SafeVPN.net introduces a completely new product that will allow to significantly reduce traffic usage for a VPN connection that is used to run VoIP traffic. We were already introducing bandwidth optimization for VoIP VPN accounts, also known as “SBO” which was doing voice codec and transport protocol optimizations to reduce traffic usage, however these manipulations were affecting voice quality and some line monitoring parameters, like post dial delay (PDD).
The new service does not alter voice traffic itself so it’s being delivered “as is” to the client side. All traffic manipulations are being done at a transport level of VPN protocol. It is based on well known OpenVPN with our modifications made to the code.
The main difference of our new service from so called ‘SBO’ is that the service provided with VPN security, which is missing in SBO services. All traffic is encrypted and tunnelled, which makes impossible for 3rd parties to observe it.
The other important benefit of VoIP Traffic Saver is deep packet inspection (DPI) protection. Several countries are affected by constant VoIP business disruptions caused by internet service providers using DPI hardware equipment. VoIP Traffic Saver mangles encrypted traffic, randomly changes packet sizes, so it will look like a raw stream of random UDP traffic on DPI equipment. The VPN will stealthily establish a connection so the DPI equipment won’t be able to catch the protocol marks or labels. This will reduce possibilities to interrupt VoIP communication business by unauthorized third parties.
With our new service users can run around 64 voice channels on g.729 codec with only 512 kbps. We made tests on 5 Mbit voice stream (around 600 channel simultaneously) and the service is running flawlessly.
UPDATE 2015/07/11: VPN with VoIP traffic saver now works on DD-WRT routers!
SafeVPN.net now offering internet line load balancing for VoIP VPN accounts. This new kind of setup will allow to share two or more internet connections on one PC to run VPN. Currently we offer only PC-based solution, router-based installations aren’t supported, but we are working on implementation.
In order to get the service running each internet connection should be set on different subnet (for example, the router for connection 1 will run on 192.168.10.1/24, so the router for connection 2 should run on any different subnet, like 192.168.20.1/24). Both routers should be accessible on the LAN to which the PC connected.
For setting up load balancing service we’ll need login that PC remotely and make remote installation. Since it requires manual operation, we charge remote setup fee. The price for installation may be different and depends on the operating system running on the PC. Do not hesitate to contact us to get a quote.
SafeVPN.net is now offering VoIP VPN configuration files for DD-WRT routers. Bear in mind that not every DD-WRT router has OpenVPN client, which is necessary for running VoIP VPN account. We can recommend following routers that have firmware with OpenVPN support:
- Linksys E-series models.
- Asus RT-N10 and RT-N16, some WL-series models.
There is always a possibility to check if router model is listed in DD-WRT router database. There should be a firmware with vpn, openvpn, big or mega tags, otherwise it may not support OpenVPN. We do not recommend to choose routers with CPU frequency less than 400 MHz. CPU power is needed to provide encryption with no latency, otherwise it may decrease voice quality and number of voice channels forwarded at the same time.
Do not hesitate to contact us if you have any questions.
We had two reports recently that customers lost money from their SIM cards connected with our service on public IPs. Further investigation of one case showed that customer was using simple passwords on the devices. In device security settings they also had no any restriction for incoming calls from internet. With this scenario, anyone who scans IPs will get a reply on some VoIP port and http port from the device. After that they can try to send call there or guess the password and login to web interface to check device settings and allow calls from anywhere, so they could send calls then. To avoid such cases please do the following:
- use secure password for your device;
- restrict calls to accept them only from your SIP trunk IP or VoIP switch IP;
- in case you can’t restrict calls by IP, choose our bandwidth optimization service and ask to set your devices on private IP range. You will still be able to access devices remotely by accessing your Linux PC desktop with VNC or similar program and then accessing your devices from there.
Performing these simple steps will avoid money loss on your GSM/PSTN carriers.
Please note that VPN with public IP considers that anyone from internet can access your IP. Many special programs do automated port scans over internet to gather information about IP address. Please consider your security and never use easy to guess passwords on any services that you put on public IP. Also check security settings and hide everything that you don’t wish to be available publicly.
This article is about the old service. We introduced the new service which we offer instead of the one described in the article below.
We are pleasd to announce bandwidth optimization services for VoIP VPN accounts.
The service is addon for VPN account to optimize traffic usage.
How it works?
SafeVPN.net offers VPN routers capable to run VoIP VPN accounts. We made a custom build of OpenWRT firmware for Asus RT-N16 router which will allow operation of the account. It will allow you to run both, OpenVPN and IPIP VoIP VPN accounts.
SafeVPN.net provides VPN accounts for VoIP traffic tunnelling. This account is usually needed for VoIP termination and forwarding of VoIP traffic between VoIP server and regular or mobile lines over the VPN. It allows to assign VPN IP directly on the device. You DO NOT need this account if you wish to run VoIP applications on your PC – our generic VPN accounts allow VoIP traffic.