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mikebrown Posted:
there, Please
check out -

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Oct 24, 2017 at 22:29:48

mikebrown Posted:
Hello, I think
you should consult
it with the Expert
they can surely
help you

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Jun 24, 2017 at 09:15:34

Haniltery Posted:
For wipe call
history also some
of the offline, in
gengral , it
usually apply to

In The Forum:
How to Delete call history from online account?
On May 09, 2017 at 06:14:26

diana87 Posted:
You have to use
VPN service to
and get free
access while

In The Forum:
Recent calling problem from Egypt
On May 02, 2017 at 17:28:06

dconnor Posted:
What is the main
number on the
account? And
which one is the
virtual number?

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 18:52:02

Trafford Posted:
Seems like a
question. We
rely exclusively
on a Vonage system
for our

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 10:42:50

diazou Posted:
Hello, It's
compatible with
Android your phone
? Thanks!

In The Forum:
IP PBX for small business
On Mar 28, 2017 at 12:42:33

jeddaisg Posted:
Hi all We have
a Vonage VOIP
system for our
office. Lately,
our call quality

In The Forum:
Ethernet Cable; Wiring schematic? 568-B?
On Feb 23, 2017 at 18:33:52

beast321 Posted:
I don't know if
you heard, that
many more
Dreamcast games
are opened up

In The Forum:
Fax - Tivo - Alarms
Using phone as a dial up modem for Dreamcast Gaming
On Feb 16, 2017 at 03:16:51

Av8rix Posted:
Sorry to start a
new thread on an
old topic but when
I google “Vonage
MAC address

In The Forum:
New adapter and router -- MAC change
On Jan 11, 2017 at 01:07:21

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Vonage If you'd like, i can provide a step by step demonstration of how easy it is utilizing

If you'd like, i can provide a step by step demonstration of how easy it is utilizing free tools on the web... RTP is not encrypted, SRTP is the secure protocol.

My network configuration is as follows:

[cable modem]
(eth0 public side)
[linux Firewall]
-[vonage router]
- |
[pc] [pc]

on the linux firewall, i used the following command before making a test phone call to an automated weatherline (301)797-9797

tcpdump -i eth1 -s 1518 -w rtp.cap host 172.xx.yy.251

after issuing that command, I dialed the number, and listened on the line for ~ 6 seconds. I then killed the capture, and downloaded it to my local XP laptop.

After installing the latest version of ethereal, obtained from ( I opened the capture file by double clicking it....

After opening the file, the SIP protocol could be clearly seen, within the SIP protocol there's a handshake process, where the local device 'invites' the remote peer. This invitation looks like this:

No. Time Source Destination Protocol Info
8 3.728364 SIP/SDP Request: INVITE, with session description

Frame 8 (1275 bytes on wire, 1275 bytes captured)
Ethernet II, Src: 00:12:17:de:d8:92, Dst: 00:02:b3:b3:0f:bd
Internet Protocol, Src Addr: (, Dst Addr: (
User Datagram Protocol, Src Port: 5061 (5061), Dst Port: 5061 (5061)
Source port: 5061 (5061)
Destination port: 5061 (5061)
Length: 1241
Checksum: 0x03d3 (correct)
Session Initiation Protocol
Request-Line: INVITE SIP/2.0
Method: INVITE
Resent Packet: False
Message Header
Via: SIP/2.0/UDP;branch=z9hG4bK-c1eb8f36
From: 443-541-3368 <>;tag=a7c6b5b382060016o0
SIP Display info: 443-541-3368
SIP from address:
SIP tag: a7c6b5b382060016o0
To: <>
SIP to address:
Call-ID: a579d7b7-c0cba5e2@
CSeq: 102 INVITE
Max-Forwards: 70
Proxy-Authorization: Digest username="14435413368",realm="",nonce="424760


Contact: 443-541-3368 <sip:14435413368@>
Expires: 240
User-Agent: 001217DED892 Linksys/RT31P2-2.0.12(LI)
Content-Length: 426
Supported: x-sipura
Content-Type: application/sdp
Message body

Both phone numbers can be clearly seen and is unencrypted. (this re-enforces my previous statement about individuals being able to capture based on phone numbers dialed) I could paste the actual text data contained in the RTP packets, but that would be useless considering it's audio data. This is how one would decode the data if one were to 'obtain a capture'.

1.) open up the capture file
2.) select the first RTP packet listed in the upper window (the window where a summary of the packets are listed) then click statistics in the menu bar, then select 'RTP' which is the fourth entry from the bottom. That menu will then expand into two additional options "Show All Streams, and Stream Analysis". Select stream analysis.
3.) Another window will pop up, with the name "Ethereal: RTP Stream Analysis", don't worry about the data contained in the window. Just look at the buttons down at the bottom of that window. Select the "Save Payload..." button, and specify a file name like "".

At this point, just double click the file (which is at the top of your C drive) and listen.

Congratulations, you just accessed unencrypted data, and have the ability to listen to any conversation you capture.

Here's a thread of an individual asking how to do what I just described:

and here's a url on ethereal's website which describes what to do with the capture once you obtain it:

and here's a capture file that you can cut your newly developed RTP decoding teeth on:

Read The Full Thread:

Security: Lack of response from customercare...

What's the procedure to cancel the service, just call the main number and say i
Anyone taking the time and energy to rebuild and listen to my conversations is
That's where you're mistaken, if vonage is your only service, or you mistakenly
Like I said. While this may be a concern for you, anyone that expends the time and
Maybe Maxwell Smart could loan you "The Cone Of Silence" :-D Seriously, if security
True, and I'd be willing to pay more money. The thing that really pisses me off is
As far as I know it is secure...You have SIP which initiates the call and then RTP
:twisted: I'm busily surrounding my house with lead and searching for hidden
If you'd like, I can take you to the cross-box and show you how to put your butt-set

GardRailz posted "If you'd like, i can provide a step by step demonstration of how easy it is utilizing" on 02/17/2005

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