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Old 06-09-2010, 10:12 AM   #1
rogerdv
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Registered: Jul 2005
Location: Cuba
Distribution: redhat
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dns failures


Since yesterday, I have found a weird problem with my DNS. suddnely, I started getting lots of errors like this:

Code:
Jun  9 09:59:19 prospero named[2924]: network unreachable resolving 'ns-944.amazon.com/A/IN': 2001:503:a83e::2:30#53
Jun  9 09:59:19 prospero named[2924]: network unreachable resolving 'ns-944.amazon.com/AAAA/IN': 2001:503:a83e::2:30#53
Jun  9 09:59:20 prospero named[2924]: network unreachable resolving '37.114.195.67.in-addr.arpa/PTR/IN': 2001:5a0:10::2#53
Jun  9 09:59:20 prospero named[2924]: network unreachable resolving '37.114.195.67.in-addr.arpa/PTR/IN': 2001:500:14:6050:ad::1#53
Jun  9 09:59:26 prospero named[2924]: network unreachable resolving 'dns11.cotdns.net/A/IN': 2001:503:231d::2:30#53
Jun  9 09:59:26 prospero named[2924]: network unreachable resolving 'dns11.cotdns.net/AAAA/IN': 2001:503:231d::2:30#53
Jun  9 09:59:26 prospero named[2924]: network unreachable resolving 'dns12.cotdns.net/A/IN': 2001:503:231d::2:30#53
This server is both authoritative for my zone and serves as cache for my internal network name resolution. The problem is just with external doains, everybody seems to be resolving my zone names correctly.
This is my named.conf:

Code:
options {
	directory "/var/named/data";
#	fetch-glue no;
	allow-transfer{
		200.55.150.178;
		127.0.0/8;
		192.168.1.4;
	};

	transfer-format many-answers;
	#recursion no;
	pid-file "/var/run/named/named.pid";
};
zone "." {
	type hint;
	file "db.cache";
};
zone "ehtsc.co.cu"{
	type master;
	file "db.eht";
};

zone "granhotelstgo.cu"{
	type master;
	file "db.granhotelstgocu";
};
zone "0.0.127.in-addr.arpa"{
	type master;
	file "db.127.0.0";
};
### zone "176/29.150.55.200.in-addr.arpa"{
zone "176/29.150.55.200.in-addr.arpa"{

	type master;
	allow-query {
	 any;
	};
	allow-update {
	 192.168.1/24;
	};
	file "db.200.55.150";
};
 
Old 06-09-2010, 12:50 PM   #2
bathory
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Registered: Jun 2004
Location: Piraeus
Distribution: Slackware
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Hi,

Why are you using IPv6 addresses?
Add "OPTIONS="-4"" to /etc/sysconfig/named so named will use only IPv4 addresses and restart the service

Regards
 
Old 06-09-2010, 01:31 PM   #3
rogerdv
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Well, i dont know why that IPv6 got in the way, we are far from using it yet.
 
Old 06-09-2010, 01:45 PM   #4
bathory
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Some of the root servers use both IPv4 and IPv6 addresses. So bind tries first the IPv6 if you don't use the "-4" option.
You can use:
Code:
NETWORKING_IPV6=no
in /etc/sysconfig/network to completely disable IPv6
 
  


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