-----Original Message----- From: "<Lawrence K. Chen>", "P.Eng." <lkc...@ksu.edu> Date: Monday, June 17, 2013 2:55 PM To: Gaurav Kansal <gaurav.kan...@nic.in> Cc: "bind-users@lists.isc.org" <bind-users@lists.isc.org> Subject: Re: Health Check feature in BIND ?
>----- Original Message ----- >> Dear All, >> >> I was just thinking whether it is possible to have a some type of >> health checking of servers through BIND DNS Server and DNS Server >> should replied to clients based on that only. >> >> >> >> i.e., Suppose I have two entries of www record for domain xyz.in >> having ip address 10.1.1.10 and 10.2.2.10. >> >> Now I want that my DNS Server should check whether the server is up >> or not before replying to clients. >> >> If one is down, then DNS server should reply the IP address of the >> second one. >> >> >> >> Although this is not a DNS Job and we should use Load-Balancer for >> this. >> >> But I just wanna to check whether this feature is available in Bind >> or in any Open-Source Program which in turn can be combined with >> BIND to achieve the desired result. >> > >Well, doesn't DNS kind of already do this...if the first DNS server isn' >up, then the user's resolver will timeout and try the next resolver.... For DNS/MX yes, but I didn't read that as a limitation of the original request (e.g. how would you do the same auto-redirect with web or other server types -- round robin alone can be particularly problematic). You could certainly handle the more generic case with commercial appliances, or a bit of tinkering on a budget. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users