BIND9, nsupdate and damn DDNS - linux

Question

I've scoured through so many HOWTO pages on DDNS to try and fix this... I'm at a loss.
WorkstationX = CentOS 6.2 x64
ServerX = Ubuntu 12.04 LTS x64
I don't understand why it's not working... I'm literally out of ideas. I have regenerated and reconfigured everything several times.
I've made sure:
Running NTPD on both hosts, I have verified NTP is working
TZ is correct for both nodes (Hardware is UTC)
I've followed these guides:
http://linux.yyz.us/nsupdate/
http://agiletesting.blogspot.com.au/2012/03/dynamic-dns-updates-with-nsupdate-and.html
http://www.cheshirekow.com/wordpress/?p=457
https://www.erianna.com/nsupdate-dynamic-dns-updates-with-bind9
http://consultancy.edvoncken.net/index.php/HOWTO_Manage_Dynamic_DNS_with_nsupdate
http://blog.philippklaus.de/2013/01/updating-dns-entries-with-nsupdate-or-alternative-implementations-your-own-ddns/
Some of them have varying ways of generating the key, but the rest is the same... and still, when I try nsupdate - even on the server where dnssec-keygen was run (and where bind is), I get the same log entries:
Aug 14 11:20:38 vps named[31247]: 14-Aug-2013 11:20:38.032 security: error: client 127.0.0.1#29403: view public: request has invalid signature: TSIG domain2.com.au.: tsig verify failure (BADKEY)
from this nsupdate:
nsupdate -k Kdomain2.com.au.+157+35454.key
server localhost
zone domain2.com.au.
update add test.domain2.com.au. 86400 IN A 10.20.30.40
show
send
What I gather is the CORRECT generated method:
dnssec-keygen -a HMAC-MD5 -b 512 -n HOST domain2.com.au.
named.conf (IPs have been changed for privacy):
acl ipv4 { 0.0.0.0/0; };
acl ipv6 { 2000::/3; ::1; fe80::/10; fec0::/10; };
acl safehosts { 127.0.0.0/8; 3.2.2.40; 44.44.14.12; };
include "/etc/bind/rndc.key";
controls {
inet * port 953
allow { safehosts; } keys { "rndc-key"; };
};
options
{
auth-nxdomain yes;
empty-zones-enable no;
zone-statistics yes;
dnssec-enable yes;
listen-on { any; };
listen-on-v6 { any; };
directory "/etc/bind/db";
managed-keys-directory "/etc/bind/keys";
memstatistics-file "/etc/bind/data/bind.memstats";
statistics-file "/etc/bind/data/bind.qstats";
};
logging
{
## CUT ##
};
view "public"
{
recursion yes;
allow-query-cache { safehosts; };
allow-recursion { safehosts; };
zone "." IN {
type hint;
file "root.zone";
};
zone "0.0.127.in-addr.arpa" {
type master;
allow-update { none; };
allow-transfer { none; };
file "0.0.127.in-addr.arpa.zone";
};
zone "localhost" {
type master;
allow-update { none; };
allow-transfer { none; };
file "localhost.zone";
};
zone "3.2.2.in-addr.arpa" {
type master;
allow-update { none; };
allow-transfer { none; };
file "3.2.2.in-addr.arpa.zone";
};
zone "domain1.com.au" {
type master;
notify yes;
allow-update { key "rndc-key"; };
allow-transfer { key "rndc-key"; };
file "domain1.com.au.zone";
};
zone "domain2.com.au" {
type master;
notify yes;
allow-update { key "rndc-key"; };
allow-transfer { key "rndc-key"; };
file "doomain2.com.au.zone";
};
};
/etc/bind/rndc.key:
key "rndc-key" {
algorithm hmac-md5;
secret "vZwCYBx4OAOsBrbdlooUfBaQx+kwEi2eLDXdr+JMs4ykrwXKQTtDSg/jp7eHnw39IehVLMtuVECTqfOwhXBm0A==";
};
Kdomain1.com.au.+157+35454.private
Private-key-format: v1.3
Algorithm: 157 (HMAC_MD5)
Key: vZwCYBx4OAOsBrbdlooUfBaQx+kwEi2eLDXdr+JMs4ykrwXKQTtDSg/jp7eHnw39IehVLMtuVECTqfOwhXBm0A==
Bits: AAA=
Created: 20130814144733
Publish: 20130814144733
Activate: 20130814144733

Answer 1

SOLUTION:
I have no idea why, but it is now working. The only things I did is the following:
# chown -R named:named /var/named
# find . -type d -exec chmod 770 {} \;
# find . -type f -exec chmod 660 {} \;