Build a Better VPN With OpenVPN and DD-WRT
Two VPNs in OneVPN connections let you remotely access file or connect remote offices together via secure tunnels over the Internet. They can even come in handy to secure connections on public Internet ports or Wi-Fi hotspots, hiding Internet traffic from local eavesdroppers.
If you aren't going to have more than two-dozen VPN users, you might consider setting up your own VPN server using the DD-WRT router firmware. If you have a compatible wireless router, you can load the firmware on it. This gives you an OpenVPN server and client, and many more cool features. You can then set it up for remote access connections or site-to-site connections to connect offices together.
DD-WRT supports two different VPN protocols: Point-to-Point Tunneling Protocol (PPTP), which is very popular but has vulnerabilities, and OpenVPN, which uses Secure Sockets Layer (SSL) and Transport Layer Security (TLS) for a much more secure solution. In this two-part tutorial, we will set up and use OpenVPN.
In this first of two articles, we will explain how to flash the router with the DD-WRT firmware, change the router's IP and subnet for compatibly reasons, and create the SSL certificates. In the second installment, we will step through configuring the OpenVPN server, creating startup and firewall scripts, configuring the clients, and testing it out.
For the record, this tutorial was based off using the VPN variant of DD-WRT v24-SP2. It's the build 13064, dated 10/10/09. For creating SSL certificates and for the clients, we used...
Read the rest of this OpenVPN howto at Serverwatch.com
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