing the cache forces a clean download. palo alto unable to download dynamic updates
If your network utilizes an explicit proxy, configure it under Device > Setup > Services > Proxy Server . Ensure the proxy allows CONNECT requests to port 443 for Palo Alto domains. 5. Clear Corrupted Update Cache via CLI Check upstream firewall rules