This was tried with TomatoUSB v1.28¹⁾ on a Netgear N300²⁾

The need to have a natting router came from that damn O2 Homebox 6641 which apparently does not allow switches connected to its ethernetport. Every time I connect more then one device (i.e. Linux Laptop, Mac Laptop, Linux Raspberry Pi) by a simple 1GB home-use HUB/Switch made by TPLink, all connections were interrupted until I rebooted that silly thing.

• Reset to factory
• In Basic→Network configure WAN
  • I chose to have a static IP
  • Configure connection to DSL-Router, using its subnet.
  • I left “Route Modem IP” to 0,0,0,0
• Same place (Basic→Network) configure LAN
  • Choose local (internal) IP of your NAT
  • Enable DHCP
  • Configure DHCP range
  • Leave lease time at 1440
  • Leave STP disabled
  • Choose your DSL-Routers' IP for first Static DNS
  • Port need not to be set, if default
• Same place (Basic→Network) configure Wireless
  • I just disabled it for using it as cable NATting device only
• Basic→IPv6
  • I set IPv6 Service Type to “disabled”
• Basic→Identification
  • Set parameters for routers own label, host- and domainname
• Advanced→DHCP/DNS
  • Enable Use internal DNS
  • Disable Use received DNS with user-entered DNS
  • Disable Announce IPv6 on LAN
• Advanced→VLAN
  • Leave VLAN 1:
    • VID: 1
    • Ports: 1-4
    • Default
    • Bridge: LAN(br0)
  • Leave VLAN 2:
    • VID: 2
    • Ports: WAN
    • Bridge: WAN
  • Wireless
    • Leave Bridge eth1 to at “LAN(br0”
• Adminsitration→Admin Access
  • Disable telnet
  • Enter your SSH public key
  • Disable SSH access by password
  • Set your own (non-default) password for web-access

/usr/sbin/robocfg showports
/usr/sbin/robocfg port 4 media 100FD

• http://www.linksysinfo.org/index.php?categories/firmware-projects-for-linksys-devices.20/
• Shibby's Pages (Changelog)