[CentOS] Forcing IPv4 DNS lookups first before IPv6

Thank you, but unfortunately this is a different issue. These boxes do 
not run bind, they resolve their DNS queries via dedicated bind servers 
on the network. Configuring the bind servers on the network a different 
way still would not stop the IPv6 traffic I am showing in the TCP dump 
from being sent.



On 4/4/2011 11:54 AM, Stephen Harris wrote:
> On Mon, Apr 04, 2011 at 11:34:25AM -0500, Russell Jones wrote:
>> [root at hostname1 ~]# tcpdump -vvvvv 'port 53'
>> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96
>> bytes
>>
>> 11:07:24.989304 IP (tos 0x0, ttl  64, id 65039, offset 0, flags [DF],
>> proto: UDP (17), length: 60) hostname1.59725>
>> vdns1-hc.example.com.domain: [bad udp cksum 2bd2!]  26130+ AAAA?
>> hostname2.example.com. (32)
>
> Check https://bugzilla.redhat.com/show_bug.cgi?id=140528 and see if
> that resolves your issue.
>