Convirtiendo un Linksys WRT54G en repetidora y expansor de rango

Comenzando el año bien.

Como ya muchos lo saben, recientemente me cambié de casa. Existiendo una gran cercanía con mi oficina, decidí extender mi internet dedicado hasta mi casa (hehehe).

Suena fácil, y de hecho lo era: tender un cable sobre la casa del vecino no parecía tan mala idea, pero cuando tuve que tomar la desición si cablear nodos o intentarlo de manera inalámbrica, la verdad la hueva meter cable quedó como una remota segunda opción... viva el inalámbrico.

Hace algún tiempo viajé a comprar todo para nuestra red inalámbrica y entre tanto juguete había comprado unos expansores de rango (WRE54G) los cuales sinceramente, jamás logre echar a andar. Para esta ocasión no les miento si les invertí algo así como 5 o 6 horas a esas mugres sin resultados. Es una verdadera lástima ver que una compañía con tan buen renombre como Linksys haya vendido aparatos TAN MALOS (no soy el único en decirlo, esos expansores de rango no le han servido a CIENTOS en Internet, al checar foros había cientos de frustrados como yo).

Siendo entonces, que me batía a duelo con la frustración de no poder expander el rango (a mi casa llegaba "una rallita" de señal, queriendo decir con ello que a cada rato se me caía), leí varios comentarios de gente que estaba haciendo lo mismo que yo quería hacer con dos routers de Linksys (WRT54G) que son ampliamente usados y relativamente baratos. ¡Ah pos si yo tengo uno acá tirado!... corriendo decidí hacer el intento.

Aunque SI ES POSIBLE lograr la expansión de rango con el firmware original de Linksys, la verdad es que todos hablaban de las virtudes de utilizar firmware hackeado o customizado para dicha tarea. Yo sabía de la existencia de ellos, pero nunca me había animado a intentarlo (ni había tenido la necesidad de hacerlo).

Inge su... decidí arriesgarme (con todo y la advertencia de que PUEDES brickear el router si haces algo mal al flashearle el ROM del ruteador). Encontre una página muy buena para todo esto: http://www.wrtrouters.com y ahí encontré los diferentes tipos de "firmwares" existentes para estos routercitos... me decidí por uno de http://www.dd-wrt.com y proseguí a flashear el rom de mi router WRT54G.

Si alguien quiere, o necesita hacer algo similar, les dejo la guía que me resolvió todo el día.
Solo un consejo: antes de flashear a lo wey, chequen bien las diferentes versiones del router, ya que algunas tienen la memoria castrada, y los obligará a buscarle una versión "corta" del firmware. Así que no hagan nada SIN LEER los wikis o las descripciones de los firmwares.

Otro consejo: después de flashear el ROM, es necesario resetearlo... para ello es necesario desconectar el router, apretar el boton de reset, conectar el router, esperar 30 segundos (si treinta, no menos) y soltar el boton de reset. (apréndanselo como formulita)

A continuación la guía, (la dejé tal cual la encontré, en inglés) y sirve para routers WRT54G / WRT54GS / WRT54GL

Setup

  1. Save the configuration on both routers: Administration -> Backup. Click "Backup" button and follow prompts so save nvram backup files, i.e. nvram_host.bin, and nvram_client.bin. The configurations can be restored if the setup doesn't work out and you need to quickly get back to a different (working) configuration.
  2. Reset both routers to factory default settings so other settings will not have a possible conflict: Administration -> Factory Default - select yes - click "Save Settings" button.
  3. Give both the routers a different IP address, i.e. 192.168.1.1 (host/internet gateway) and 192.168.1.2 ("client router") on the same subnet. Setup -> Basic Setup
  4. Change the Internet Connection Type to Disable on the client router. Setup -> Basic Setup -> Internet Setup -> Internet Connection Type -> Disable
  5. Set the Gateway IP address of the client router to the LAN IP address of the host router. Setup -> Basic Setup -> Network Setup -> Router IP -> Gateway
  6. For each router, under Setup -> Basic Setup -- Network Address Server Settings (DHCP) -- Start IP Address, you may want to set different starting address for the different routers. For example host 192.168.1.1 starts DHCP at 100 and client 192.168.1.2 starts at 200. This will allow you to enable DHCP on both routers and know which router you are connecting to. This is helpful when connecting to your network with a wireless laptop so you know which router it is connecting to and for changing wireless power settings (both laptop and routers). Alternately, you can disable DHCP on the client router(s) and have only the gateway perform DHCP services.
  7. On the client router, under Setup -> Basic Setup -- Network Address Server Settings (DHCP) -- Static DNS 1,2,3 enter the DNS settings provided by your ISP. These can also be found from the host router under Status -> Router -- Internet.
  8. Turn off the firewall on the client router. Security -> Firewall -> Firewall Protection -> Disable
  9. Turn off security on both routers (this should already be done if you reset as above). Security can be re-enabled after all other steps are complete, but in order to minimize troubleshooting, it's best to get things setup with no security active. Wireless -> Wireless Security -> Security Mode -> Disabled
  10. Put both routers into AP mode and on the same channel. Wireless -> Basic Settings
  11. Under Wireless -> Basic Settings, set the SSID to your liking. For WPA WDS, the SSID for the routers needs to be the same. For WEP, different SSIDs can make troubleshooting easier.
  12. If you plan to use WPA later, then select G-only in Wireless -> Basic Settings. You cannot use B-only with WDS.
  13. Open WDS configuration on both routers. Wireless -> WDS
  14. On each router, you will see its wireless MAC address at the top of the Wireless -> WDS page. Put each router's MAC into the table of the other router, and select LAN for the type. Note that this MAC address is different from the one that may be printed on your case!
  15. There is no need to enable Lazy WDS or WDS subnet on either router.
  16. Test that you can ping the gateway from the client. Note that it may take a short amount of time for the WDS to be established, and you may need to reboot both the gateway and the client.
  17. Enable encryption now, if you like (highly recommended).

Notes

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