[Freeswitch-users] How to reject a call and not log it in CDRs that contains unsupported ANCII characters?

Gregor Nanger gregor at infomedia.si
Wed Dec 20 09:29:43 UTC 2017 

Glad to help.
​ Just be carefull, if you also would like to use b_only. It only works if
you also have b leg loging enabled in conf file.​


On Wed, Dec 20, 2017, 03:01 Lyubo Popov <lpopov at blasterphone.com
<https://mltrk.io/link/mailto%3Alpopov%40blasterphone.com/jCUwHkcTexx2TytmrpF6>>
wrote:

> Thank you very much for the reply. The process_cdr variable is very
> useful and exactly what I was looking for. Appreciated!
>
>
> <https://mltrk.io/link/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail%26utm_term%3Dicon/jCUwHkcTexx2TytmrpF6> Virus-free.
> www.avast.com
> <https://mltrk.io/link/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail%26utm_term%3Dlink/jCUwHkcTexx2TytmrpF6>
> <https://mltrk.io/link/%23m_926543164795071026_m_-8463921194330766450_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2/jCUwHkcTexx2TytmrpF6>
>
> On Mon, Dec 18, 2017 at 8:37 PM, Gregor Nanger <gregor at infomedia.si
> <https://mltrk.io/link/mailto%3Agregor%40infomedia.si/jCUwHkcTexx2TytmrpF6>
> > wrote:
>
>> ​Hi, Lyubo!
>>
>> I had similar case. Use process_cdr variable in dialplan, if you do not
>> want to store in CDR.
>>
>> <action application="set" data="process_cdr=
>> ​false​
>> "/>
>>
>> ​Hope it helps, Gregor​
>>
>>
>> 2017-12-18 21:44 GMT+01:00 Michael Collins <msc at freeswitch.org
>> <https://mltrk.io/link/mailto%3Amsc%40freeswitch.org/jCUwHkcTexx2TytmrpF6>
>> >:
>>
>>> Hi Lyubo,
>>>
>>> In this case it may be better to see if your CDR parser can skip the
>>> non-numeric caller id values, perhaps by adding a validation check prior to
>>> performing the parse action. As a rule of thumb, if your CDR parser can be
>>> tripped up by the data it is parsing then it needs to be hardened. I'm sure
>>> many here would highly recommend sanitizing/validation as a best practice,
>>> particularly when handling data that comes from the public Internet.
>>> Another consideration is that you may actually want to have a record of
>>> these kinds of attacks in case there is a need to investigate an incident
>>> or otherwise analyze attack patterns.
>>>
>>> I would recommend that you change the behavior of the parser from
>>> "complaining" to "keeping the CDR database clean but logging invalid input
>>> for future reference."
>>>
>>> Hope this helps,
>>> -MC
>>>
>>>
>>> On Fri, Dec 15, 2017 at 1:11 PM, Lyubo Popov <koki.roul at gmail.com
>>> <https://mltrk.io/link/mailto%3Akoki.roul%40gmail.com/jCUwHkcTexx2TytmrpF6>
>>> > wrote:
>>>
>>>> Hello all,
>>>>
>>>> Maybe someone can help me with this problem and will be greatly
>>>> appreciated. We are getting calls with CallerID like this one  ‘hi'or‘x’='x'.
>>>> Later when our billing start parsing the CDRs it will complain because of
>>>> the first character "`". My question I suppose is, how to prevent such
>>>> calls to get added to the CDRs? We want to reject the call that has non
>>>> numeric CallerID and not get it added in the CDRs. This is what we have in
>>>> the dialplan.
>>>>
>>>> <extension name="Routing">
>>>>         <condition field="${radius_auth_result}" expression="0"/>
>>>>
>>>>         <!--
>>>>         <condition field="${h323-redirect-number}" expression="^(.+)$"
>>>> break="never">
>>>>             <action application="set" data="destination_number=$1" />
>>>>         </condition>
>>>>         -->
>>>>         <condition field="caller_id_number" expression="^([0-9]+)$">
>>>>             <anti-action application="hangup"/>
>>>> </condition>
>>>>         <condition field="destination_number" expression="^(.+)$">
>>>>             <!--<action application="info"/>-->
>>>>             <action application="export" data="nolocal:h323-call-
>>>> origin=originate"/>
>>>>             <action application="set" data="sip_h_X-accountcode=${accountcode}"
>>>> />
>>>>             <action application="set" data="call_direction=outbound" />
>>>>             <action application="set" data="hangup_after_bridge=true"/>
>>>>             <action application="set" data="continue_on_fail=true"/>
