Root and Forwarders Servers

[fzanotti at my-deja.com]

Mark,
I am having the same problem as discused below, how can I edit the code
to fix this issue. The version of BIND I have installed is 8.2.2P5 on a
Redhat Linux 6.2 box.

In article <200005300722.RAA13342 at bsdi.dv.isc.org>,
  Mark.Andrews at nominum.com wrote:
>
> 	The following bug is biting you.  From the 8.2.3 change list.
>
>  910.   [bug]           address-sorting logic was exiting early.
>
> 	In src/bin/named/ns_forw.c: nslookup change
>
>         if (n > 1) {
>                 qsort((char *)qp->q_addr, n, sizeof(struct qserv),
>                       (int (*)(const void *, const void *))qcomp);
>         }
>
> 	to
>
>         /* Just sort the NS RR's we added, since the forwarders may
>          * be ahead of us (naddr > 0)
>          */
>         if (n > naddr) {
>                 qsort((char *)(qp->q_addr+naddr), n-naddr, sizeof
(struct qserv),
>                       (int (*)(const void *, const void *))qcomp);
>         }
>
> 	This will work around the problem in qcomp.
>
> 	Mark
>
> >
> > Hi there,
> >
> >  I've just installed new version of BIND (Version = named 8.2.2-P5)
> > instead of good old 4.9.7 at one of my servers and now doing some
testing.
> > So, I'd be thankfull if anybody could clarify some nuances of
> > "forwarders" option:
> >
> > 0) I set "forwarders first" and "forwarders server" option and have
> >    default root.cache file.
> >
> > 1) When answering a query, named first tries all(?) root servers,
> >    and only after this tries my "forwarders server" 193.193.193.100.
> >    This significantly slows dns responces.
> >
> >    The problem is that I expect named to query "forwarders server"
> >    first, not one of the root servers, because my forwarder answers
much
> >    faster than root does.  Nevertheless, I dont want to use
> >    "forwarders only " option, cause this will disable use of root
servers
> >    even if my "forwarder" is unavailable.
> >
> >
> > Some debug 1 output from named.run (with no connection to root
servers):
> >
> > datagram from [client.ip].1266, fd 20, len 31
> > req: nlookup(www.digex.net) id 1475 type=1 class=1
> > req: found 'www.digex.net' as 'net' (cname=0)
> > forw: forw -> [205.188.185.18].53 ds=4 nsid=61164 id=1475 16ms
retry 4sec
> > resend(addr=1 n=0) -> [195.8.99.11].53 ds=4 nsid=61164 id=1475 64ms
> > resend(addr=2 n=0) -> [198.41.0.21].53 ds=4 nsid=61164 id=1475 93ms
> > resend(addr=3 n=0) -> [198.41.3.38].53 ds=4 nsid=61164 id=1475 99ms
> > resend(addr=4 n=0) -> [198.17.208.67].53 ds=4 nsid=61164 id=1475
118ms
> > resend(addr=5 n=0) -> [192.5.5.241].53 ds=4 nsid=61164 id=1475 118ms
> > resend(addr=6 n=0) -> [210.176.152.18].53 ds=4 nsid=61164 id=1475
252ms
> > resend(addr=7 n=0) -> [198.41.0.4].53 ds=4 nsid=61164 id=1475 451ms
> > resend(addr=8 n=0) -> [216.33.75.82].53 ds=4 nsid=61164 id=1475
971ms
> > resend(addr=9 n=0) -> [192.112.36.4].53 ds=4 nsid=61164 id=1475
1006ms
> > resend(addr=10 n=0) -> [192.36.144.253].53 ds=4 nsid=61164 id=1475
1419ms
> > reforw(addr=11 n=0) -> [193.193.193.100].53 ds=4 nsid=61164
id=1475 -1ms
> > 			^^^^^^^^^^^^^^^^^
> >
> > resend(addr=12 n=0) -> [192.203.230.10].53 ds=4 nsid=61164 id=1475
2697ms
> > resend(addr=0 n=1) -> [205.188.185.18].53 ds=4 nsid=61164 id=1475
16ms
> > resend(addr=1 n=1) -> [195.8.99.11].53 ds=4 nsid=61164 id=1475 64ms
> > datagram from [193.193.193.100].53, fd 4, len 123
> > 		^^^^^^^^^^^^^^^^
> > send_msg -> [client.ip].1266 (UDP 20) id=1475
> >
> >
> > BR,
> >
> > Bernt
> >
> >
> >
> >
> >
> --
> Mark Andrews, Nominum Inc.
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET:
Mark.Andrews at nominum.com
>
>


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