Fedora 7 區網電腦共享頻寬設定問題 - Linux

各位大大好,小弟是Linux超新手
照著手邊的書(Fedora 7 Linux應用實務)操作,
在讓"區域網路內的電腦共享頻寬上網"這邊卡住了

網路架構圖
http://ppt.cc/rTMK


目前的情形是 linux主機可以上網,win 7 可以ping 到linux的
eth0 (192.168.1.1),也可以用telnet 192.168.1.1 連到linux主機,
可是win 7就是無法上網..

目前有檢查 ntsysv iptables的服務有開啟

請問有什麼服務未開啟或是那邊我做錯了?請板上大大幫忙解答


/etc/rc.d/rc.local 檔內容如下
==============================================
echo "1" > /proc/sys/net/ipv4/ip_forward
modprobe ip_tables
modprobe ip_nat_ftp
modprobe ip_nat_irc

modprobe ip_conntrack
modprobe ip_conntrack_ftp
modprobe ip_conntrack_irc
ifconfig eth0 192.168.1.1 netmask 255.255.255.0

iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j MASQUERADE
==================================================

ifconfig 後的內容如下
===================================================
eth0 Link encap:Ethernet HWaddr 00:50:BA:AD:10:20
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::250:baff:fead:1020/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:728 errors:0 dropped:0 overruns:0 frame:0
TX packets:688 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:51089 (49.8 KiB) TX bytes:70354 (68.7 KiB)
Interrupt:20 Base address:0x4000

eth1 Link encap:Ethernet HWaddr 00:1A:4D:98:17:8D
inet addr:121.254.72.96 Bcast:255.255.255.255 Mask:255.255.252.0
inet6 addr: fe80::21a:4dff:fe98:178d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2630 errors:0 dropped:0 overruns:0 frame:0
TX packets:1249 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1045820 (1021.3 KiB) TX bytes:368864 (360.2 KiB)
Interrupt:19 Base address:0xe000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:560 (560.0 b) TX bytes:560 (560.0 b)
=====================================================================

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