Intranet users cannot access the internal server using a domain name, but they can access the internal server using an IP address

Q: Intranet users cannot access the internal server using a domain name, but they can access the internal server using an IP address.

A: Ping the domain name and check whether the public IP address can be parsed. If the IP address cannot be correctly parsed, check whether the account password and DNS information are correct. Configure DDNS software on the PC to check whether the IP address can be parsed. If no error is found in the preceding operations, contact the carrier to check the DDNS server. Check whether the DDNS server synchronizes the updated domain name to the DNS server.
The causes are as follows:
It is used in the scenario where terminals use PPPoE dial-up. The router runs normally when users can access the internal server using IP addresses. DNS resolution is the first step to access a domain name. Because the PPPoE interface dynamically obtains an IP address from a carrier, the DDNS server must send the updated mapping between the domain name and IP address to the DNS server in real time. Check whether the DDNS server synchronizes the updated domain name to the DNS server.

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