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ÎÒÊÔÓùýÒÔϹæÔò¶¼²»ÄÜͨ¹ý:
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$ipt -A INPUT -s 192.168.0.101 -p udp -j ACCEPT
$ipt -A INPUT -p gre -j ACCEPT
$ipt -A INPUT -p tcp --dport 1723 -j ACCEPT
$ipt -A INPUT -p tcp --sport 1723 -j ACCEPT
$ipt -t nat -A POSTROUTING -p tcp -o eth1 -j SNAT --to 192.168.0.101:1723
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