I have a WRT54G v4 and somehow I had noticed I upgraded to 4.30.5. When I went to web to see if I still ahd latest it said 4.21.1 was latest. So, I quickly re-flashed with 4.21.1. I went into the 4.30.5 release notes (below) and it DOES say WRT54G. What's up ?
Linksys, A division of Cisco Systems, Inc.
Classification: Firmware Release History
Firmware Date: 04/27/2006
Release Date: 05/25/2006
Last Firmware Version: 4.30.5 __________________________________________________________________________ Firmware 4.30.5 - Resolves UPnP vulnerability reported by SANE
Firmware 4.30.2 - Resolves issue with filter name - Resolves issue where service name for PPPoE cannot be added - Resolves issue with detecting UHP modems - Resolves issue where DynDNS Custom and Static accounts cannot be used - Resolves issue with WEP passphrase not recognizing spaces
Firmware 4.20.7 - Resolved issue with SecureEasySetup button delay - Resolved issue with SecureEasySetup overwritting current wireless settings - Resolved issue with not being able to disable SecureEasySetup button - Resolved issue with Diag light being constantly lit after upgrading to 4.20.6 on v.1 hardware - Resolved issue with iDefense security vulnerability - Resolved issue with L2TP disconnect - Resolved issue with SecureEastsetup long button push not resetting wireless settings
Firmware 4.20.6 - Resolve issues with setup wizard - Updated wireless security menu - Resolve issues with port based QoS
Firmware 4.00.7 - Adds SecureEasySetup push button support - Resolves large file transfer issues - Resolves issue with enabling TKIP after enabling WEP - Updated QoS features - Resolves issues with multiple Access Restrictions policies - Resolves issue where multicast breaks when MAC filter status changes
Firmware 3.03.6 - Supports hardware version 3 - Updated help file
Firmware 3.03.1 - Wi-Fi certified
Firmware 3.01.3 - Updated wireless driver - Supports hardware version 2.2 (cannot downgrade to previous versions) - Resolves issue with VoIP adapters - Resolves issue with long domain names
Firmware 2.04.3 - Resolves issue with disabling firewall - Added QoS function - Added Port Triggering function - Added L2TP option for WAN connection type - Added ability to back up and restore configuration files - Added Wireless isolation function - Added ability to filter internal NAT redirection - Added ability to restrict access to web GUI from wireless clients - Added ability to filter IDENT port 113 - Resolves issue with HeartBeat WAN connection - Added support for 40/56bit cipher to support old browsers to use https - Resolves issue with PPTP passthrough - Changed WPA Group Key renewal time range to 600~7200 seconds - Added IGMP proxy support - Added ability to allow web GUI access only through https or http
Firmware 2.02.2 - Updated wireless driver to support all versions of WRT54G hardware - Adds support to allow WAP54G connect as a repeater - CTS protection mode set to disable by default to improve wireless performance in normal environments - Resolved issue where the WLAN LED stays on even when wireless is disabled - Resolved security vulnerability causing the web server in the router to crash
Firmware Version 1.42.2 - Updated wireless driver to 3.31.15 - Added URL and contents filters - Added L2TP passthrough - Added HeartBeat Signal support - Resolved issue with Connect on Demand
Firmware Version 1.41.2 - Updated GUI format and layout
Firmware Version 1.30.7 - Adds UI control to enable/disable frame bursting - Resolves issue with firmware upgrade error in Internet Explorer 6.0.2800.1106.xpsp2.030422-1633, on Windows XP pro. - Send 192.168.1.1 to disable DynDNS - Resolves issue with using the 4th tx key for WEP - Resolves issue with disconnecting PPPoE causing WPA to be disabled
Firmware Version 1.30.1 - Adjust PPTP max MTU value from 1400 to 1460 - The router is now certifiable for the UPnP logo - Complies with final 802.11g standard - Improved performance asymmetry between the transmit and receive paths - Receive Broadcast packets from renew state. Some DHCP server (Dlink 300G+) send broadcast ACK after it receives a REQUEST - Fix: The firmware upgrade will fail, if DDNS updates while upgrading - Fix: If first DNS address fails, the second or third DNS address will be used to resolve domain names - Added the following items under Setup Page: - Router Name - Manual Time Server - MAC Clone - wireless domain - Security Settings - Added the following items under System Page - UPnP enable/disable - Ping Test and Traceroute - Added the following items under Wireless Page - CTS Protection Mode - Basic Rate - Added the following items under Status Page - Router Name - Start IP Address - End IP Address - Added Wi-Fi Protected Access(TM) support including AES and TKIP encryption - Resolves issue with Port Forwarding name showing up as garbage characters - Added "B-Only" option to wireless modes - Added "Default" option to Basic Rate settings
Firmware Version 1.02.1 - Incorporates updates found in the Draft IEEE 802.11g version 6.1 specification - Resolves interoperability issues with legacy 802.11b devices under Mixed Mode - Resolves a performance bug where the performance in a mixed b, g network did not go up once the last b client disassociated - Resolves issue where WEP degrades performance - Resolves issue with TZO DDNS Service - "Domain Name" replaces "name" - TFTP server will only verify image file name "xxxx.bin" - MAC Address Filter under the Advanced tab works on both wired and wireless clients - Fixed a bug that prevented wireless clients from connecting to the Internet if there was no active wired PC (PPoE customers in Europe and China only) - Support for UPnP enabled applications such as MSN Messenger - Fixed a bug that caused computers connected to the LAN ports to be dropped at some interval only to be immediately re-connected - Fixed Dynamic Routing issue between 2 Routers - Allows User to name Static Route Configurations - Modified PC List Web Page to avoid confusion - Stabilized Wireless-G to LAN and WAN Throughput - Stabilized Wireless-B to LAN and WAN Throughput - Improved LAN-WAN Throughput
Linksys released the 4.30 firmwares for the WRT54GL model which are compatible with the WRT54Gv1-v4.
I guess some people were confused to see WRT54GL on the web interface of the router although they had a WRT54G.
Thus they re-released the firmware for the WRT54Gv1-v4 with 4.21.* showing the correct model name.
You should be able to use either firmware for either router. If you check the release notes of 4.21.* and 4.30.* you'll notice that they basically have the identical history of changes. 4.30 is now a little bit more advanced if you look on the WRT54GL downloads page.