【BBC】BBC2.5.3 prompts that the network connection failed when filling in the serial number authorization — caused by DNS filling error
Problem Description
BBC2.5.3 device prompts that the network connection failed when filling in the serial number authorization
Process——
- Network connection failure, usually the BBC device cannot access the Internet
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Check the IP and gateway address configured on the device and find that there are no errors in the entry. And other devices in the intranet can access the Internet normally if they fill in the same gateway
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Check the DNS configured on the device again and find that the configured 114.114.114.144 is incorrectly filled in with DNS, which makes it impossible to resolve the domain name. When filling in the serial number to obtain authorization, you need to communicate with the domain name vls.sangfor.com.cn, so the DNS must be able to resolve the domain name normally.
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- Change the DNS to 114.114.114.114 and it will be normal
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Root cause
The device cannot resolve the domain name normally.
solution
Modify the device's DNS to 114.114.114.114
Suggestions and Conclusion
When a BBC device obtains online authorization, it is required that the device be able to resolve the domain name and access the Internet normally. The above case is caused by an error in DNS entry. However, if the DNS entry is correct and it is an available DNS, and such an error still occurs, you need to check the network environment, for example, whether there is a network security device blocking the BBC device from accessing the Internet.
Original Link
https://support.sangfor.com.cn/cases/list?product_id=63&type=1&category_id=19664&isOpen=true