Hola,
Buen día, actualmente tengo issabel con modulo geoip activado permitiendo solo mi pais, pero por lo que veo durante la madrugada lograron enviar paquetes a mi pbx desde Netherlands:
[2018-02-15 23:13:38] SECURITY[15902] res_security_log.c: SecurityEvent="ChallengeSent",EventTV="1518754418-835564",Severity="Informational",Service="SIP",EventVersion="1",AccountID="sip:100@IP;tag=f309a2bec5f6448e8b65a1d3927776da",SessionID="0x7f1e14740148",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54684",Challenge="0622c912"
[2018-02-15 23:13:39] SECURITY[15902] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="1518754419-49802",Severity="Error",Service="SIP",EventVersion="2",AccountID="48222129427",SessionID="0x7f1e14740148",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54684",Challenge="0622c912",ReceivedChallenge="0622c912",ReceivedHash="609df6d53e0a788479397583932bd847"
[2018-02-15 23:13:39] SECURITY[15902] res_security_log.c: SecurityEvent="ChallengeSent",EventTV="1518754419-487302",Severity="Informational",Service="SIP",EventVersion="1",AccountID="sip:100@IP;tag=4b7511d1566c49029453bc0952d9954d",SessionID="0x7f1e14db2178",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54712",Challenge="2886eb7c"
[2018-02-15 23:13:39] SECURITY[15902] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="1518754419-713493",Severity="Error",Service="SIP",EventVersion="2",AccountID="0048222129427",SessionID="0x7f1e14db2178",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54712",Challenge="2886eb7c",ReceivedChallenge="2886eb7c",ReceivedHash="8e0fc9b226a372e57a319a2cff9356ed"
[2018-02-15 23:13:40] SECURITY[15902] res_security_log.c: SecurityEvent="ChallengeSent",EventTV="1518754420-201307",Severity="Informational",Service="SIP",EventVersion="1",AccountID="sip:100@IP;tag=0eff2e8aa928422890895b72b6cb5bdc",SessionID="0x7f1e1424ec08",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54741",Challenge="194d3783"
[2018-02-15 23:13:40] SECURITY[15902] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="1518754420-418219",Severity="Error",Service="SIP",EventVersion="2",AccountID="90048222129427",SessionID="0x7f1e1424ec08",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54741",Challenge="194d3783",ReceivedChallenge="194d3783",ReceivedHash="55973005a35020f7e83aac662577e073"
[2018-02-15 23:13:41] SECURITY[15902] res_security_log.c: SecurityEvent="ChallengeSent",EventTV="1518754421-52822",Severity="Informational",Service="SIP",EventVersion="1",AccountID="sip:100@IP;tag=3ca6474b4ac94a9fa9f92853d0090a19",SessionID="0x7f1e141e9fc8",LocalAddress="IPV4/UDP/IP/5060",RemoteAddress="IPV4/UDP/190.2.133.132/54769",Challenge="571a269d"