Questions tagged [voip]

Question 1

I have dedicated a VOIP number for 2fa use. What are some reasons why it would be safer or less safe than using a cell phone? I am using a number from didforsale.com. They forward all SMS messages to ...

Question 2

I have enabled a function in my mobile phone, that uses my home Wi-Fi network to make calls when the cellular signal does not exist. As far as I know, the cellphone provider charges me as though I ...

Question 3

Regarding voice over IP, I'm trying to understand how vulnerable it is to someone intercepting one or both sides of the audio. Logically, it seems like there are 3 "legs" to each ...

Question 4

Say, you call Wells Fargo's or Fidelity's customer support number, from Skype. Example number: 1-800-869-3557 You use Skype because you're overseas and because Skype lets you call US numbers for free. ...

Question 5

Is it possible that SIP tools like sipvicious and other SIP tools work on SIP-TLS networks where all of the devices (IP-Phones) have a certificate verify feature?

Question 6

Can my ISP see the difference between sending messages, making video call, and simply engaging with communities - building on traffic types?

Question 7

Our organization uses a Voip "push to talk" type app on Android and IOS devices. The application connects to a server on premises through the internet. To use the app, the user is assigned ...

Question 8

I'm developing some sort of VoIP application for mobile devices for fun. I initially planned to rely on P2P connections only. I didn't want to use a relay server because I thought (1.) there would ...

Question 9

I was wondering how hackers were able to gain remote access to one's android device with the help of just a .PNG file. This vulnerability was announced by Google but they didn't provide much ...

Question 10

I need to demonstrate RTP bleed on an older version of Asterisk/RTPProxy, but I'm struggling with setting up the environment. Can somebody please tell me how to configure a proxy and two clients ...

Question 11

My firewall reports outgoing connection attempts via com.apple.WebKit.Networking to a number of STUN servers (namely, stun.nas.net, stun.node4.co.uk, stun.voxox.com and stun.wwdl.net). This is ...

Question 12

Many critics say that current key lengths for SRTP-encryption in popular phone apps like Linphone or CSipSimple are not sufficient anymore. What should be a recommended key length nowadays?

Question 13

Is it possible our VoIP calls being redirected from our intended phone number to another phone number unknown to us? Our VoIP number is currently forwarded to mobile phones and computer phones. ...

Question 14

I have the following setup: PBX Server -> Internet -> LAN -> IP Phone -> Workstation (PC) Which means that my computer is connected to the LAN, through a Dual Ethernet card on the IP ...

Question 15

I run my own (Ubuntu based) router and have iptables configured to drop all incoming packets by default. To my surprise, running an nmap scan (from the WAN side) shows two open ports related to VOIP: ...

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Questions tagged [voip]

Is using a VOIP number for 2fa safer or less safe than using a cell number?

Are phone calls via WiFi VOIP encrypted by A5/1, A5/2, and A5/3?

VOIP call encryption

Is it safe to call banks from Skype?

Penetration Testing on SIP-TLS Network?

Does my ISP have a clue about what type of activity I'm doing on WhatsApp/Viber/Telegram?

Trying to determine if our application login constitutes 2FA

Privacy in P2P vs relayed connections for VoIP

How is malicious code executed on android devices without owners' knowledge?

How to reproduce the RTP bleed vulnerability?

Is it advisable to accept STUN server connections?

VoIP/SIP Secured Real Time Protocol (SRTP): Which key length is appropriate nowadays?

Possibility of business calls/leads being professionally stolen? [closed]

Sniffing devices in a serial topology

Connection to ports 2000 and 5060 successful despite filtering

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