I mentioned "hardware solutions" in my email... however, the cost of these hardware appliances is pretty high. In theory, you can do the same thing with a properly configured linux server at less than half the price. Of course... the money is in the configuration ;-)
Sincerely, Jason ----- Original Message ----- From: "Ken Seefried" <[EMAIL PROTECTED]> To: ":yegon" <[EMAIL PROTECTED]> Cc: <debian-isp@lists.debian.org> Sent: Sunday, June 17, 2001 10:33 PM Subject: Re: redundancy via DNS > > There are a number of very effect "appliance" style solutions to doing this. > Please have a look at RadWare (WSD) and F5 Networks (3DNS); I have had great > success with both companies. The bonus is that these solutions can > automaticly determine if a server is up. > > Ken Seefried, CISSP > > :yegon writes: > > > we have several servers colocated with several ISP's > > i am trying to sort out some configuration that would ensure good uptime for > > customers > > > > i want to place the html documents of every customer on two separate servers > > connected to separate ISP's > > the dns servers will point to one server and the second one will be just a > > backup, in case the main server goes down we just change the DNS and point > > the affected domains to the backup server. when the main server is back up > > the dns changes back to normal > > > > and now my questions: > > 1. what should the times in zone files be set to to enable the dns change to > > be propagated very quickly, say 5 minutes max. > > is it possible/wise to use TTL=0 > > > > 2. if a domain has 2 name servers set during registration, are both of these > > servers used for lookups? Or is it so that just the primary is querried if > > it works, and the secondary is querried only if the primary is not > > responding? > > > > 3. is this whole idea worth consideration anyway or should I forget it? > > > > > > thanks for answers > > > > Martin Dragun > > > > > > -- > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > > > > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > >