There is little point in doing so - a SIP client can choose to send anything it likes in that header. It would be trivial to bypass such a restriction. -Steve On 20 June 2013 11:16, 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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