In adition to the standard NVRAM configuration options, my firmware modifications add a few more options which can be set using the nvram utility on the WRT54G command line (but don't forget to invoke "nvram commit" before rebooting)
- dnsmasq_enable: enable/disable dns masquerading proxy
- httpd_enable: enable plaintext HTTP
- httpsd_enable: enable SSL-encrypted HTTP
- syslogd_enable: enable syslogd
- telnetd_enable: enable telnet daemon
- dr_lan_rx: listen to RIP on the LAN interface
- dr_lan_tx: send RIP on the LAN interface
- dr_wan_rx: listen to RIP on the WAN interface
- dr_wan_tx: send RIP on the WAN interface
- filter=vpn: only allow VPN traffic to pass between LAN and WAN interfaces