Host Cannot Download Files From VMware vSphere Update Manager Patch Store.

ESX host is not able to scan the baseline and throw error like "Host cannot download files from VMware vSphere Update Manager patch store.  Check the network connectivity and firewall setup, and check esxupdate logs for details."

Check the ESXupdate log at /var/log/esxupdate.log location and will you find the error for this issue.

There are multiple issue like firewall port block, DNS misconfiguration on ESX host, Primary DNS not reachable and secondary DNS not configured.

1. To check and resolve firewall port issue. Check if port 9084 is able to telnet from ESX host to update manager IP. Port 9084 should be allowed between ESX and VC/VUM server.

Command:- # nc -z VC/VUM IP port number  #nc -z 10.10.10.5 9084
if port is not blocked the you will get output like "Connection to 10.10.10.5 9084 port [tcp/*] succeeded!"

But if port is blocked then you will get output like "nc: connect to 10.10.10.5 port 9084 (tcp) failed: Connection timed out"

2. To check and resolve DNS server issue. Make sure Primary and secondary DNS IP are set on ESX host and able to ping/resolve and telnet on port 53, 389 to DNS servers.