[Asterisk-Users] What would be required for this?

[Jon Miron]

 --- Greg Hill <gregh-asterisk at hillnet.us> wrote: 
> This is relatively straightforward to implement in a
> dialplan
> (extensions.conf) either by implementing extensions
> direction or by using
> the DISA application. Keep in mind that a system
> which allows an incoming
> call to make an outgoing call has some inherent
> security issues
> ('wardialing' hasn't gone away).

Is there any way to add some kind of secuity to this? 
Either by needing an access code to get into some kind
of sub-menu, only allow it from certain numbers (eg my
cell number), or some other way?