[CentOS] Forcing IPv4 DNS lookups first before IPv6

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.

-- 

rgds
Stephen