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Online VoIP Services Fun
By Brian Wilson

Ok we all have heard of Vonage and the other VoIP providers that will give you unlimited Phone services over your broadband connection having your regular old phone. But there are other services that are similar but have a few extra fun options. Let’s cover one of the services I have started playing with voipbuster dot com. Now for legitimate use it is a very good provider and I have enjoyed calling friends all over the world. Now time to cover the dark side to online VoIP providers. One think to think about is where is the provider located (what country). This is important because there are different laws for different countries and if you use the service to harass people (which is really lame) you could find yourself in real trouble. The kind of fun I am talking about is Spoofing Caller ID and also call bridging. This is nothing new but I just want to write a quick paper on it to get the word out. I was informed of VoIPbuster dot com from a friend of mine so a lot of the credit for this paper needs to go out to Toxic from csthis dot com. Now that I have given credit to the person that spiked my interest with this kind of VoIP Phrecking I can get down to business.

Direct or Call Bridging is the act of connecting two PSTN numbers from a 3rd party. Basically this function allows you to use software to call friends by having the VoIP service call your PSTN number 1st and after the call on your phone goes off hook it will auto dial the remote end PSTN number. Since both land line phones where called neither one of the landline phones will be billed for the call. The cool thing is that called ID is sent in both directions from the numbers called so your phone is ringing with your remote numbers caller ID, when you pick the line up the other end starts ringing and they see your caller ID so there is no trace of the 3rd party connection other than the 1st line getting a auto ringing when it goes off hook to the remote line. This service used legitimately is very useful and cool. But if you decide to use this for fun then you can force anyone to call anyone else and they will have no idea what is happening. To the end caller it looks like they are getting called from the other line. This is fun to do when you are around to see their faces of the people you are forcing to call each other.

Now for the dark side if you call someone’s cell phone and keep them online and call it again while spoofing your called ID number to match there cell phone number it should force you into voicemail. The trick here is that some cell providers do not set passwords to voicemail if it is called from it’s own number (even if you are prompted for a password a lot of systems have default passwords that never get changed). Other fun things to do with caller ID are spoofing you outbound ID to show something funny (like “BellSouth”). The idea here is that the sky is the limit since the PSTN is permanently hooked to the internet. I am sure we will see a lot of hacks coming to exploit the fact the internet and phone infrastructure are now merging.

Spoofing Phone Cards is another trick you can use to have fun. Again there are legitimate reasons to have this kind of card. Perhaps you need to call someone to give them an anonymous tip but wanted to make sure you call was not traced (the card provider could still release the call logs to law enforcement). One of the more popular Spoofing card providers is spoofcard dot com. Now with the different spoofing card providers they offer different features like: the ability to change what someone sees on their caller ID display when they receive a phone call, make calls truly private, ability to record calls, web based control panels, and ability to change your voice on the call.

Sniffing VoIP calls is another trick that can be done. Now there are few good reasons for Sniffing VoIP calls like to trouble shoot VoIP routing issues or to record you own calls. Now there is also many bad thing that can come out of sniffing VoIP like the fact if you are on a open WiFi AP other can be recoding your calls and even rerouting them. There are many kinds of sniffer out on the internet free but the only one I trust and endorse would have to be Cain & Able from oxid.it. With Cain & Able you can do a lot of different kinds of Sniffing to include capturing of Passwords, RPD sessions, SSH, Telnet, and VoIP calls. Cain can do a lot more than just that but I recommend going to there site to read more. As everything moves to the internet there will be many helpful advances in the way we live but keep in mind that with every new convenience there are risks associated with it.

Brian Wilson

CCNA, CSE, CCAI, MCP, Network+

Slimjim100@slimjim100.com

http://www.middlegeorgia.org

http://www.anti-hacker.info


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This artical covers some of the fun things you can do with web based VoIP providers.