You can probably do this with the "user-agent-filter" parameter that has some notes / descriptions here: http://jira.freeswitch.org/browse/FS-2720

But, I'd have to concur with Steven -- changing the user agent presented by a client is generally pretty simple and this would only be useful as a first, basic line of defense.

-Gabe

On Thu, Jun 20, 2013 at 6:16 AM, Vincent Xia <gmangudai@gmail.com> wrote:

normally a SIP REGISTER request will contain information about the terminal like:

User-Agent: X-LITE 3.0

so is it possible to have FS reject all softphone registering requests except, for example, X-LITE,

without changing FS source code?

BR

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