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2 ISP WAN and DNS configure

Hi all,

I configured a second WAN today. It looks good.

Now I have two ISP’s. If WAN1 goes down. WAN2 will take over. Thats what I wanted.

Now I do have an external domain registrar. For example hostgator.com. I have my external IP of my WAN1 in there. It redirects to the domain name for example: WAN1.

When WAN1 goes down, rds.example.com will not work. I have to go manually to the registrar hostgator and change the records to the External IP of WAN2.

This should be different. Is there something that I could change in the firewall? Any address that I can add to my hostgator DNS. So when WAN1 goes down. It keeps working on WAN2.

Scenario1: What if i setup free dns on the interfaces. Is that possible? Then I go to my hostgator registrar and setup a cname from example.freedns to rds.example.com. I remove both a records from hostgator.

 

Scenario2: I add both IP addresses in my registrar and I give them priority. Or is this not possible with a records?

 

Scenario3: I have to buy managed dns (what I dont want)  

 

I hope you understand it. Thank you!

regards



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  • Usually registrars do not provide failover options by default.Second scenario is kind of load balancing and not a failover . I would recommend to go with scenario 3.

    You can purchase dns failover solution from dnsmadeeasy.com.Cost is quite less compared to other providers.

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  • Usually registrars do not provide failover options by default.Second scenario is kind of load balancing and not a failover . I would recommend to go with scenario 3.

    You can purchase dns failover solution from dnsmadeeasy.com.Cost is quite less compared to other providers.

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