>>>>             <action application="set" data="inherit_codec=true" />
>>>>             <action application="set" data="call_timeout=20"/>
>>>>             <action application="set" data="fail_on_single_reject=USER_BUSY"
>>>> />
>>>>             <action application="set" data="origination_caller_id_
>>>> name=${sip_req_user}"/>
>>>>             <action application="set" data="origination_caller_id_
>>>> number=${sip_from_user}"/>
>>>>             <action application="set" data="execute_on_answer=sched_hangup
>>>> +${h323-credit-time} alloted_timeout" />
>>>>             <action application="bridge" data="{sip_invite_from_uri=
>>>> sip:${sip_from_user}@${sip_network_ip}}sofia/internal/${
>>>> destination_number}@x.x.x.x:5060" />
>>>>             <action application="hangup" data="${bridge_hangup_cause}"/
>>>> >
>>>>         </condition>
>>>>     </extension>
>>>>
>>>> Thank you all!
>>>>
>>>> L.Popov
>>>>
>>>>
>>>> <https://mltrk.io/link/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail%26utm_term%3Dicon/jCUwHkcTexx2TytmrpF6> Virus-free.
>>>> www.avast.com
>>>> <https://mltrk.io/link/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail%26utm_term%3Dlink/jCUwHkcTexx2TytmrpF6>
>>>> <https://mltrk.io/link/%23m_926543164795071026_m_-8463921194330766450_m_2242263481946948631_m_2040158889290273727_m_-7626445720286026976_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2/jCUwHkcTexx2TytmrpF6>
>>>>
>>>> ____________________________________________________________
>>>> _____________
>>>> Professional FreeSWITCH Consulting Services:
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>>>>
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>>>>
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>>>> http://confluence.freeswitch
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>>>> .org
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>>>>
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>>>>
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>>>> http://lists
>>>> <https://mltrk.io/link/http%3A%2F%2Flists/jCUwHkcTexx2TytmrpF6>.
>>>> freeswitch.org/mailman/options/freeswitch-users
>>>> http://www.freeswitch.org
>>>> <https://mltrk.io/link/http%3A%2F%2Fwww.freeswitch.org/jCUwHkcTexx2TytmrpF6>
>>>>
>>>
>>>
>>> ____________________________________________________________
>>> _____________
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>>>
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>>>
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>>> .org
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>>>
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>>> http://lists
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>>>
>>
>>
>>
>> --
>> Gregor Nanger
>>
>> *CTO*
>> t./f.: 00386 (0) 7 6000 308/309 • m:. 00386 (0)41 756485
>> • Infomedia d.o.o. • Jerebova 3, Novo mesto, Slovenia
>> • www.infomedia.si
>> <https://mltrk.io/link/http%3A%2F%2Fwww.infomedia.si/jCUwHkcTexx2TytmrpF6>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> <https://mltrk.io/link/mailto%3Aconsulting%40freeswitch.org/jCUwHkcTexx2TytmrpF6>
>>
>> <https://mltrk.io/link/http%3A%2F%2Fwww.freeswitchsolutions.com/jCUwHkcTexx2TytmrpF6>
>> http://www <https://mltrk.io/link/http%3A%2F%2Fwww/jCUwHkcTexx2TytmrpF6>.
>> freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> <https://mltrk.io/link/http%3A%2F%2Fwww.freeswitch.org/jCUwHkcTexx2TytmrpF6>
>>
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>>
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>>
>
>
>
> --
> Atenciosamente,
> ============================
> Lyubo Popov
> CEO - BlasterPhone LLC
> Tel: 4003-1556 ( Outside Brazil 55 11 4003-1556)
> iNum: +883 510001-354111
> <https://mltrk.io/link/tel%3A%2B883%2520510%2520001%2520354%2520111/jCUwHkcTexx2TytmrpF6>
> Website: http://www.blastervoip.com.br/
> <https://mltrk.io/link/http%3A%2F%2Fwww.blastervoip.com.br%2F/jCUwHkcTexx2TytmrpF6>
> ============================
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
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>
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>
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>
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