[AsteriskBrasil] Res: Res: Res: RES: Vulnerabilidade Asterisk

Quarta Novembro 4 18:09:37 BRST 2009

Uma boa prática é ler o email até o final..

On Nov 4, 2009, at 5:01 PM, José Eduardo C. Mazolini wrote:

> Qual versão do asterisk?
> To usando 1.4.21.2

...
> Testado com asterisk 1.4.26
...

;-)

>
> []´s

[]'s

>
> Eduardo Mazolini
> (19) 9191-2705
>
>
>
> On Nov 4, 2009, at 2:37 PM, José Eduardo C. Mazolini wrote:
>
>> Testei alwaysauthreject=yes
>>
>>
>> Ainda sim o asterisk trata diferente. Ou seja comeu mais
>> processador, mais rede e o assunto mesmo não resolveu.
>> Portanto tanto faz com ou sem.
>>
>> Ramal 1 inexistente:
>> x-lite: REGISTER
>> Asterisk: 401 Unauthorized
>> x-lite: REGISTER
>> Asterisk: 401 Unauthorized
>> x-lite: REGISTER
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>> Asterisk: 401 Unauthorized
>>
>> Ramal 2 existente
>> x-lite: REGISTER
>> Asterisk: 100 Trying
>> Asterisk: 401 Unauthorized
>> x-lite: REGISTER
>> Asterisk: 100 Trying
>> Asterisk: 403 Forbidden (Bad auth)
>>
>>
>> Eduardo Mazolini
>> (19) 9191-2705
>>
>>
>>
>> ----- Mensagem original ----
>> De: Saulo Quinteiro <sauloquinteiro em gmail.com>
>> Para: asteriskbrasil em listas.asteriskbrasil.org
>> Enviadas: Quarta-feira, 4 de Novembro de 2009 14:34:55
>> Assunto: Re: [AsteriskBrasil] Res:  RES: Vulnerabilidade Asterisk
>>
>> José da uma olhada nesse link.
>>
>> http://www.voipexperts.com.br/tutoriais-sobre-asterisk-e-voip/seguranca-no-asterisk
>>
>> E um Firewall bem elaborado ajuda bastante tb.
>> Vai ajudar no seu problema.
>>
>>
>> Saulo Quinteiro Dos Santos
>> Fone: 41-2141-9567
>> Graduando em Ciência da Computação - UFPR
>> msn : sauloquinteiro em gmail.com
>> e-mail: saulo em mpsinf.com.br
>> cel : 41-9927-5236
>>
>>
>>
>>
>> José Eduardo C. Mazolini escreveu:
>>> Eu acabo de fazer um teste com X-LITE
>>> E o asterisk é um problema, aconselho colocar um router SIP na
>>> frente e
>>> tratar esse problema.
>>> Ele não devia mostrar para o atacante qual ramal existe qual não.
>>> Pois
>>> depois de identificado o ramal existente ele passa a testar senhas.
>>>
>>> Obrigado pela dica do programa pois é necessário criar algo
>>> automático
>>> pra bloqueio de intrusos.
>>> Já ouvi falar em um serviço semelhante a DNS onde são cadastrados
>>> maquinas que geram ataque e esse registro dura algumas horas.
>>> Assim se alguem atacar meu asterisk eu bloqueio e registro esse ip
>>> la,
>>> vc antes de autorizar uma conexão já confere nesta lista se tiver
>>> vc ja
>>> bloqueia de cara o atacante.
>>>
>>> Isso pode ser complicado pois alguem mal intencionado pode fazer
>>> falsas
>>> acusações contra vc e vc fica bloqueado sem ter feito nada.
>>> Mas criar uma base desta com controle sobre os que fazem a denucia,
>>> só
>>> servidores da empresa, grupo de trabalho, empresas que possuem
>>> negocio
>>> em comum pode ajudar.
>>>
>>> Observe o que aconteceu:
>>>
>>> Ramal 1 inexistente:
>>> x-lite: REGISTER
>>> Asterisk: 404 Not found
>>>
>>> Ramal 2 existente
>>> x-lite: REGISTER
>>> Asterisk: 100 Trying
>>> Asterisk: 401 Unauthorized
>>> x-lite: REGISTER
>>> Asterisk: 100 Trying
>>> Asterisk: 403 Forbidden (Bad auth)
>>>
>>>
>>>
>>>
>>> Eduardo Mazolini
>>> (19) 9191-2705
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *De:* Luciano Antonio Borguetti Faustino <lucianoborguetti.listas em gmail.com
>>>>
>>> *Para:* asteriskbrasil em listas.asteriskbrasil.org
>>> *Enviadas:* Quarta-feira, 4 de Novembro de 2009 13:40:10
>>> *Assunto:* Re: [AsteriskBrasil] RES: Vulnerabilidade Asterisk
>>>
>>> Eder,
>>>
>>> Interessante,
>>>
>>> Trantando o problema mais profissionamente acoselho a instalação de
>>> um
>>> IDS/IPS (Snort por exemplo -http://www.snort.org/), onde você
>>> consegue
>>> identificar esses tipos de ataques e criar ações, como exemplo o
>>> bloqueio do host atacante.
>>>
>>> []s,
>>>
>>> 2009/11/4 Itamar Reis Peixoto <itamar em ispbrasil.com.br
>>> <mailto:itamar em ispbrasil.com.br>>
>>>
>>>   eu continuo com a minha opiniao de que iptables e' pra boiola
>>>
>>>   route add -host 208.38.164.96 reject
>>>
>>>   resolve o problema !
>>>
>>>
>>>
>>>   2009/11/4 Eder Souza <eder.souza em bsd.com.br
>>>   <mailto:eder.souza em bsd.com.br>>
>>>>
>>>> Log do Asterisk segue ae para vc ver um ataque massivo chutando
>>>   users sips, repare quantos users ele conseguiu chutar em apenas um
>>>   segundo !!!
