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Note: for advanced users only!
Acting wrongly may render your router completely useless ("brick it"). Furthermore, the installation of DD-WRT on your router, may void the manufacturer's warranty.
Contents of this page:
- 1. DD-WRT is not my first choice
- 2. Bandwidth limiting by QoS: rather (Fresh)Tomato than DD-WRT
- 3. Router database
- 4. More than just Broadcom WiFi
- 5. Installation takes an hour
- 6. Two versions needed
- 7. The 30-30-30 reset
- 8. The 18 installation steps
- 9. Upgrading an existing DD-WRT
- 10. Configuration
- 11. Tips for DD-WRT
- 12. Want more tips for improving your wireless internet?
DD-WRT is not my first choice1. Many routers are suitable for alternative firmware. In my experience, the best choice is Tomato or FreshTomato. With that, you have a tremendous lot of tweaking possibilities, much more so than with the standard firmware of your router.
Isn't there a Tomato / FreshTomato build available for your router? Then you might consider DD-WRT. DD-WRT is, in my experience at least, not as good as Tomato and its offspring (often less stable, more bugs, less reliable, less easy to install), so for me it's definitely second choice.
But still, it's an option, and your mileage may vary. Furthermore, my experience is probably outdated: my last intensive test of DD-WRT dates from 2011.
You can get DD-WRT here.
Note: the information on the website of DD-WRT is unclear and confusing. That's why I've written this page.
Bandwidth limiting by QoS: rather (Fresh)Tomato than DD-WRT2. When you want to limit your bandwidth per user, by means of QoS, then Tomato or FreshTomato is always the far better choice. Better than DD-WRT.
Especially on the matter of QoS, Tomato / FreshTomato is both technically better and much easier to set up.
Router database3. You can use the router database in order to check if your router is fit for DD-WRT.
More than just Broadcom WiFi chipsets4. A major advantage of DD-WRT is, that (unlike Tomato / FreshTomato) it supports more than just Broadcom-based routers. Besides routers with Broadcom WiFi chipsets, it also supports routers with e.g. Atheros WiFi chipsets.
Installation takes an hour5. The installation of DD-WRT is time consuming and takes many steps, but isn't hard to do. The only thing you need is precision. Do exactly what the how-to says, and don't skip anything! The whole job may last an hour.
Two versions needed6. For a first-time installation you need two versions of DD-WRT, namely the mini and the full version. This is because in most cases you can't directly install the full version, because of lack of storage space in the router.
Therefore, when first switching to DD-WRT, you need to install new firmware on the router twice. First the mini, and then from the mini the full version.
The 30-30-30 reset7. Another important aspect is the so-called 30-30-30 reset.
The 30-30-30 reset means that you keep the reset button on your router, pressed for at least 90 seconds. During those 90 seconds you perform several actions. More about that later.
Perform the 30-30-30 reset before and after each firmware change.
This is absolutely necessary for a faultless installation. Don't skip it!
It may be easier to do with assistance from someone else, because you need to keep the reset button pressed all the time.
Note: the following router models may suffer damage when performing a 30/30/30 reset:
- Linksys WRT54GS v1.1
- Linksys WRT54GS v2
- Linksys WRT54GS v2.1
The installation of DD-WRT goes as follows:
The 18 installation steps8. A. General cleanup and return to defaults
1. Turn on the router with the old firmware still in place. Use a (temporary?) ethernet cable to connect the computer that you wish to use for this operation, to the router. Wireless connections aren't suitable for this!
Also make sure that your wireless connection with the router is disabled. It's very important that you perform the operation by means of a wired connection, and also that there is no simultaneous wireless connection between your computer and the router.
2. Now press the reset button on the router and keep it pressed. Wait until at least 30 seconds have gone by. Don't release the reset button after that, but continue to keep it pressed!
3. Pull the power cord from the router. You still keep the reset button pressed, and you wait again for at least 30 seconds. Don't release the reset button after that, but continue to keep it pressed!
4. Connect the power cord again to the router, so that it powers up again. You still keep the reset button pressed, and you wait again for at least 30 seconds.
