Problem and solution when the USG6000 DNS Client cannot perform dynamic domain name resolution

What if the firewall DNS Client cannot perform dynamic domain name resolution?
Symptom
The firewall serves as the DNS Client and has the dynamic domain name resolution function configured. However, it cannot obtain the correct IP address based on domain name resolution.

Operation steps
1. Run the display dns dynamic-host command to check whether the dynamic domain name cache information contains the specified domain name.

If no, check whether the communication between the DNS Client and DNS Server is normal, whether the DNS Server works properly, and whether the dynamic domain name resolution function has been enabled.
If yes, but the IP address is incorrect. Go to step 2.

2. Run the display dns server command to check the DNS Server configuration information. Check whether the DNS Server IP address configured on the DNS Client is correct.

If the DNS Server address is incorrect, run the undo dns server ip-address command to delete the configured DNS Server address and then run the dns server ip-address command to configure a correct DNS Server address.

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