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Debian GNU/Linux Reference Guide
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10.2.4 Netfilter Kommandos

Die grundlegenden Kommandos von iptables sind:

     iptables -N Kette        # erzeuge eine Kette
     iptables -A Kette \      # f�ge Regel zur Kette hinzu
      -t Tabelle \            # verwende Tabelle (filter, nat, mangle)
      -p Protokoll \          # tcp, udp, icmp oder all
      -s Quelladresse[/Maske] \
      --sport Port[:Port] \   # Quellport, falls -p tcp oder udp ist
      -d Zieladresse[/Maske] \
      --dport Port[:Port] \   # Zielport, falls -p tcp oder udp ist
      -j Ziel \               # was tun, wenn es passt
      -i in-interface-name \  # f�r INPUT,  FORWARD, PREROUTING
      -o out-interface-name   # f�r FORWARD, OUTPUT, POSTROUTING

Debian GNU/Linux Reference Guide
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