Anonymous Call Blacklist

[mukkacow]

Hello,

I have a problem for blacklisting some anonymous calls. One of my providers handle anonymous call like this:

From: "Anonymous" <sip:xx.xx.xx.xx>;tag=xxxxxxxxx

I have set *non* in "Blacklisted numbers" but this seems work only for providers that handle anonymous calls like this:

From: "Anonymous" <sip:anonymous@xx.xx.xx.xx>;tag=xxxxxxxxx

Are there any solutions to solve this problem ?

 

[sip.bg]

Add Anonymous, anonymous, Unavailable and unavailable, one per line, into blacklist for numbers.

 

[mukkacow]

Hi @ship.bg,

It doesn't work. It only works if after sip: you have something (eg. sip:Anonymous@xx.xx.xx.xx). In this case the provider if call is anonymous does't write anything after sip: and the result is that blacklist will not work.

:-(

 

[sip.bg]

Providers usually send 'Anonymous' or 'Unavailable', not an empty string. If string is empty, you don't have criteria to block call.
Analyse your traffic.

 

[mukkacow]

When you have a situation like this and you have for eg. anonymous after sip: then you can block it using the "Blacklisted numbers".

From: "Anonymous" <sip:anonymous@sip.***.***>;tag=as2c95129b
Call-ID: 5d26af6153ac3f533c67ed154627f33e@sip.***.***
CSeq: 102 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Content-Type: application/sdp
Date: Tue, 14 Nov 2017 20:01:23 GMT
Supported: replaces, timer

In my case the provider when calls are anonymous doesn't write anything after sip: so there is no way to block it using "Blacklisted numbers".

From: "Anonymous"<sip:62.***.***.***>;tag=i5uqs72mh33usixj.o
Call-ID: [email protected]~3o~1o
CSeq: 160 INVITE
Expires: 300
Content-Disposition: session
Content-Type: application/sdp

In this case noway to block them ?

 

[sip.bg]

In this case noway to block them ?

I'm afraid, not.

 

[mukkacow]

Thanks you. Will try contact the provider.