Blocking voip at the router level

Archived from groups: comp.dcom.voice-over-ip (More info?)

I guess you could create an ACL to deny SIP traffic. Without SIP you
won't be able to get call setup messages through the router. You may
also want to include H.323 as well.



-----Original Message-----
From: Henry Cabot Henhouse III [mailto:sooper_chicken@hotmail.com]
Posted At: Monday, August 08, 2005 4:13 PM
Posted To: comp.dcom.voice-over-ip
Conversation: Blocking voip at the router level
Subject: Blocking voip at the router level


Do most of the commercial voip providers, Vonage, Callvantage, etc. use
the same ports? I'd like to block voip traffic at our Cisco 26xx router
and was wondering if there was an easy way to do it...

Thanks
Dave

Archived from groups: comp.dcom.voice-over-ip (More info?)

Then us sneaky people can use IAX  

"abomb" <abomb_60@yahoo.com> wrote in message
news:03sKe.44$Cw5.43@chiapp18.algx.net...
> I guess you could create an ACL to deny SIP traffic. Without SIP you
> won't be able to get call setup messages through the router. You may
> also want to include H.323 as well.
>
>
>
> -----Original Message-----
> From: Henry Cabot Henhouse III [mailto:sooper_chicken@hotmail.com]
> Posted At: Monday, August 08, 2005 4:13 PM
> Posted To: comp.dcom.voice-over-ip
> Conversation: Blocking voip at the router level
> Subject: Blocking voip at the router level
>
>
> Do most of the commercial voip providers, Vonage, Callvantage, etc. use
> the same ports? I'd like to block voip traffic at our Cisco 26xx router
> and was wondering if there was an easy way to do it...
>
> Thanks
> Dave
>
>
>

Archived from groups: comp.dcom.voice-over-ip (More info?)

Sneaky nerd type people you mean  

What is this modern technology you speak of, this IAX-D? If someone had an
off the shelf Vonage or Callvantage box, would this be easy for them to
configure?




"Paul" <webster1@ihatespam.nizon.ca> wrote in message
news:wovKe.179059$%K2.151313@pd7tw1no...
> Then us sneaky people can use IAX  
>
> "abomb" <abomb_60@yahoo.com> wrote in message
> news:03sKe.44$Cw5.43@chiapp18.algx.net...
>> I guess you could create an ACL to deny SIP traffic. Without SIP you
>> won't be able to get call setup messages through the router. You may
>> also want to include H.323 as well.
>>
>>
>>
>> -----Original Message-----
>> From: Henry Cabot Henhouse III [mailto:sooper_chicken@hotmail.com]
>> Posted At: Monday, August 08, 2005 4:13 PM
>> Posted To: comp.dcom.voice-over-ip
>> Conversation: Blocking voip at the router level
>> Subject: Blocking voip at the router level
>>
>>
>> Do most of the commercial voip providers, Vonage, Callvantage, etc. use
>> the same ports? I'd like to block voip traffic at our Cisco 26xx router
>> and was wondering if there was an easy way to do it...
>>
>> Thanks
>> Dave
>>
>>
>>
>
>

Archived from groups: comp.dcom.voice-over-ip (More info?)

Henry Cabot Henhouse III wrote:
> Sneaky nerd type people you mean  
>
> What is this modern technology you speak of, this IAX-D? If someone had an
> off the shelf Vonage or Callvantage box, would this be easy for them to
> configure?

It's IAX, not IAX-D. The " " was a smiley.

IAX is a prtocol used for VOIP, like SIP. The major difference between
it and SIP is that both the control and data go on the same udp port,
and the software demultiplexes the call data and control data.

GIYF. ;-)

http://www.americasnetwork.com/americasnetwork/article/...


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Archived from groups: comp.dcom.voice-over-ip (More info?)

Well that would require an Asterisk PBX. I suppose in that case you
would also need to block SCCP (for Cisco Phones) and Unistim (for Nortel
Phones).

I guess you could simply block RTP. Then phones may ring but no actual
voice will be sent or received. That always makes for confused users  


-----Original Message-----
From: Paul [mailto:webster1@ihatespam.nizon.ca]
Posted At: Wednesday, August 10, 2005 6:42 PM
Posted To: comp.dcom.voice-over-ip
Conversation: Blocking voip at the router level
Subject: Re: Blocking voip at the router level


Then us sneaky people can use IAX  

"abomb" <abomb_60@yahoo.com> wrote in message
news:03sKe.44$Cw5.43@chiapp18.algx.net...
> I guess you could create an ACL to deny SIP traffic. Without SIP you
> won't be able to get call setup messages through the router. You may
> also want to include H.323 as well.
>
>
>
> -----Original Message-----
> From: Henry Cabot Henhouse III [mailto:sooper_chicken@hotmail.com]
> Posted At: Monday, August 08, 2005 4:13 PM Posted To:
> comp.dcom.voice-over-ip
> Conversation: Blocking voip at the router level
> Subject: Blocking voip at the router level
>
>
> Do most of the commercial voip providers, Vonage, Callvantage, etc.
> use the same ports? I'd like to block voip traffic at our Cisco 26xx
> router and was wondering if there was an easy way to do it...
>
> Thanks
> Dave
>
>
>

Archived from groups: comp.dcom.voice-over-ip (More info?)

"Henry Cabot Henhouse III" <sooper_chicken@hotmail.com> wrote in message
news:9MidnWkxAdV0IWrfRVn-iA@mpowercom.net...
> Do most of the commercial voip providers, Vonage, Callvantage, etc. use
> the same ports? I'd like to block voip traffic at our Cisco 26xx router
> and was wondering if there was an easy way to do it...
>

Just block the RTP stream.


Jonathan