Sure looks like it
Why I don't use SIP at all except on the LAN
I have two ( non AstLinux ) telephone customers with systems that have SIP gateways for remote phones, and we had to change to non standard ports to keep out the sipvicious scripts. One was so bad that the provider had to change the customers IP address because the damn script was so stupid it kept banging away even when there was never a response Others have blocked whole ranges of IP addresses, especially from China, Russia and Romania because of the attempts.
You may or may not have that option.

for PSTN VOIP access I select providers that support IAX. Perhaps not a forever solution, but SIP is just to widespread and an easy target

Strong passwords and non numeric extensions also help
I don't believe you have the option, but fail2ban also is another tool

For remote AstLinux boxes I support, I have had to change the SSH port as well because of these attempts


John Novack


David Kerr wrote:
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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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  
<http://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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Cloud computing makes use of virtualization - but cloud computing
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------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
_______________________________________________
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