>>>>
>>>>
>>>> uma amostra do log referente ao ataque !!!
>>>>
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"0"<sip:0 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"1"<sip:1 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"2"<sip:2 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"3"<sip:3 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"4"<sip:4 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"5"<sip:5 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"6"<sip:6 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"7"<sip:7 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"8"<sip:8 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"9"<sip:9 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"10"<sip:10 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"11"<sip:11 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"12"<sip:12 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"13"<sip:13 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"14"<sip:14 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"15"<sip:15 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"16"<sip:16 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"17"<sip:17 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"18"<sip:18 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"19"<sip:19 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"20"<sip:20 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"21"<sip:21 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"22"<sip:22 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"23"<sip:23 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"24"<sip:24 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"25"<sip:25 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"26"<sip:26 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"27"<sip:27 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"28"<sip:28 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"29"<sip:29 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"30"<sip:30 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"31"<sip:31 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"32"<sip:32 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"33"<sip:33 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"34"<sip:34 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"35"<sip:35 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"36"<sip:36 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"37"<sip:37 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"38"<sip:38 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"39"<sip:39 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"40"<sip:40 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"41"<sip:41 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"42"<sip:42 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"43"<sip:43 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"44"<sip:44 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"45"<sip:45 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"46"<sip:46 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"47"<sip:47 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"48"<sip:48 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"49"<sip:49 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"50"<sip:50 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"51"<sip:51 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"52"<sip:52 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"53"<sip:53 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"54"<sip:54 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"55"<sip:55 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"56"<sip:56 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"57"<sip:57 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"58"<sip:58 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:26] NOTICE[2751] chan_sip.c: Registration from
>>>   '"59"<sip:59 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"60"<sip:60 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"61"<sip:61 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"62"<sip:62 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"63"<sip:63 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"64"<sip:64 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"65"<sip:65 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>> [Oct 12 09:31:27] NOTICE[2751] chan_sip.c: Registration from
