OpenBSD adJ como enrutador y cortafuegos

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Un computador que se usará como cortafuegos tiene dos interfaces de red Ethernet ---como debe ser en todo cortafuegos--, al listarlas con ifconfig aparece:

rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:40:f4:ee:a9:24
        priority: 0
        groups: egress
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 120.136.228.42 netmask 0xffffff00 broadcast 120.136.228.255
        inet6 fe80::241:f4ff:feee:a923%rl0 prefixlen 64 scopeid 0x1
nfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:24:22:24:00:ab
        priority: 0
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 192.168.117.39 netmask 0xffffff00 broadcast 192.168.117.255
        inet6 fe80::234:21ff:fe24:ab%nfe0 prefixlen 64 scopeid 0x2
 

1. Cual es la IP asignada a la interfaz de red nfe0 ?

2. Se necesita cambiar esa IP de manera permanente por la IP 192.168.187.1, describa en detalles los pasos que debe seguir para hacerlo desde un interprete de comandos (preferiblemente usando el editor vim).

Si esta tarea resulta muy compleja para su caso lo invitamos a cursar primero "Interprete de comandos y Unix," (se dió una versión gratuita en Abril de 2011 http://archive.p2pu.org/general/inteprete-de-comandos-y-unix  y una presencial retribuida en Julio de 2011 http://www.pasosdeJesus.org/?pag=m3) y consultar la sección 4.2 de la documentación para servidor de adJ http://structio.sourceforge.net/guias/servidor_OpenBSD/lan-ethernet.html#configuracion-interfaz.  


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