Found in my log this evening...

Mar  3 19:39:39 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '94637683556325' rejected because
extension not found in context 'default'.
Mar  3 19:39:40 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '0442032989450' rejected because
extension not found in context 'default'.
Mar  3 19:39:43 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '00442032989450' rejected because
extension not found in context 'default'.
Mar  3 19:39:46 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '000442032989432' rejected because
extension not found in context 'default'.
Mar  3 19:39:49 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '0001442032989434' rejected because
extension not found in context 'default'.
Mar  3 19:39:52 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '001442032989432' rejected because
extension not found in context 'default'.
Mar  3 19:39:55 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '9442032989438' rejected because
extension not found in context 'default'.
Mar  3 19:39:58 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '900442032989438' rejected because
extension not found in context 'default'.
Mar  3 19:40:01 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '9011442032989450' rejected because
extension not found in context 'default'.
Mar  3 19:40:04 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '90442032989438' rejected because
extension not found in context 'default'.
Mar  3 19:40:07 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '011442032989438' rejected because
extension not found in context 'default'.
Mar  3 19:40:10 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+00442032989452' rejected because
extension not found in context 'default'.
Mar  3 19:40:13 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+011442032989450' rejected because
extension not found in context 'default'.
Mar  3 19:40:16 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+0442032989431' rejected because
extension not found in context 'default'.
Mar  3 19:40:19 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+900442032989453' rejected because
extension not found in context 'default'.
Mar  3 19:40:22 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+9011442032989436' rejected because
extension not found in context 'default'.
Mar  3 19:40:25 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '+442032989438' rejected because
extension not found in context 'default'.
Mar  3 19:40:28 pbx local0.notice asterisk[3257]: NOTICE[3324]:
chan_sip.c:22461 in handle_request_invite: Call from ''
(95.130.23.40:5060) to extension '442032989436' rejected because
extension not found in context 'default'.


Someone is fishing for an asterisk server that will route international
calls.  Make sure you are buttoned up tight.  Should the adaptive-ban
firewall plugin have detected this?  Doesn't appear to have... maybe
because the firewall let it through and it is asterisk that rejected the
request?

David
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Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
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