[strongSwan] L2TP help

[Troy Telford]

On Wednesday, September 22, 2010 01:04:54 pm Andreas Steffen wrote:
> Hello Troy,
> 
> > #4: NAT-Traversal: Transport mode disabled due to security concerns
> 
> means that the option
> 
>  ./configure --enable-nat-transport
> 
> is not active.
> 
> Regards
> 
> Andreas

Since I'm using the debian package, I looked at the debian source pkg, and 
found the following:

# Could enable --enable-nat-transport, but this is actually insecure,
# so don't!

Is there any truth to this statement, and transport mode is a bad idea, or is 
it outdated and something I should ask the debian package maintainer to 
update?