ZyXEL Communications P-870HN-51B - V1.0 Manual page 92

Chapter 5 WAN Setup
204.217.0.2. The DNS server is extremely important because without it, you must
know the IP address of a computer before you can access it.
The ZyXEL Device can get the DNS server addresses in the following ways.
The ISP tells you the DNS server addresses, usually in the form of an information
1
sheet, when you sign up. If your ISP gives you DNS server addresses, manually
enter them in the DNS server fields.
If your ISP dynamically assigns the DNS server IP addresses (along with the
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ZyXEL Device's WAN IP address), set the DNS server fields to get the DNS server
address from the ISP.
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P-870HN-51b User's Guide