sip ports

  1. Changing The SIP port after installing the PBX

    Could someone please explain what is the SIP port used for (Please explain as you are explaining for a noob) ?? Is it any possible to change the SIP port after installing 3CX ? I spent hours configuring 3CX , also it takes time to actually install 3cx ....
  2. Fred2k

    Is it necessary to block all SIP traffic other than from provider?

    I'm currently setting up a test 3CX system, and was reading this article about setting up the firewall. From the below image it looks like your're supposed to lock down SIP and media traffic so that it only comes from your SIP provider: We use Gradwell as our SIP trunk provider, and I asked...
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