Third Party SIP Client and ASA Phone Proxy

Unanswered Question
Apr 30th, 2010

Can a third party sip client (eg. xlite) on the Internet securely register to UCM (using digest authentication) via the ASA Phone Proxy feature?

I have this problem too.
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Jonathan Schulenberg Fri, 04/30/2010 - 20:54

Highly unlikely. The ASA Phone Proxy utilizes a certificates-based TLS tunnel between the phone and the ASA. To my knowledge, there are no third-party phones that support the mixed-mode encryption that Cisco has designed for this feature. I would suggest a IPsec or SSL-based VPN connection which would abstract this from the soft phone.

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