Step 5: Configure Additional Settings
To better adapt your DD-WRT powered router for hotspot use, you should think about making these changes:
- Enable Info Site Password Protection: By default, a page showing status details of the router is displayed (Figure 7) without requiring a password, when a user accesses the router's admin IP address. Although, the information isnt particularly sensitive, you should prevent public access to it. Go to the Management settings on the Administration tab and refer to the Web Access section.
Figure 7: Example of the Info Site page in DD-WRT.
- Filter SMTP traffic: To prevent users from sending SPAM using your Internet connection, you can block SMTP traffic. Refer to the Blocked Services section on the Access Restrictions tab. Depending on the solution you use, this can also generally be set using your hotspot management settings.
- Enable AP Isolation: Prevents communication (i.e. file sharing) between the hotspot users which helps secure users that forget to disable sharing. Go to the Advanced Settings on the Wireless tab.
- Configure QoS: To control the bandwidth each person uses on the hotspot you can configure QoS. Go to the QoS Settings section of the QoS subtab of the NAT/QoS tab. Depending on the solution you use, you may also be able to control this with your hotspot management settings.
In this article, we discussed how you can take advantage of the open-source community when it comes to setting up a Wi-Fi hotspot. You can use third-party firmware on simple off-the-shelf routers, instead of buying a commercial hotspot gateway. Although requiring some extra time and a bit more risk, our solution saves hundreds of dollars.
Among the three general firmware solutions discussed, DD-WRT is most likely the best bet for open source and Linux beginners. In addition, it is intergrated with the most popular open source hotspot solutions.
Have fun with your new hotspot!