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1answer
100 views

open source geolocation aware authoritative DNS server with edns-client-subnet support

geoip-enabled authoritative dns server is quite easy to find - bind9 with patch can do it, powerdns as well. but the problem starts when server receives DNS query from global public resolvers like ...
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3answers
140 views

How can I use dig(1) to test GeoDNS resolution for a specific IP?

There's a rumour that public domain name resolvers, like Google Public DNS, are still supposed to work with GeoDNS, because there's some field in the requests that lets them specify for which IP ...
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0answers
96 views

FailoverDNS, GeoDNS & CDN : How to make them work together?

I have servers on every continent, totalizing 10 servers (or pools of servers with one public IP) totally. I have successfully implemented Failover DNS, so that if one server stop responding, the ...
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3answers
3k views

What is the difference between Anycast and GeoDNS / GeoIP wrt HA?

Based on the Wikipedia description of Anycast, it includes both the distribution of a domain-name-to-many-IP-mapping across many DNS servers as well as replying to clients with the most geographically ...
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1answer
243 views

How to host a single website on multiple geographically-diverse servers

I currently have 2 servers, using cPanel/WHM. The first one is a VPS hosted in London (we'll call it "international") and the second one is a dedicated server located in my country (we'll call it ...
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2answers
359 views

DNS setup for website on geo redundant servers

Let's say: I have a website written in English and shown on www.example.com. The website is on a US server now (based on cPanel/WHM) at the IP address 192.0.2.0. I can manage the DNS of example.com ...
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10answers
12k views

Multiple data centers and HTTP traffic: DNS Round Robin is the ONLY way to assure instant fail-over?

Multiple A records pointing to the same domain seem to be used almost exclusively to implement DNS Round Robin as a cheap load balancing technique. The usual warning against DNS RR is that it is not ...
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1answer
570 views

Could a Geo-DNS create availability issues?

Geo-DNS can be used to balance traffic across data-centers. I found this (old) article where it is described why Geo-DNS implies availability issues if one of the IPs (data centers) goes down. Could ...
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5answers
13k views

Geo-DNS providers? [closed]

We've got a website visited by users mainly in the USA and UK. The site will be run on servers in both these locations. We would like to use a DNS service to direct users to the nearest server, but ...