[Freeswitch-users] Blocking incoming calls
Alex Lake
alex at digitalmail.com
Wed Mar 13 15:20:47 MSK 2013
When you say "to a different profile" - you're talking about on the same
box, but a different port?
> 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
> <mailto: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
>> <mailto: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 <mailto:Clive at Lansink.Co.NZ>
>> > Phone: +64 9 520-4242 <tel:%2B64%209%20520-4242>
>> > Mobile: +64 21 663-999 <tel:%2B64%2021%20663-999>
>> > Fax: +64 21 789-150 <tel:%2B64%2021%20789-150>
>> >
>> >
>> _________________________________________________________________________
>> > Professional FreeSWITCH Consulting Services:
>> > consulting at freeswitch.org <mailto: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
>> <mailto:FreeSWITCH-users at lists.freeswitch.org>
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>> >
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>> >
>> >
>> > -----
>> > No virus found in this message.
>> > Checked by AVG - www.avg.com <http://www.avg.com>
>> > Version: 2012.0.2240 / Virus Database: 2641/5668 - Release
>> Date: 03/12/13
>> >
>> >
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org <mailto: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
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>>
>>
>>
>> --
>> *Andrew Cassidy BSc (Hons) MBCS SSCA*
>> Managing Director
>>
>>
>> *T <mailto:info at cassidywebservices.co.uk> *03300 100 960
>> <tel:03300%20100%20960> *F <mailto:info at cassidywebservices.co.uk>
>> *03300 100 961 <tel:03300%20100%20961>
>> *E <mailto:info at cassidywebservices.co.uk>
>> *andrew at cassidywebservices.co.uk
>> <mailto:andrew at cassidywebservices.co.uk>
>> *W <mailto:info at cassidywebservices.co.uk>
>> *www.cassidywebservices.co.uk <http://www.cassidywebservices.co.uk>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org <mailto: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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>>
>>
>> No virus found in this message.
>> Checked by AVG - www.avg.com <http://www.avg.com>
>> Version: 2012.0.2240 / Virus Database: 2641/5668 - Release Date:
>> 03/12/13
>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org <mailto: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
> <mailto: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 <mailto:info at cassidywebservices.co.uk> *03300 100 960 *F
> <mailto:info at cassidywebservices.co.uk> *03300 100 961
> *E <mailto:info at cassidywebservices.co.uk>
> *andrew at cassidywebservices.co.uk <mailto:andrew at cassidywebservices.co.uk>
> *W <mailto:info at cassidywebservices.co.uk>
> *www.cassidywebservices.co.uk <http://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
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> http://www.freeswitch.org
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 2012.0.2240 / Virus Database: 2641/5668 - Release Date: 03/12/13
>
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