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SNAT pentru IP dinamic (conexiune PPPoE sau DHCP)

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SNAT pentru IP dinamic folosind iptables

#!/bin/sh
WANIF="ppp0"
LANIF="eth0"
INTERNALNET="192.168.0.0/24"
IFCONFIG=/sbin/ifconfig
IPTABLES=/usr/sbin/iptables
GREP=/bin/grep
AWK=/bin/awk

# Determinam adresa IP externa automat:
WANIP="`$IFCONFIG $WANIF | $GREP 'inet addr' | $AWK '{print $2}' | sed -e 's/.*://'`"

# Se face SNAT la toate IP-urile din reteaua locala prin IP-ul extern
$IPTABLES -t nat -A POSTROUTING -s $INTERNALNET -j SNAT --to $WANIP

#END


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