Now, it becomes possible to use both interfaces simultaneously by sending the private traffic destined to the Cloud VPN inside the VPN tunnel and the public traffic (Internet traffic) over the other interface (outside the VPN tunnel). The VPN connection appears as a virtual network interface to the computer in addition to the existing LAN interface. Everything should work well by now.When a VPN connection is set up, an encrypted tunnel is created over the Internet to the Cloud VPN Region. Make sure stunnel is running and connect your openvpn. Restart stunnel application to reload the new configurations. Replace server_ip with your server public IP address. Edit the file and add the following content at the bottom of the file: Configuring stunnel on Windowsīy default config file is located at C:\Program Files (x86)\stunnel\config as. Currently only 32-bit version is privoded and this is the latest release by the time of writing this tutorial.
#Stunnel tomato install#
Install stunnel on Windowsĭownload and install latest Windows stunnel client. Install and configure stunnel on a Windows clientĮdit this file and add the following lins at the begining: route server_ip 255.255.255.255 net_gateway Your local stunnel will connect to remote stunnel on the server which routes received trsffic to oprnvpn service.Įxample: sudo openvpn -config client.ovpnĮverything should work well by now. Now you just connect to openvpn via its' config file and it will automatically route traffic via stunnel. Restart stunnel service sudo service stunnel4 restart Sudo iptables -A INPUT -p tcp -dport 1194 -j DROP To enable Stunnel service at startup edit /etc/default/stunnel4 file and change ENABLED=0 to ENABLED=1 Configuring firewall sudo iptables -A INPUT -p tcp -s localhost -dport 1194 -j ACCEPT stunnel.pem /etc/stunnelĬreate /etc/stunnel/nf file with the following content: Install stunnel sudo apt install stunnel4Ĭopy pem file from server installation to the client sudo cp. You should have a client.ovpn config file or something similar for connecting to openvpn server.Įdit this file and add the following lins at the begining: script-security 2
Install and configure stunnel on Linux client You can run the script stunnel.sh provided by this tutorial like: sudo bash stunnel.shĭownload stunnel.pem from your home directory after installation got completed. Install and configure stunnel on Linux server It is recommended to use port TCP 443 or TCP 587 to hide the traffic so far. In reality SSL/TLS traffic is short and intermittent so still it would be easy for a goverment/ISP to detect stunnel since lots of traffic will be passed as SSL/TLS. Install and configure stunnel on client.Install and configure stunnel on server.Supposing you already have installed openvpn over TCP 1194 on your server, then you need to hide the trafiic via stunnel and this tutorials will guide you trough the rest of procedures. You can find a simple tutorial for installing openvpn on a debian machine here. Since we need SSL/TLS handshake, if openvpn in the underlying protocol we need to use TCP protocol for openvpn.
ConceptĪs you see in the above diagram, trafic encapsulates as SSL/TLS by stunnel regradless of it's internal protocol.
Hiding openvpn traffic with stunnel so DPI firewalls are less likely to block your traffic.
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