[NTLUG:Discuss] "Back up dns server"?

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> Date: Wed, 5 Dec 2007 05:26:54 +0000> From: leroy_tennison at prodigy.net> > > > Sorry for the confusion, What I means is when the file setting is massed up, the request packets can not go to your server. for example: > > you have web site AAA.com with IP 1.2.3.4 on server BOX1, your DNS server have set up correctly. you server BOX1 is behind firewall, and your firewall knows to sent the traffic with IP 1.2.3.4 to BOX1. Everything at this point is good.> > > > one day, something happened on yor firewall (device), it is dead and doesn't route the request packets to 1.2.3.4. This is what I mean firewall broken.> > How do you keep yor AAA.com site still live at this point?> > > > if we have the "another" dns server "says" AAA.com have another ip 1.2.3.5, will it solve the problem, right? > > this my question:> > can we have one dns server says AAA.com's ip is 1.2.3.4 and> > another dns server says AAA.com's ip is 1.2.3.5?> > > I've seen several replies but I haven't seen a good solution and I don't > even know if there is a good one. here's the issues I see.> > "one dns server at 1.2.3.4 and another at 4.5.6.7"> > If they have the same DNS name or even alias how do you determine which > one is used when. A DNS server is going to locate one record first and, 
This my another question --- can we set up dns order?
the answer seems incline to negative.
 
> > "BOX1 is behind firewall"> > If at all possible, remove as many points of failure between you and the > client. If the DNS server could have a static (or rarely changing) > database so that it could run off a CD-ROM then dedicate a machine to it > and remove the firewall device (run a software firewall on the host if > desired). This still doesn't deal with the fundamental issue.> > "DNS round-robin"> I have googled the DNS round-robin, it is a load balance thing.
 
> > Clustering could solve some of the problem (if everything in the path is 
 
This "Clustering" can solve the problem IF this clustering is goegraphic saperated. I would like to any example in the real world.
 
Another sulation may be work as  Wayne Walker wwalker at bybent.com  suggested:
 
"C. Set up a proxy server on the host at 4.5.6.7 and have it forward alltraffic to 1.2.3.4 until it sees 1.2.3.4 is down, then it points alltraffic to another web server (or itself)."
I like to hear more about it, setting up, exapmles....
 
 
 
The above are just my guess. I may be wrong.
Thanks for all your inputs.
 
 
> > This is a question I've been pondering off an on for some time and, if > there is an answer, I'd really like to know.> > _______________________________________________> http://www.ntlug.org/mailman/listinfo/discuss
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