[lxc-users] Container Network no IP's, Unreachable - HELP

[TuxRaiderPen]

On Sunday, May 18, 2014 01:40:55 C. R. Oldham wrote:

> Doesn't this mean that there are no forwarding/NAT rules in place for your
> virtual container network?  Did you recently change any network or routing
> parameters on the LXC host?

I have a rule DON'T TOUCH iptables !

I don't know anything about the magic that makes this bridge work for LXC.

I've changed nothing... 

From what I've found see, other post, it appears that an UPDATE for software 
on the HOST changes isc-dhcp or dhcp-isc and this breaks networking on 12.04 
containers.

So adding...
sudo iptables -t mangle -A POSTROUTING -o lxcbr0 -p udp -m udp --dport 68 -j 
CHECKSUM --checksum-fill

Fixes it... but I am not sure that resolves it permanently,.