Comments (4)
Thanks for the post. You can configure ECS override option and set the subnet for one of your ISP. But that will cause all other clients too get DNS responses which are "closer" to that specific ISP and may increase delays especially of your other ISPs have peering setup for popular CDN providers.
It would be best that you setup 3 different DNS server instances and then assign clients the DNS server IP address that you wish they should use.
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I've used ECS Override, but ECS fails to send the /24 prefix. If the IP address is filled in /32 it works, I hope that the ECS override can use the prefix /24 or lower.
Thanks for the details. How did you find out that its not sending ECS when /24 subnet is set? I would suggest that you use Wireshark/tcpdump and check the request and post details here.
I have rebooted the system, at this time I entered 0.0.0.0/0 and it works fine, I have also tried using a lower prefix from /1 to /32 and everything works fine.
sorry for the problem that shouldn't exist 🙏
from dnsserver.
Thanks for the post. You can configure ECS override option and set the subnet for one of your ISP. But that will cause all other clients too get DNS responses which are "closer" to that specific ISP and may increase delays especially of your other ISPs have peering setup for popular CDN providers.
It would be best that you setup 3 different DNS server instances and then assign clients the DNS server IP address that you wish they should use.
I've used ECS Override, but ECS fails to send the /24 prefix. If the IP address is filled in /32 it works, I hope that the ECS override can use the prefix /24 or lower.
from dnsserver.
I've used ECS Override, but ECS fails to send the /24 prefix. If the IP address is filled in /32 it works, I hope that the ECS override can use the prefix /24 or lower.
Thanks for the details. How did you find out that its not sending ECS when /24 subnet is set? I would suggest that you use Wireshark/tcpdump and check the request and post details here.
from dnsserver.
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