[asterisk-users] Forward loop protection...

[SamyGo]

Could this possibly mean that any person who has CF set should never be
available as CF Destination. Simple db entry/check can have this done.

On Tue, Jun 2, 2015 at 5:34 PM, <dk at donkelly.biz> wrote:

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> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Kevin Larsen
> *Sent:* Tuesday, June 2, 2015 4:09 PM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Subject:* Re: [asterisk-users] Forward loop protection...
>
>
>
> >      Ia had a server overload today because someone did a call forward
> > to their own extension.  To do a call forward I write a key called CFWD
> > with the extensión number and number to dial .  The main script tests if
> > the key/value exists and dials the number stored in the database.  What
> > is an easy way to prevent dumb people from creating a loop?
>
> Right after you have read the number to call forward to, compare it to the
> number you are call forwarding from. If it matches, play the user an error
> message and have them try again.
>
> And no matter what you do, the dumb people will come up with more creative
> ways to tank your phone system. A large amount of my dialplan code is
> taking into account the stupid things they have done and handling it
> properly if they do it again. I swear, if you could harness their
> creativity for good you could solve the world's problems 10 times over.
>
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> The loop checking is a bit more challenging than that. If Bob forwards to
> Fred and Fred forwards to Sue, all is well when Bob and Fred head out for a
> beer. A little later, we’re in deep doo-do0 when Sue forwards to Bob.
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>
>   --Don
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>
>
> --
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