Webdialer and NAT

Unanswered Question
Sep 28th, 2009


We have a voice network that is completely separate of the data network (due to some security restrictions). Both networks are connected to the internet. We have a CUCM v6.1.3a.

I wonder if it is possible to use Webdialer/Click2Call widget on desktops in the data network. The voice network has a firewall that can do Network Address Translation.

Is Webdialer through NAT possible, and if so, which port(s) do we have to open?



I have this problem too.
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gogasca Mon, 09/28/2009 - 23:25

why you need to do NAT between data and voice?

I will use VPN

NAT may have some issues with CTI

Tim Lambrecht Wed, 10/14/2009 - 04:12

The telephony network is completely separated from the office (data) network due to historical reasons. The telephony network has a low-cost firewall that allows NAT/PAT, and that is the only way we can have webdialer requests coming in from PCs in the office network. VPN is not possible between the two networks.

Anyhow, I expected some issues with NAT so it was worth a try.


kelvin.blair Wed, 10/14/2009 - 05:41

NAT will definitely cause issues with this setup. If security is an issue, then why not use CTL files to encrypt phone traffic and use IPSEC to the gateway. Just a thought to get around your issue so that you can get the features you are looking for...


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