[Freeswitch-users] Blocking incoming calls

Wed Mar 13 15:28:42 MSK 2013

Why do we have such a long thread on this???

If you KNOW what IPs are contacting you, then firewall it.

If not or you don't want to do that, don't be surprised if calls hit FS.
But if you route properly, then it's to a different context or whatever so
there's NO harm done.
If you don't even want CDRs on that then disable the CDR when calls come in:

<action application="set" data="process_cdr=false"/>

I don't think there's anything else to add...

-Avi

On Wed, Mar 13, 2013 at 2:07 PM, Andrew Cassidy <
andrew at cassidywebservices.co.uk> wrote:

> They could still be registering, but to a different profile. Possibly on
> an internal network.
>
>
> On 13 March 2013 11:43, Alex Lake <alex at digitalmail.com> wrote:
>
>>  Ah, so presumably the OP doesn't have (for example) SIP handsets
>> registered to his box (presumably that's done on port 5060, too)
>>
>> Only if you don't know what IP addresses calls are going to be coming
>> from. In this case, we can probably ask the provider what their IP
>> addresses are and just explicitly allow them.
>>
>>  All fail2ban does is check the log files then set up relevant firewall
>> blacklist rules, so for the same job you get slightly more CPU load too.
>>
>> On 13 March 2013 10:28, Alex Lake <alex at digitalmail.com> wrote:
>>
>>> Isn't fail2ban the usual solution here?
>>>  > Hello. I hope someone can quickly see what I want to do and steer me
>>> in the right direction.
>>> >
>>> > I've looked at the documentation for acl.conf.xml and the SIP profile
>>> config file external.xml. I want to block incoming calls from all but a
>>> single external IP address and I'm sorry I just can't figure out how to do
>>> it or even if it can be done.
>>> >
>>> > We have a SIP trunk service with our VOIP provider. That means we have
>>> a static IP address which they use when they forward calls to us. They
>>> don't need to register, we just accept their calls but of course they have
>>> to be to our destination phone number. That all works and we have been very
>>> happy with Freeswitch for I don't know well over a year.
>>> >
>>> > Recently I became aware that someone is hammering our system trying to
>>> make calls. Our provider will only use port 5060 so that does mean our
>>> system is sitting on the internet with port 5060 open. Our dial plan works
>>> correctly and I can see in the log these calls are going nowhere. But they
>>> can be every few seconds and I suspect they might be using a lot of
>>> bandwidth just hammering the system.
>>> >
>>> > We will never receive calls from any other address than the one our
>>> VOIP provider will use to call us. So I just want to block SIP traffic from
>>> all addresses except theirs. I just want Freeswitch to stay silent when a
>>> call comes in on any other address, so there is no evidence that it is
>>> there to be attacked.
>>> >
>>> > I know I can do this with a firewall but I hope I can do it in
>>> Freeswitch itself. I am confused about the parameters auth-calls and
>>> auth-call and how to apply an access list that would restrict all calls to
>>> just one IP address. I did read somewhere in the docs that if you want to
>>> block calls you need to use a firewall and maybe that's the answer and so
>>> be it. Still I hope I can do it with Freeswitch so I can just apply the
>>> right ACL and sort the problem without creating new problems by introducing
>>> a firewall.
>>> >
>>> > Hope you can help.
>>> >
>>> >
>>> > Clive Lansink
>>> > Email: Clive at Lansink.Co.NZ
>>> > Phone: +64 9 520-4242 <%2B64%209%20520-4242>
>>> > Mobile: +64 21 663-999 <%2B64%2021%20663-999>
>>> > Fax: +64 21 789-150 <%2B64%2021%20789-150>
>>> >
>>> >
>>> _________________________________________________________________________
>>> > Professional FreeSWITCH Consulting Services:
>>> > consulting at freeswitch.org
>>> > http://www.freeswitchsolutions.com
>>> >
>>> > 
>>> > 
>>> >
>>> > Official FreeSWITCH Sites
>>> > http://www.freeswitch.org
>>> > http://wiki.freeswitch.org
>>> > http://www.cluecon.com
>>> >
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>>> > FreeSWITCH-users at lists.freeswitch.org
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>>> >
>>> >
>>>  > -----
>>> > No virus found in this message.
>>> > Checked by AVG - www.avg.com
>>> > Version: 2012.0.2240 / Virus Database: 2641/5668 - Release Date:
>>> 03/12/13
>>>  >
>>> >
>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
>>> FreeSWITCH-users mailing list
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>>> http://www.freeswitch.org
>>>
>>
>>
>>
>>  --
>> *Andrew Cassidy BSc (Hons) MBCS SSCA*
>> Managing Director
>>
>>
>> *T <info at cassidywebservices.co.uk> *03300 100 960  *F<info at cassidywebservices.co.uk>
>>  *03300 100 961
>> *E <info at cassidywebservices.co.uk> *andrew at cassidywebservices.co.uk
>> *W <info at cassidywebservices.co.uk> *www.cassidywebservices.co.uk
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>
>> FreeSWITCH-powered IP PBX: The CudaTel Communication Server
>>
>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://wiki.freeswitch.orghttp://www.cluecon.com
>>
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>>
>>
>>
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2012.0.2240 / Virus Database: 2641/5668 - Release Date: 03/12/13
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>>
>
>
> --
> *Andrew Cassidy BSc (Hons) MBCS SSCA*
> Managing Director
>
>
> *T <info at cassidywebservices.co.uk> *03300 100 960  *F<info at cassidywebservices.co.uk>
>  *03300 100 961
> *E <info at cassidywebservices.co.uk> *andrew at cassidywebservices.co.uk
> *W <info at cassidywebservices.co.uk> *www.cassidywebservices.co.uk
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>
>
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