Asterisk PBX SIP Service Guest Access Enabled

Asterisk PBX SIP service guest access is enabled. Description : Asterisk an open-source PBX is installed on the remote system. The SIP service is accepting SIP peers to use the proxy server as guest users. Unauthenticated users can use the proxy without supplying the required 'more secure' authentication. Guest access is enabled by default if 'allowguest=no' is not set in 'sip.conf'. Guest peers use the context defined under the general section and the restrictions set in the Asterisk config files.
If guest access is not needed, disable it by setting 'allowguest=no' in the sip.conf file.