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Debian GNU/Linux Reference Guide
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8.6.29 Probando la red

Instale netkit-ping, traceroute, dnsutils, ipchains (para el kernel 2.2), iptables (para el kernel 2.4 ) y el paquete net-tools:

     $ ping yahoo.com # verificar la conexi�n a Internet
     $ traceroute yahoo.com      # rastrear paquetes IP
     $ ifconfig                  # verificar la configuraci�n del 
                                 # anfitri�n (host)
     $ route -n                  # verificar la configuraci�n de la ruta
     $ dig [@dns-server.com] host.dom [{a|mx|any}] |less
           # verificar registros host.dom DNS [@ dns-server.com] para  
           # un registro {a|mx|any}
     $ ichains  -L -n |less      # verificar filtrado de paquetes (kernel 2.2)
     $ iptables -L -n |less      # verificar filtrado de paquetes (kernel 2.4)
     $ netstat -a                # mostrar todos los puertos abiertos
     $ netstat -l --inet         # mostrar los puertos en escucha
     $ netstat -ln --tcp         # mostrar puertos tcp en escucha (num�rico)

Debian GNU/Linux Reference Guide
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