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<body class='hmmessage'><div dir='ltr'>hi kevin,<BR> <BR>Stealth slaves can't be used as backup NS server. This backup server can't be accessed by all internet users.<BR>It can only be accessed by users from one ISP. It's used when all authority NSs are down, especially in case of DDoS attack. <BR> <BR>Guanghua Hou<BR> <BR><br>> <br>> Message: 4<br>> Date: Mon, 28 Apr 2014 12:08:29 -0400<br>> From: Kevin Darcy <kcd@chrysler.com><br>> To: bind-users@lists.isc.org<br>> Subject: Re: How to setup a backup NameServer?<br>> Message-ID: <535E7CFD.2010409@chrysler.com><br>> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br>> <br>> I'm not sure this makes sense from an architectural standpoint. If all <br>> of the authoritative NSes are down, where is this "backup nameserver" <br>> getting its data from, and how current is that data?<br>> <br>> If slightly *stale* data is acceptable, in the absence of all <br>> authoritative NSes, then why not just set up your "regular" <br>> nameserver(s) as stealth slaves of the zone(s)? Why dedicate a special <br>> "backup nameserver" for this function? What value does that add?<br>> <br>> - Kevin<br>> On 4/27/2014 11:30 PM, houguanghua wrote:<br>> > Dear all,<br>> ><br>> > Does bind support backup nameserver? This nameserver isn't <br>> > regeristered and not accessed in normal situation. Only when all <br>> > authority NSs is down, this backup nameserver will be accessed by <br>> > Local DNS server.<br>> > How to configure this backup NS and how to configure in the local DNS <br>> > server?<br>> ><br>> > Thanks,<br>> > Guanghua Hou<br>> ><br>> ><br>> > _______________________________________________<br>> > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list<br>> ><br>> > bind-users mailing list<br>> > bind-users@lists.isc.org<br>> > https://lists.isc.org/mailman/listinfo/bind-users<br>> <BR> </div></body>
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