Чёрный список «плохих» SIP User Agent (сканеров), которые 3CX блокирует по-умолчанию:
friendly-scanner,sipsak,smap,Elite 1.0 Brcm Callctrl,sipcli,VaxSIPUserAgent,VaxIPUserAgent,PortSIP,friendly-request,sip-scan,sipvicious,sundayddr,iWar,SIVuS,Gulp,sipv,siparmyknife,Test Agent,eyeBeam release 3006o stamp 17551,SIP Call,PortSIP VoIP,Conaito,Ozeki,Gbomba,MizuPhone,VoIP v11.2.4,VoIP SIP v11.0.0,VoIP v11.1.2,sdfsfsdfsdfdf,Nmap NSE,BaSeL-X,dr.pes,Z 3.14.38765 rv2.8.3,pplsip,sipptk,eyeBeam release 3004t stamp 16741,eyeBeam release 3007n stamp 17816,eyeBeam release 3010n stamp 19039,MGKsip,Z 10.14.38765 rv2.8.3,A_B_C,UsaAirport,KPhone/3.14,zxcvfdf11,eXosip,eyeBeam release 3015c stamp 27107,SipClinte2019,yarab100,eXosip2,SipReg v1.0,IPOffice