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# Cause all hosts on the 192.168.100/24 network to be masqueraded.
ipfwadm -F -p deny
ipfwadm -F -a m -S 192.168.100.0/24 -D 0.0.0.0/0
¼ÓÈë¶ÔÆäËüЭÒéµÄÖ§³Ö£¬ÀýÈ磺
modprobe ip_masq_ftp
modprobe ip_masq_raudio
modprobe ip_masq_irc
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1¡¢È·¶¨kernelÖ§³ÖIP Masquerade£¬È±Ê¡Çé¿öÏÂslackware3.5ºÍredhat5.1¶¼Ö§³Ö¡£
CONFIG_EXPERIMENTAL
CONFIG_NET
CONFIG_FIREWALL
CONFIG_INET
CONFIG_IP_FORWARD
CONFIG_IP_FIREWALL

CONFIG_IP_MASQUERADE
CONFIG_IP_ALWAYS_DEFRAG
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3¡¢ÔÚÅäÖÃǰlinux»úÆ÷Ó¦¸ÃÄܹ»ping ͨ¾ÖÓòÍøºÍINTERNET¡£
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route add -net 192.168.100.0 netmask 255.255.255.0 eth0
route add default ppp0
4¡¢ipfwadmÖÐ24Ϊnetmask¶ÔÓ¦Êý×Ö£¬¾ßÌåÈçÏ£º
netmask | x | Subnet
~~~~~~~~~~~~ |~ ~ |~~~~~~~~~~~~~~~
255.0.0.0 | 8 | Class A
255.255.0.0 | 16 | Class B
255.255.255.0 | 24 | Class C
255.255.255.255 | 32 | µ¥»ú
5¡¢¾ÖÓòÍøÖÐÆäËü»úÆ÷TCP/IP µÄgateway Ó¦ÉèΪlinux»úÆ÷µÄIPµØÖ·£¬DNS
Server¿ÉÉèΪÈÎÒâ¿ÉÓà DNS serverµÄµØÖ·£¬Èç 202.96.0.133 µÈ¡£
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