Dns forwarders not validating

15-Aug-2019 08:13 by 2 Comments

Dns forwarders not validating

You also get the benefit of having the ISP cache most of the frequently-used DNS queries for your country or geographical region in their DNS servers’ cache, further improving DNS query performance.In all these cases you will need the correct names and IP addresses of your ISP.

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When you make a change to these DCs, you must remember to also change the forwarders, firewall rules and any other manual configuration settings you made.

You do not have to perform any additional configuration.

You can find an updated list of root hints at ftp://internic.net/domain/db.cache.

Which is the best decision, to use Root Hints, or use my local ISP’s DNS servers as forwarders? I recommend using your ISP DNS servers as forwarders. By using your ISP’s DNS servers as forwarders you will have a much lower number of hops to reach your ISP DNS server when compared to the number of hops needed to access the root hints.

ISP DNS servers are quite reliable and do not change that often, a vast improvement over the last ten years.

You want to have more than one DNS server for obvious redundancy purposes.

When you have two or more DNS servers, you can configure one of them, some of them, or all of them to use forwarders.

You do not need to worry about this if you use Root Hints.

One last thing to remember when you are about to perform changes in your Domain Controller topology such as adding, removing or changing IP addresses of DCs.

Note: You can also configure your server to forward queries to different servers depending on the DNS suffix that is specified in the DNS query.

To do so, configure conditional forwarding appropriately. If you only have one DNS server, you may want to configure it as a forwarder.

So...let's say I set up DNS forwarders in a Windows DNS server and then query using nslookup (or something else? Can I actually see where the Windows DNS server is querying its forwarder, which forwarder it ended up using, and the response from that forwarder?