Usecase of existing FQDN hosts

Hi intrusus,

It is not advisable to delete predefined FQDN hosts, deleting them might cause some issues. If going through the long list is the issue, you might want to use search feature to sort required FQDN host. 

This details is in help section of the FQDN page: 

The FQDN host page displays the list of all the available FQDN host.

FQDN (fully qualified domain name) hosts allow entities to be defined once and be re-used in multiple referential instances throughout the configuration. For example, www.example.com has an IP address as 192.168.1.15. Rather than remembering the IP address of the intended website while accessing it, you can simply type www.example.com in the browser. The FQDN www.example.com will now be mapped to its respective IP address, and the intended webpage opens. 

Thanks,

Hi H_Patel,

H_Patel said:

It is not advisable to delete predefined FQDN hosts, deleting them might cause some issues. If going through the long list is the issue, you might want to use search feature to sort required FQDN host.

Is there a reason why it might cause some issues? As I know Sophos XG itself is using the defined DNS servers at Network > DNS to resolve hostnames.
The FQDN hosts are just there for user specific rules, aren't they?
Just want to go into the technical background here because it interests me a lot how XG firewall works. :)

I'm not averse to using the search in the list, I just wanted to know why there are so much hosts predefined (this list seems to contain half the Internet... xD) when I never use them in any rule. If I need to allow specific services from providers (such as AWS or Google), I usually create these hosts myself.

Cheers,
Leon

Hi H_Patel,

H_Patel said:

It is not advisable to delete predefined FQDN hosts, deleting them might cause some issues. If going through the long list is the issue, you might want to use search feature to sort required FQDN host.

Is there a reason why it might cause some issues? As I know Sophos XG itself is using the defined DNS servers at Network > DNS to resolve hostnames.
The FQDN hosts are just there for user specific rules, aren't they?
Just want to go into the technical background here because it interests me a lot how XG firewall works. :)

I'm not averse to using the search in the list, I just wanted to know why there are so much hosts predefined (this list seems to contain half the Internet... xD) when I never use them in any rule. If I need to allow specific services from providers (such as AWS or Google), I usually create these hosts myself.

Cheers,
Leon