>>>   '"66"<sip:66 em IP>' failed for '208.38.164.96' - No matching peer
>>> found
>>>
>>>
>>>   ------------
>>>
>>>   Itamar Reis Peixoto
>>>
>>>   e-mail/msn/google talk/sip: itamar em ispbrasil.com.br
>>>   <mailto:itamar em ispbrasil.com.br>
>>>   skype: itamarjp
>>>   icq: 81053601
>>>   +55 11 4063 5033
>>>   +55 34 3221 8599
>>>
>>>   _______________________________________________
>>> http://www.voipmania.com.br
>>>   Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
>>>   Promoção por tempo limitado!
>>>   Acesse agora http://promo.voipmania.com.br
>>>
>>>   _______________________________________________
>>>   Lista de discussões AsteriskBrasil.org
>>> AsteriskBrasil em listas.asteriskbrasil.org
>>>   <mailto:AsteriskBrasil em listas.asteriskbrasil.org>
>>> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil
>>>
>>>
>>>
>>>
>>> --  
>>> #!/bin/bash
>>>
>>> Luciano Antonio Borguetti Faustino
>>> GNU/Linux user number: 339110
>>> ICQ UIN number: 82092097 - ICQ ainda na atividade :)
>>> http://lucianoborguetti.blogspot.com
>>>
>>> Preconceito é opinião sem conhecimento.
>>>
>>> :wq
>>>
>>> ------------------------------------------------------------------------
>>> Veja quais são os assuntos do momento no Yahoo! + Buscados: Top 10
>>> <http://br.rd.yahoo.com/mail/taglines/mail/*http://br.maisbuscados.yahoo.com/
>>>>
>>> - Celebridades
>>> <http://br.rd.yahoo.com/mail/taglines/mail/*http://br.maisbuscados.yahoo.com/celebridades/
>>>>
>>> - Música
>>> <http://br.rd.yahoo.com/mail/taglines/mail/*http://br.maisbuscados.yahoo.com/m%C3%BAsica/
>>>>
>>> - Esportes
>>> <http://br.rd.yahoo.com/mail/taglines/mail/*http://br.maisbuscados.yahoo.com/esportes/
>>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>>
>>> _______________________________________________
>>> http://www.voipmania.com.br
>>> Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
>>> Promoção por tempo limitado!
>>> Acesse agora http://promo.voipmania.com.br
>>>
>>> _______________________________________________
>>> Lista de discussões AsteriskBrasil.org
>>> AsteriskBrasil em listas.asteriskbrasil.org
>>> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil
>>
>> _______________________________________________
>> http://www.voipmania.com.br
>> Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
>> Promoção por tempo limitado!
>> Acesse agora http://promo.voipmania.com.br
>>
>> _______________________________________________
>> Lista de discussões AsteriskBrasil.org
>> AsteriskBrasil em listas.asteriskbrasil.org
>> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil
>>
>>
>>
>>
>> ____________________________________________________________________________________
>> Veja quais são os assuntos do momento no Yahoo! +Buscados
>> http://br.maisbuscados.yahoo.com
>>
>> _______________________________________________
>> http://www.voipmania.com.br
>> Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
>> Promoção por tempo limitado!
>> Acesse agora http://promo.voipmania.com.br
>>
>> _______________________________________________
>> Lista de discussões AsteriskBrasil.org
>> AsteriskBrasil em listas.asteriskbrasil.org
>> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil
>
>
> _______________________________________________
> http://www.voipmania.com.br
> Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
> Promoção por tempo limitado!
> Acesse agora http://promo.voipmania.com.br
>
> _______________________________________________
> Lista de discussões AsteriskBrasil.org
> AsteriskBrasil em listas.asteriskbrasil.org
> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil
>
>
>
>       
> ____________________________________________________________________________________
> Veja quais são os assuntos do momento no Yahoo! +Buscados
> http://br.maisbuscados.yahoo.com
>
> _______________________________________________
> http://www.voipmania.com.br
> Telefone IP sem fio Gigaset A580IP por 6 x R$59,90.
> Promoção por tempo limitado!
> Acesse agora http://promo.voipmania.com.br
>
> _______________________________________________
> Lista de discussões AsteriskBrasil.org
> AsteriskBrasil em listas.asteriskbrasil.org
> http://listas.asteriskbrasil.org/mailman/listinfo/asteriskbrasil