Category Archives: VoIP Security

Blue Box #79: Asterisk vulnerabilities, VoiceCon/VON coverage, eavesdropping, FBI, ZFone, P2P, VoIP security news and more

Synopsis:  Blue Box #79: Asterisk vulnerabilities, VoiceCon/VON coverage, eavesdropping, FBI, ZFone, P2P, VoIP security news and more


Welcome to Blue Box: The VoIP Security Podcast #78, a 32-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 15MB) or subscribe to the RSS feed to download the show automatically. 

NOTE: This show was originally recorded on March 27, 2008. Yes, that was over two months ago… we know…

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #78: Cisco IP phone vulnerabilties, WiFi handset insecurity, IETF security-related news, VoIP security news, listener comments and more

Synopsis:  Blue Box #78: Cisco IP phone vulnerabilties, WiFi handset insecurity, IETF security-related news, VoIP security news, listener comments and more


Welcome to Blue Box: The VoIP Security Podcast #78, a 40-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 17MB) or subscribe to the RSS feed to download the show automatically. 

NOTE: This show was originally recorded on February 25, 2008. Yes, that was two months ago… we know!

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #77: Skype security vulnerability, German gov’t looks at trojans, undersea cable cuts, Microsoft and Yahoo, VoIP security news and more

Synopsis: Blue Box #77: Skype security vulnerability, German gov’t looks at trojans, undersea cable cuts, Microsoft and Yahoo, VoIP security news and more


Welcome to Blue Box: The VoIP Security Podcast #76, a 36-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 17MB) or subscribe to the RSS feed to download the show automatically. 

NOTE: This show was originally recorded on February 4, 2008.

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE#024: An Update on Blue Box, Upcoming Shows and A Request For Assistance

Synopsis: Special Edition #24: An Update on Blue Box, upcoming shows and a request regarding production assistance


Welcome to Blue Box: The VoIP Security Podcast Special Edition #24, a 17-minute update on the status of Blue Box episodes, the shows we are attending and a request regarding production assistance.

Download the show here (MP3, 8MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


Show Content:

In this special edition, we provide an update on the status of Blue Box episodes and our travel schedule over the next few weeks.  Specifically:

  • IETF-71, March 10-14, Philadelphia, PA, USA
    • Dan will be at IETF 71 next week attending the sessions related to Real-time Applications and Infrastructure (RAI)
    • There will be audio streaming and IM chatrooms if you you would like to listen in to IETF sessions. Watch the VOIPSA blog for more information.
  • VON.x, March 17-20, San Jose, CA, USA
    • Jonathan will be attending
    • The will be a dinner on Tuesday evening, March 18th, hosted by Dean Elwood to which Blue Box listeners are invited. Please RSVP by this coming Wednesday, March 12th, preferably in the Facebook event or if you avoid Facebook via email to Dean. Jonathan will be there as well as Martyn Davies and a number of VoIP bloggers and other interesting folks.
  • VoiceCon Orlando, March 17-20, Orlando, FL, USA
    • Dan will be attending and moderating two panels (voip security and open source) and participating in a keynote panel on social networking and enterprise communications.
    • Dan is looking to set up a dinner, probably on Tuesday evening. Watch the blog for more info.
    • Longtime listener and commenter Craig Bowser will also be there.

We also discussed the challenges we are experiencing finding the time to do post-production on all the recordings we are making of interviews and panels to turn them into Special Editions. To that end, we are wondering if any listeners would be willing to assist in the post-production of some of these recordings. More information is available on the Blue Box website (and obviously in the podcast).

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box #76: Cisco, Skype and BT vulnerabilities, when SIP looks like SPIT, VoIP security threat predictions and the FBI forgets to pay their bills, plus listener comments and more…

Synopsis: Blue Box #76: Cisco, Skype and BT vulnerabilities, when SIP looks like SPIT, VoIP security threat predictions and the FBI forgets to pay their bills, plus listener comments and more…


Welcome to Blue Box: The VoIP Security Podcast #76, a 38-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 17MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE#023: Interview with Bob Bradley of Sonus Networks

Synopsis: Interview with Bob Bradley of Sonus Networks


Welcome to Blue Box: The VoIP Security Podcast Special Edition #23, a 19-minute interview with Bill Bradley, Product Line Manager for Security Solutions at Sonus Networks.  Recorded at Fall VON in Boston at the end of October 2007.

