Dundi How-To

[jmullinix]

A few months ago, I wrote a Dundi How-to and posted it on my website. This weekend I found a flaw in that original document that, if implemented, could allow a remote user to dial any phone number through your machine as a Dundi Peer. I have made corrections in the document to prevent this and have the new document posted on my website.

If you used my original document, please download and revamp your server to match the context I presented in this one. You will feel better about your phone bill.

http://cohutta.com/Dundi_How_to.pdf

 

[jroper]

Hi

Wish I'd found your document when I was setting up Dundi for a customer the other week.

Meanwhile in your document: -

Next create the switch. I am not really sure what this does, but probably calls Dundi stuff in Asterisk.

The switch statement allows you access to the remote box. From the original iax.conf:-

; You can use an alternative switch type as well, to resolve
; extensions that are not known here, for example with remote
; IAX switching you transparently get access to the remote
; Asterisk PBX
;
; switch => IAX2/userassword@bigserver/local

I think the /local part means that you can call anything in the "local" context.

You may also consider the trunk=yes in your iax entry.

This provides for efficiency savings on bandwidth. e.g. 5 separate IAX calls from one box to another will go as 5 separate data streams, each with their own packet overhead.

The trunk statement would combine all calls into one data stream, and therefore one packet overhead. Thus each subsequent call only uses extra bandwidth equal to the codec.

Thus on larger numbers of concurrent calls, it is as efficient as it can be, but does require a timing source.


Joe

 

[jmullinix]

Joe,

Thanks for the tips. I will implement them into the document in a day or two and notify everyone here when I have done it.

Thanks again,