DD-WRT is an open-source firmware designed for wireless routers and access points. It is a Linux-based open-source system that you can install and manage without paying anything. When you install DD-WRT on a Wi-Fi router, it will replace the firmware that the router came with.
For instance, a TP-Link router will be running the TP-Link firmware by default. You can, however, install a third-party firmware like DD-WRT for additional control and benefits. DD-WRT is a popular choice because of its reliability, feature set, and compatibility with a wider set of routers and access points.
DD-WRT had its initial release in 2005, and the project has been actively running for the past 20 years. It was first released for a Linksys router, but the list of supported routers has grown dramatically since then. At the time of writing, the DD-WRT firmware is available for thousands of Wi-Fi router models.
The name DD-WRT is an interesting combination. The first part, DD, refers to the German license plate letters for Dresden, the area where the development team used to reside. The second part, WRT, was taken from the model number of the Linksys router, WRT54G, which is believed to be a short form of wireless router.
I shall now take you through the significant features of DD-WRT firmware.
Support for multiple network modes is probably the best feature of the DD-WRT Firmware. This feature lets you use your Wi-Fi router in three modes, which are Access Point, Client Bridge, and Repeater. So, you can convert your Wi-Fi router into a Wi-Fi repeater, or a device that connects one network to another one.
Quality of Service settings are great when you want optimized performance from your network. DD-WRT will help you access these settings by limiting and prioritizing the bandwidth consumption of different apps and devices. DD-WRT also lets you set up these rules based on IP address and MAC address.
We still see many routers without support for network-wide VPN. By installing DD-WRT on your router, you can bring in native support for VPN. At the time of writing, DD-WRT works with VPN protocols like OpenVPN, PPTP, and L2TP.
DNS caching and forwarding are also great features in the DD-WRT firmware. DNS caching can speed up the website loading process, whereas DNS forwarding will always help you choose the correct DNS server for resolving queries.
You get an advanced network firewall from DD-WRT as well. This firewall is known for being better than the default one that you get on most routers. The Stateful Packet Inspection (SPI) firewall is great for analyzing the traffic and blocking the bad ones based on packets.
By the way, the actual list of DD-WRT features is quite lengthy. It includes options like Dynamic DNS, Wake-on-LAN, overclocking, transmission power control, SSH, Tor support, Universal Plug and Play (UPnP), RADIUS, multiple SSIDs, etc.
As I said earlier, you get an impressive set of features when you flash a router with DD-WRT. So, it becomes a better way to get these features than purchasing a brand-new Wi-Fi router with the said features. Provided that DD-WRT is compatible with older and newer Wi-Fi models, you can bring these additional features to a not-so-modern router as well. You would also appreciate the active development community behind the DD-WRT firmware. If you have an old router that supports Wi-Fi Extender mode, you can flash the DD-WRT firmware to bring that option to the router.
Because you get more control over different modules, DD-WRT firmware can help you improve the network performance to an extent. Something that I really love is power transmission control, which lets me adjust the processing/transmission power of the router, thus affecting the range. You will also benefit from the QoS features on the firmware. I also like DD-WRT for allowing the overclocking option, which can enhance the way you use the router’s processing power.
Your Wi-Fi router comes with a stock firmware that offers basic security features for a firewall and intrusion detection. But these can be insufficient for many purposes. But with DD-WRT firmware, you get an additional set of features such as enhanced firewall, VPN support, and network segmentation. Because it is an open-source project, you are likely to get faster updates without waiting for a long time. It is also future-proof in that there is native support for IPv6 and performance tracking.
While the additional features are appealing, most users rely on the DD-WRT for the customization/control it offers compared to other router firmware. It also helps that threat actors do not target this router firmware as much as they target others, such as TP-Link or NETGEAR firmware. So, you get to enjoy the type of control that router vendors will never give you, without serious concerns over security and vulnerabilities.
It also helps you find a super-active user community for the DD-WRT firmware. So, when you want to flash the firmware or fix some potential issues, you can find sufficient resources on the web. I believe this alone adds to the confidence you have to try things out.