5. Release the reset button. Now you need to wait for at least five minutes, until the NVRAM has rebuilt itself. Simply wait! Continuing too early may brick your router.
6. Now perform a "hard reboot": pull the power cord from the router, wait a full minute and reconnect the power cord. Then wait at least three minutes.
7. In the configuration panel of your router, apply a "reset to factory defaults" (usually called that way).
At this point the firmware of your router has become completely clean and default: the NVRAM is entirely clean.
B. Install the mini version of DD-WRT
8. Check whether the operating system on your computer still has connection with the router. If not, re-establish the connection (Linux: click the icon of Network Manager in the system tray - click Auto eth0).
9. Now flash the router with the mini version of DD-WRT. That can be done from the configuration panel of your router; usually in the section Administration or Advanced, where it's usually called something like "Firmware Upgrade".
10. Repeat the 30-30-30 reset (step 2 to 4)
11. Release the reset button. Now you need to wait for at least five minutes, until the NVRAM has rebuilt itself. Simply wait! Continuing too early may brick your router.
12. Now perform a "hard reboot": pull the power cord from the router, wait a full minute and reconnect the power cord. Then wait at least three minutes.
C. Install the full version of DD-WRT
13. Check whether the operating system on your computer still has connection with the router. If not, re-establish the connection (Linux: click the icon of Network Manager in the system tray - click Auto eth0).
Emergency measure: establish connection by means of the terminal
Sometimes Network Manager can't connect normally to the router anymore, after replacing the firmware. In that case you can try the following:
a. Ignore Network Manager (if it's still trying to connect, click on Disable connection)
Use the terminal command ifconfig in order to find out how Linux calls your ethernet device (for example: enp4s0);
For an ethernet card called enp4s0, you type in the terminal (use copy/paste in order to avoid typo's):
sudo ifconfig enp4s0 192.168.1.104/24
Press Enter. Type your password when prompted; this'll remain entirely invisible, not even dots will show when you type it. That's normal.
Now you should be able to access the configuration window of the router in your web browser, on 192.168.1.1
14. Now flash the router with the full version of DD-WRT, from the mini. The configuration panel of your router is at 192.168.1.1 (type this in the navigation panel of your web browser and press Enter); then go to the section Administration - Firmware Upgrade.
15. Repeat the 30-30-30 reset (step 2 to 4)
16. Release the reset button. Now you need to wait for at least five minutes, until the NVRAM has rebuilt itself. Simply wait! Continuing too early may brick your router.
17. Now perform a "hard reboot": pull the power cord from the router, wait a full minute and reconnect the power cord. Then wait at least three minutes.
18. There is no next step. You're done!
Upgrading an existing DD-WRT9. When you already have DD-WRT on your router, you can skip the mini (part B of the instruction) and only apply part A and then C.
Configuration10. The configuration panel of DD-WRT is at 192.168.1.1 (type this in the navigation panel of your web browser and press Enter). The default user name is root and the default password is admin. You should change these right-away (don't use spaces in names and passwords).
Tips for DD-WRT11. a. Save settings changes correctly: after each and every settings change, first click Save and then Apply Settings. Only then will the new setting be stored and applied correctly.
Note: for certain settings changes a further measure is needed as well: Click tab Administration - click the button "Reboot Router" (at the bottom of the page).
Note: it may occur that after clicking "Apply Settings", your configuration panel seems to quit. When that happens, simply reload the page, or type 192.168.1.1 in the navigation panel of your web browser and press Enter.
b. Make sure that your wireless security is OK.
c. Don't overdo it: the optimal Tx Power is not that high. In fact, the ideal Tx Power is the lowest value that still provides an adequate signal for you. Both because of security and of your health. For example: in my case a value as low as 5, proved to be quite adequate.
d. Keep your router lively and fast: schedule an automatic reboot. As follows:
Administration - Keep Alive - Schedule Reboot.
Weekly is generally sufficient; I myself have scheduled my routers to reboot daily (at 03:00 AM).
Want more tips for improving your wireless internet?12. Do you want more tips and tweaks for your wireless internet? You might find these useful:
a. Amplify the wireless signal of your router
b. Apply a second router in your home
c. Reduce electromagnetic radiation of computing devices
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