The Linksys WRT54GL is notable as one of few consumer-level routers having its Linux based firmware source code released to satisfy the obligations of the GNU GPL. This allows programmers to modify the firmware to change or add functionality to the device. Several third-party firmware projects provide the public with enhanced firmware.

Version 1.1 CPU speed 1.1 125 MHz RAM 16 MB Flash memory 4MB S/N Prefix [1] SL7B

Fully supported by Tomato, openwrt, and DD-WRT.

Standard features

• All-in-one Internet-sharing Router, 4-port Switch, and 54Mbps Wireless-G (802.11g) Access Point
• Shares a single Internet connection and other resources with Ethernet wired and Wireless-G and -B devices
• Push button setup feature makes wireless configuration secure and simple
• High security: TKIP and AES encryption, wireless MAC address filtering, powerful SPI firewall

Few of many additional features of DD-WRT modifyied router

• DNSMasq for DHCP and DNS.

Wireless:

• Control of TX power!: Range: 0 - 251mW (Default: 70 )
• Network Modes: Client, Repeater, Repeater Bridge, Adhoc
• Radius (Remote Authentication Dial-In Service)
• WDS (Wireless Distribution System), WDS AP
• Security Modes: WPA2 Enterprise, WPA2 Personal Mixed, WPA2 Enterprise Mixed