Represents the IP address or host name of the server from which to download updates from Palo Alto Networks. The current value is updates.paloaltonetworks.com. Do not change this setting unless instructed by technical support.

If you enable this option, the firewall or Panorama will verify that the server from which the software or content package is download has an SSL certificate signed by a trusted authority. This adds an additional level of security for the communication between firewalls or Panorama servers and the update server.

Choose the type of DNS service—Servers or DNS Proxy Object—for all DNS queries that the firewall initiates in support of FQDN address objects, logging, and firewall management. Options include:

Enter the IP address of the primary DNS server for DNS queries from the firewall. For example, to find the update server, to resolve DNS entries in logs, or resolve FDQN-based address objects.

(Optional) Enter the IP address of a secondary DNS server to use if the primary server is unavailable.

Set a limit on how fast the firewall refreshes FQDNs that it receives from a DNS. The firewall refreshes an FQDN based on the TTL of the FQDN as long as the TTL is greater than or equal to this Minimum FQDN Refresh Time (in seconds). If the TTL is less than this Minimum FQDN Refresh Time, the firewall refreshes the FQDN based on this Minimum FQDN Refresh Time (that is, the firewall does not honor TTLs faster than this setting). The timer starts when the firewall receives a DNS response from the DNS server or DNS proxy object resolving the FQDN (range is 0 to 14,400; default is 30). A setting of 0 means the firewall will refresh the FQDN based on the TTL value in the DNS and does not enforce a minimum FQDN refresh time.

Specify the length of time (in minutes) that the firewall continues to use stale FQDN resolutions in the event of a network failure or unreachable DNS server —when an FQDN is not getting refreshed (range is 0 to 10,080; default is 1,440). A value of 0 means the firewall does not continue to use a stale entry. If the DNS server is still unreachable at the end of the state timeout, the FQDN entry becomes unresolved (stale resolutions are removed).

If the firewall needs to use a proxy server to reach Palo Alto Networks update services, enter the IP address or host name of the proxy server.

Enter the port for the proxy server.

Enter the username for the administrator to enter when accessing the proxy server.

Enter and confirm the password for the administrator to enter when accessing the proxy server.

Enable the firewall to send logs to Strata Logging Service through the proxy server.

Enter the IP address or hostname of an NTP server that you will use to synchronize the clock on the firewall. Optionally, you can enter the IP address or hostname of a second NTP server to synchronize the clock on the firewall if the primary server becomes unavailable.