Merhaba,
gugıla sordunuz mu?
mesela 
http://fixunix.com/dns/334302-re-too-many-timeouts-resolving-disabling-edns-messages.html
Eğer dsl modem kullanıyorsanız, köprü moduna alabilirsiniz. Memlekette 
UDP konusunda NAT yada port yönlendirmesini adam gibi yapamayan modem fazla.

saygılar

Mümin Ölmez yazmış:
> Merhabalar,
>
> BIND named(8) üzerinde bazı adreslerin çözümü uzun zaman sürüyor. 
> Örneğin "newsrss.bbc.net.uk" adresini çözümlemesi uzun süre alıyor, 
> bazen de çözemiyor.
> Bu konuda fikri olan var mı acaba?
>
> # nslookup
> > newsrss.bbc.net.uk
> ;; Got SERVFAIL reply from 10.1.0.5, trying next server
> ;; Got SERVFAIL reply from 10.1.0.10, trying next server
> ;; connection timed out; no servers could be reached
> >
> şeklinde hata veriyor.
>
> /var/log/messages dosyasındaki loglarda ise aşağıdaki bilgiler yer 
> alıyor;
>
> Mar 12 13:47:06 ns1 named[27732]: too many timeouts resolving 
> 'newsrss.bbc.net.uk/A' (in 'bbc.net.uk'?): disabling EDNS
> Mar 12 13:47:06 ns1 named[27732]: too many timeouts resolving 
> 'newsrss.bbc.net.uk/A' (in 'bbc.net.uk'?): disabling EDNS
> Mar 12 13:47:09 ns1 named[27732]: too many timeouts resolving 
> 'www.natvet.su.se/A' (in 'se'?): disabling EDNS
> Mar 12 13:47:09 ns1 named[27732]: client 193.140.248.41#32940: RFC 
> 1918 response from Internet for 11.0.1.10.in-addr.arpa
> Mar 12 13:47:09 ns1 named[27732]: too many timeouts resolving 
> 'ns-sec.ripe.net/A' (in 'ripe.net'?): disabling EDNS
> Mar 12 13:47:09 ns1 named[27732]: too many timeouts resolving 
> 'ns-sec.ripe.net/AAAA' (in 'ripe.net'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'SUNIC.SUNET.SE/A' (in 'se'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '202.160.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'SUNIC.SUNET.SE/AAAA' (in 'se'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '203.160.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '203.160.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '174.166.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '174.166.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'www.science.su.se/A' (in 'se'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '29.96.101.212.in-addr.arpa/PTR' (in '212.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '31.96.101.212.in-addr.arpa/PTR' (in '212.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'NS-EXT.ISC.ORG/A' (in 'ISC.org'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'NS-EXT.ISC.ORG/AAAA' (in 'ISC.org'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> '26.72.79.77.in-addr.arpa/PTR' (in '77.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:10 ns1 named[27732]: too many timeouts resolving 
> 'ns2.dns.br/A' (in 'br'?): disabling EDNS
> Mar 12 13:47:11 ns1 named[27732]:last message repeated 2 times
> Mar 12 13:47:11 ns1 named[27732]: too many timeouts resolving 
> 'NS-EXT.ISC.ORG/A' (in 'ISC.org'?): disabling EDNS
> Mar 12 13:47:11 ns1 named[27732]: too many timeouts resolving 
> 'NS-EXT.ISC.ORG/AAAA' (in 'ISC.org'?): disabling EDNS
> Mar 12 13:47:11 ns1 named[27732]: too many timeouts resolving 
> '29.96.101.212.in-addr.arpa/PTR' (in '212.in-addr.arpa'?): disabling EDNS
> Mar 12 13:47:11 ns1 named[27732]: too many timeouts resolving 
> 'ns2.dns.br/AAAA' (in 'br'?): disabling EDNS
> Mar 12 13:47:12 ns1 named[27732]:last message repeated 2 times
> Mar 12 13:47:12 ns1 named[27732]: too many timeouts resolving 
> '202.160.191.91.in-addr.arpa/PTR' (in '91.in-addr.arpa'?): disabling EDNS
>
> -- 
> İzmir Yüksek Teknoloji Enstitüsü
> Bilgi İşlem Daire Başkanlığı
> Ağ ve Sistem Yönetim Grubu
> Mümin ÖLMEZ
> Tel: +90-(232)-750 7664
> Email: [email protected]
> http://www.iyte.edu.tr
>
>
>
> ------------------------------------------------------------------------
>
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