Hiding traffic OpenVPN server
Due to the tightening Internet censorship around the world, governments are becoming more active and anxious to stop using VPN escape the restrictions imposed by them. China has been very strong in this area and using its "Great Firewall" can block VPN services from entering or leaving China. advanced and sophisticated firewalls use DPI or Deep Packet Inspection technology to find out the type of encryption used as OpenVPN SSL encryption. This problem can be solved in a number of ways, but all require knowledge of the configuration server side and some technical expertise. But if the user really wants to hide VPN traffic then he / she should contact the service provider for the implementation of a solution mentioned below:
Port Forwarding via OpenVPN TCP port 443
This is the easiest method that does not require server-side implementation and can be done easily from the end customer. OpenVPN uses TCP port 80 by default. firewalls so keep an eye on port 80 and other commonly used ports. If they detect any encrypted traffic using these ports, they reject traffic immediately. Port 443 is normally used by the HTTPS protocol to secure https: // sites. This port is commonly used all over the internet by gmail, facebook, twitter, banks and other important web services.
OpenVPN uses SSL encryption like HTTPS done and it is very difficult to locate on port 443. Block 443 can cripple the Internet, so it is not really a good option for censors Web to block this port. In traditional client OpenVPN, the port forwarding is a familiar element. Changing the port to port number 443 is very easy. The VPN provider should be contacted to have the services of such a client.
Obfsproxy
This tool encapsulates data into an obscuring layer which makes it difficult for web-censors to find out what protocol (OpenVPN or other) is used. This tool was recently constituted by the Tor network because China has limited users to access Tor nodes. This tool can be set up to OpenVPN. To work, the VPN server and the client computer must have obfsproxy installed on them. Obfsproxy is easier to configure and set up other tunneling techniques.
OpenVPN via the SSL tunnel
An alternative to OpenVPN tunnel is SSL, or Secure Socket Layer. Many proxy servers use this to secure their connections. It is also applied to hide the use of OpenVPN protocol. OpenVPN uses a protocol called TLS / SSL for encryption is different from the normal SSL. DPIs can detect sophisticated. To avoid this, OpenVPN data can be wrapped within an additional layer of encryption. DPIs can not violate the outer layer of SSL and OpenVPN cipher suite is hidden inside. multi-platform stunnel software is used for the manufacture SSL tunneling. The software must be installed and configured on both the client computer and the server. Therefore, for any user to use this technique, it is essential to discuss the issue with the VPN provider and get their share configuration guides.
0 Komentar