Download the show here (MP3, 9MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


Show Content:

sonusnetworks.jpgIn this Special Edition, I sat down with Bob Bradley, Product Line Manager for Security Solutions at Sonus Networks to talk about their products and how they protect VoIP and other traffic. In particular we discussed the Sonus Network Border Switch including how it fits into network installations and how it is different from other similar products on the market.  We also covered some general issues around SIP security and talked about the company in general.

I will candidly admit that I was not very aware of Sonus’ solutions prior to this podcast, but since this time I’ve found their products running in a range of places I had not noticed them before.  I believe you all will find this a useful introduction to an interesting company and useful solutions.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box #75: Asterisk vulnerability, SANS paper on VoIP security, SPIT, tons of listener comments and much more…

Synopsis: Blue Box #75: Asterisk vulnerability, SANS paper on VoIP security, SPIT, tons of listener comments and much more…


Welcome to Blue Box: The VoIP Security Podcast #75, a 38-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 17MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #74: 2008 Crystal Ball Edition, Asterisk and Trixbox vulnerabilities, top 10 lists, VoIP security trends for 2008 and more….

Synopsis: Blue Box #74: 2008 Crystal Ball Edition, Asterisk and Trixbox vulnerabilities, top 10 lists, VoIP security trends for 2008 and more….


Welcome to Blue Box: The VoIP Security Podcast #74, a 44-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 20MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box #73: SIP security issues at IETF 70, Skype security, vulnerabilities in Cisco and Nokia phones, Vietnam’s cyberdissidents, VoIP security news, listener comments and more…

Synopsis: Blue Box #73: SIP security issues at IETF 70, Skype security, vulnerabilities in Cisco and Nokia phones, Vietnam’s cyberdissidents, VoIP security news, listener comments and more…


Welcome to Blue Box: The VoIP Security Podcast #73, a 44-minute podcast  from Dan York and Jonathan Zar covering VoIP security news, comments and opinions.   

Download the show here (MP3, 20MB) or subscribe to the RSS feed to download the show automatically. 

You may also listen to this podcast right now:

NOTE: This show was recorded on December 11, 2007.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there. 

Thank you for listening and please do let us know what you think of the show.

Blue Box SE#022 – SIP NAT Traversal discussion with Jonathan Rosenberg

Synopsis: Interview about SIP NAT Traversal with Dr. Jonathan Rosenberg, Cisco Fellow and author of many RFCs and Internet-Drafts related to SIP for the Internet Engineering Task Force (IETF).


Welcome to Blue Box: The VoIP Security Podcast Special Edition #20, a 25-minute interview with Dr. Jonathan Rosenberg about SIP and NAT Traversal.  Recorded at Interop New York in October 2007.

Download the show here (MP3, 13MB) or subscribe to the RSS feed to download the show automatically.

You may also listen to this podcast right now:


Show Content:

In this Special Edition, I sat down with Dr. Jonathan Roseberg at Interop New York in October 2007 to talk about SIP NAT Traversal. Jonathan, a Cisco Fellow, has authored many RFCs related to SIP for the Internet Engineering Task Force (IETF) and in fact was a co-author of RFC 3261, the original specification for the SIP protocol.  He is also the author of "The Hitchhiker’s Guide to SIP", a document that aims to help people find their way through all the many documents that today make up what we call "SIP".

For the past few years, Jonathan has been extremely involved in the whole issue of SIP and NAT traversal and has authored several of the major Internet-Drafts on the issue.  In this interview, we discuss:

  • What the issue is with SIP and NAT traversal
  • How ALGs and SBCs attempt to solve the problem
  • Methods that have been developed by the IETF, specifically:
    • STUN
    • TURN
    • ICE
  • The role of ICE going forward, who is supporting it, etc.

I believe you will find it a very educational session and very helpful in understanding this major issue with regard to SIP.  We thank Jonathan Rosenberg for his time.

If you enjoy this show, we would also suggest you go back and listen to Blue Box Special Edition #20, our interview with Cullen Jennings about SIP security.  The two shows complement each other extremely well and provide a solid understanding of the current state of SIP security.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at either +1-415-830-5439 or via SIP to ‘bluebox@voipuser.org‘ to leave a comment there.

Thank you for listening and please do let us know what you think of the show.