DNS: host unreachable resolving

[Christian Aguilar Varga]

Hello,
I'm running bind 9.3.2.4 over HP-UX B.11.23. I got the next errors under named.log file:

25-May-2010 13:54:46.448 lame-servers: info: lame server resolving 'dnsnatl0.datl.voicestream.us.gprs' (in 'VOICESTREAM.US.gprs'?): 216.155.160.111#53
25-May-2010 13:54:46.882 lame-servers: info: lame server resolving 'dnsnatl0.datl.voicestream.us.gprs' (in 'VOICESTREAM.US.gprs'?): 216.155.160.111#53
25-May-2010 13:55:24.915 lame-servers: info: lame server resolving 'gprsnsext1.proximus.be.gprs' (in 'proximus.be.gprs'?): 213.181.60.1#53
25-May-2010 13:55:24.915 lame-servers: info: lame server resolving 'gprsnsext2.proximus.be.gprs' (in 'proximus.be.gprs'?): 213.181.60.1#53
25-May-2010 13:55:25.367 lame-servers: info: lame server resolving 'gprsnsext1.proximus.be.gprs' (in 'proximus.be.gprs'?): 213.181.60.2#53
25-May-2010 13:55:25.368 lame-servers: info: lame server resolving 'gprsnsext2.proximus.be.gprs' (in 'proximus.be.gprs'?): 213.181.60.2#53
25-May-2010 14:05:47.491 lame-servers: info: host unreachable resolving '31.4.19.172.in-addr.arpa/PTR/IN': 2001:500:3::42#53
25-May-2010 14:05:48.773 lame-servers: info: host unreachable resolving 'U.ARIN.NET/A/IN': 2001:500:31::108#53
25-May-2010 14:05:49.220 lame-servers: info: host unreachable resolving '31.4.19.172.in-addr.arpa/PTR/IN': 2001:500:14:6050:ad::1#53
25-May-2010 14:05:50.441 lame-servers: info: host unreachable resolving 'W.ARIN.NET/A/IN': 2001:503:a83e::2:30#53
25-May-2010 14:05:50.441 lame-servers: info: host unreachable resolving 'W.ARIN.NET/AAAA/IN': 2001:503:a83e::2:30#53
25-May-2010 14:05:50.442 lame-servers: info: host unreachable resolving 'X.ARIN.NET/A/IN': 2001:503:a83e::2:30#53

In according with your experience, Could you give me any clue about why i got "host unreachable" for IPv6?

Regards,

CHristian Aguilar

[VK2COT · Accepted solution]

Hello Christian,

a) Lame server warning means that name servers that are specified as authoritative in this domain's zone actually are not authoritative. If it is your domain, then check name servers.

b) Or, remote name servers that are supposed to be authoritative for these domains are not.

When your server tries to resolve host names
in those domains, the DNS servers do not respond as expected, and you get the "lame server" message in your log.

c) About "host unreachable" issue,
take a look at nice explanations like:

http://www.ietf.org/rfc/rfc4074.txt

d) Overall, Nothing to worry about, more
an annoyance than anything else.

You can disable the logging of lame
server messages in /etc/named.conf;

logging {
category lame-servers{ null; };
};

Cheers,

VK2COT