Carter N. <[EMAIL PROTECTED]> wrote: > I use QDNS with our campus's DNS server. > > I run QDNS from time to time (for the last year or so) but I'm > finding that there are some persistently unresolvable addresses. I'm > confident that our campus DNS server is well-maintained. Presumably, > either the DNS server is not getting these addresses' names for some > reason, or they are not registered properly with the authorities in > the first place.
There are lots of IP addresses in use that do not have any name registered in DNS. Typical figures are around 25-30% or addresses are unresolvable. It's nothing to do with your local DNS server, or the tool you use for doing DNS lookups. If a number hasn't been assigned a name, then you can't resolve it. > Are there any techniques I can use (e.g. an off-campus publically > accessible DNS) to resolve these stubborn addresses? The only DNS server that can resolve xyz.foo.com is the DNS server for the foo.com domain. And you've already found out that it doesn't have anything to say about the addresses involved (in.addr.arpa lookups are slightly different, but the point still holds true - if it's not registered by the "owing" DNS servers, you can't resolve it with any tools). > I am hoping I > don't have to go to arin or ripe to manually enter all those > addresses! It won't help much, but it will tell you what organization owns the block of addresses involved. As it happens, one of the Helper applications (http://www.analog.cx/helpers/) already does this. Jdresolve will create a "fake" name for unresolvable addresses, based on who the block of addresses is registered to. It is written in perl, but the last time I looked at it, about 2 years ago, I couldn't get it to run on NT, because of the dependencies. I don't know what the current state of play is. Aengus +------------------------------------------------------------------------ | This is the analog-help mailing list. To unsubscribe from this | mailing list, go to | http://lists.isite.net/listgate/analog-help/unsubscribe.html | | List archives are available at | http://www.mail-archive.com/[email protected]/ | http://lists.isite.net/listgate/analog-help/archives/ | http://www.tallylist.com/archives/index.cfm/mlist.7 +------------------------------------------------------------------------
