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Debian GNU/Linux Reference Guide
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8.6.29 Testare la rete: le basi

Installate i pacchetti netkit-ping, traceroute, dnsutils, ipchains (per Kernel 2.2), iptables (per Kernel 2.4), e net-tools e:

     $ ping yahoo.com            # prova la connessione internet
     $ traceroute yahoo.com      # traccia i pacchetti IP
     $ ifconfig                  # prova la configurazione dell'host
     $ route -n                  # prova la configurazione di routing
     $ dig [@dns-server.com] host.dom [{a|mx|any}] |less
           # controlla i record DNS di host.dom tramite dns-server.com 
           # per {mx|any} record
     $ ipchains  -L -n |less     # controlla il packet filter (kernel 2.2)
     $ iptables -L -n |less      # controlla il packet filter (kernel 2.4)
     $ netstat -a                # scopre tutte le porte aperte
     $ netstat -l --inet         # trova le porte in ascolto
     $ netstat -ln --tcp         # trova le porte tcp in ascolto (numerico)

Debian GNU/Linux Reference Guide
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