This is the purpose of the fail2ban system that was already mentioned.<div><br></div><div>-Steve</div><div><br><div><br><br><div class="gmail_quote">On 13 May 2013 15:52, Telecube - John <span dir="ltr"><<a href="mailto:john@telecube.com.au" target="_blank">john@telecube.com.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
You can install a log watching program that looks out for specific
log entries and can take action. Eg; writing a firewall rule to ban
the ip address of the system trying to make unauthorised calls.<br>
<br>
'swatch' is a good tool for this in linux systems.<br>
<br>
<a href="http://sourceforge.net/projects/swatch/" target="_blank">http://sourceforge.net/projects/swatch/</a><span class="HOEnZb"><font color="#888888"><br>
<br>
John <br></font></span><div><div class="h5">
<br>
<div>On 14/05/13 12:35 AM, Ken Rice wrote:<br>
</div>
<blockquote type="cite">
<font face="Monaco, Courier New"><span style="font-size:11pt">Ok
look at the 3rd column... This is someone trying to figure out
how to get calls thru your public context with various prefix
codexs... Notices how all the calls end with 972598371070
<-- that’s the intl destination umber probably a phone in
gaza (definitely in Isreali controlled areas, but I think I
looked up this number or similar number in the past)<br>
<br>
To protect yourself, only allow calls to local extentsions
from the public context... <br>
<br>
<br>
On 5/13/13 2:49 AM, "Steven Ayre" <<a href="http://steveayre@gmail.com" target="_blank">steveayre@gmail.com</a>>
wrote:<br>
<br>
</span></font>
<blockquote><font face="Monaco, Courier New"><span style="font-size:11pt">The call duration is 0 seconds so no
they didn't get in. Any accepted call attempt will generate
a CDR even if it was not answered.<br>
<br>
They're coming in on the 'public' context which'll mean an
unauthenticated call on the external profile. That would be
the context allowing you to receive calls from strangers.
Providing that context doesn't allow them to dial out via
providers that charge you this isn't an issue.<br>
<br>
-Steve<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 13 May 2013 07:17, Bala Murugan Mahendran <<a href="http://b2m@a-cti.com" target="_blank">b2m@a-cti.com</a>>
wrote:<br>
</span></font>
<blockquote><font face="Monaco, Courier New"><span style="font-size:11pt">I have lot of entries like
1000,1001,1002 and so on, Is someone trying to get inside?
I believe they didn't in yet but how come we have cdr log
like this?<br>
<br>
"1004","1004","012972598371070","public","2013-05-12
07:30:07","","2013-05-12
07:30:07","0","0","NORMAL_CLEARING","c522fb02-bad5-11e2-8eaf-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","013972598371070","public","2013-05-12
07:30:07","","2013-05-12
07:30:07","0","0","NORMAL_CLEARING","c5571b44-bad5-11e2-8eb3-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","014972598371070","public","2013-05-12
07:30:07","","2013-05-12
07:30:07","0","0","NORMAL_CLEARING","c58eb428-bad5-11e2-8eb7-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","010972598371070","public","2013-05-12
07:30:08","","2013-05-12
07:30:08","0","0","NORMAL_CLEARING","c5c42d4c-bad5-11e2-8ebb-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","0061972598371070","public","2013-05-12
07:30:08","","2013-05-12
07:30:08","0","0","NORMAL_CLEARING","c5fe993c-bad5-11e2-8ebf-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","0041972598371070","public","2013-05-12
07:30:09","","2013-05-12
07:30:09","0","0","NORMAL_CLEARING","c63f939c-bad5-11e2-8ec3-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","000972598371070","public","2013-05-12
07:30:09","","2013-05-12
07:30:09","0","0","NORMAL_CLEARING","c67a9f5a-bad5-11e2-8ec7-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","006972598371070","public","2013-05-12
07:30:09","","2013-05-12
07:30:09","0","0","NORMAL_CLEARING","c6afc2fc-bad5-11e2-8ecb-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","002972598371070","public","2013-05-12
07:30:10","","2013-05-12
07:30:10","0","0","NORMAL_CLEARING","c6ec0b5e-bad5-11e2-8ecf-7bfd76dfd5d7","","","G729","G729"<br>
"1004","1004","810972598371070","public","2013-05-12
07:29:49","","2013-05-12
07:29:49","0","0","NORMAL_CLEARING","ba7999a4-bad5-11e2-8b6f-7bfd76dfd5d7","","","G729","G729"<br>
<br>
<br>
Thanks,<br>
Bala<br>
<br>
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