Ask How to dns autofailover


#1

Hi All

I have some problem about dns autofailover. i have 2 isp and i have mail server in my network. if isp A down can mail server migrate to another ISP

here we capture topologi. is anyone implement this dns autofailover please share it will be greatfull


Thnx

Tri


#2

Hi Tri,
It’s quite nice Inbound Load Balancing functionality that you can rely on Peplink’s Balance.
For more detailed, visit demo page at http://peplink.com/demo/ You can see what could and should be done.
BTW, you are welcome to visit our site for more… :slight_smile: because Balance is our really important solutions not just selling boxes: http://innotel.com.vn/supportdetail.php?id=109&cid=32.
We’ve got quite a lot cases that provide 100% uptime for enterprises with 500-1000+ mailboxes/users.
Regards.


#3

Hi Tri:
1- Under your DNS Server: Create a new MX record (say mail2.mycompany.com). Assign it preference 20 (less preferred so it will be used only if the first ISP is down).
2- On the peplink configure NAT mapping between your mail server address and the two ISP addresses (you have to reserve on address from the new ISP range for the mail server).
3- Make sure the new ISP creates a PTR record for your chosen mail server address.
4- If you are using Web Mail publishing along with SMTP, then you need to configure DNS on the peplink as well (refer to peplink knowledge base for more information)