Anyone have any experience of this product?

Some of our suppliers are trying to insist that we allow them to use Webex to provide support for their applications.

We don't like the idea of this software allowing the suppliers access to our network through our firewalls. The program uses standard internet protocols and ports. The suppliers are telling us that the link has to be initiated from our end and we can watch what they do. The product information from Webex themselves is aimed at the support provider rather than the supported customer and boasts of going through most firewalls seamlessly (we don't like that bit) and that THEY can initiate the link into our network (we really don't like that).

Webex themselves act as an intermediary between us and the support providers (we don't like that much either).

Are we being overly suspicious of the webex products or does it have security issues we should be concerned with?

TIA.