* local DNS server is not working for external hostnames (caused by dnssec enabled in named.conf). Workaround

echo -e 'DNSSEC="off"\nDLV="off"' > /etc/sysconfig/dnssec

* VPN does not work (had to turn it off in servers). This could be due to the kernel not having all that it needs for TUN/TAP?:

* Cannot allocate TUN/TAP dev dynamically