/s.bin/i.ptables -A FORWARD -i eth1 -m st.ate --state ESTABLISHED,RELATED -j ACCEPT 汽车
/sbin/ip.tables ..-A FORWARD -i eth2 -m state --state ESTABLISHED,RELATED -j ACCEPT服务器
以上两句有何用途？
虽然我自己也搞了个IPT.ABLES的防火墙，但对IPTABLES的精髓还不了解。我自己做的那个防火墙有个比较.奇怪的现象，就是向外网转发时不时中断.……大概6~8个包又自动恢复正常了。情况就象下面这样： 汽车
C:\>ping .
www.21cn.com -t 外汇
Pinging
www.cdn.21cn...com [61.140.60.90] with 32 bytes o外贸
Reply from 61.140.60.90: bytes=32 ti.me=11ms TTL=.241学习
Reply from .61.140.60.90: byt.es=32 time=10ms TTL=241服务器
Reply from 61.140..60.90.: bytes=32 time=18ms TTL=241电影
Reply from 61..140.60.90:. bytes=32 time=17ms TTL=241健康
Reply from 61..140.60.90: bytes=32 time=17ms TT.L=241 鲜花
R.equest timed out. 鲜花
Repl.y from 61..140.60.90: bytes=32 time=9ms TTL=241--- 印刷
Reply from 61.140.60..90: bytes=32 .time=30ms TTL=241 乙肝
Repl.y from 61..140.60.90: bytes=32 time=10ms TTL=241 电子
Reply from 61.140.60.90: bytes=32 time.=23.ms TTL=241电脑
Reply fr.om 61.140.60.90: bytes=32 time=10ms TTL=2.41电影
Reply fro.m 61.140.60..90: bytes=32 time=11ms TTL=241.
Reply from 61.140.60.90: byte.s=32 time=.9ms TTL=241学习
Reply from 61.140.60.90: bytes=32 time=9.ms TTL=241..
Reply from 6.1.140.60.90: bytes=32 time=10m.s TTL=241 婚庆
Reply from 61.140.6.0.9.0: bytes=32 time=9ms TTL=241[成人用品]
Reply from 61..140.60.90: bytes=32 time=10ms TTL=2.41 婚庆
Reply from 61.140.6.0.90: bytes=32 time=1.0ms TTL=241--- 印刷
Reply fr.om 61.140.60.90: bytes=32 time=18ms. TTL=241.
Reply from 61.14..0.60.90: bytes=32 time=11ms TTL=241虚拟主机
Reply from 61.140.60.90: bytes=3.2 .time=10ms TTL=241( 游戏 )
Reply from 61.140.60.90: .bytes=32 time=18m.s TTL=241 健康
R.eply from 61.140.60.90: bytes=32 time=.19ms TTL=241.
Request timed out..电影
Reply from 61.140.60.90: bytes=32 time.=24ms. TTL=241.
Reply. from 61.140.60.90: bytes=.32 time=21ms TTL=241(广告)
Reply from 61.140.6.0.90: bytes=32 time=10ms .TTL=241.
R.eply f.rom 61.140.60.90: bytes=32 time=11ms TTL=241--- 印刷
Rep.ly from 61.140.60.90: bytes=32 t.ime=11ms TTL=241 杀毒
Reply from 61.140.6.0.90: bytes=32 time=11m.s TTL=241 乙肝
R.eply from 61.140.60.90: bytes=32 time=16ms TTL=2.41.
Reply from 61.140.60.90: bytes=32 ti.m.e=19ms TTL=241服务器
Reply from 61.140.60.90: byt.es=32 time=17ms TTL=2.41 健康
Reply. fr.om 61.140.60.90: bytes=32 time=11ms TTL=241--- 印刷
Reply from 61.140.60.90: .bytes=32 ti.me=9ms TTL=241 乙肝
Re.ply from 61.140.60..90: bytes=32 time=20ms TTL=241<性病>
Reply from 61.1.40.60.90: bytes=32 t.ime=19ms TTL=241.
Reply from 61...140.60.90: bytes=32 time=20ms TTL=241虚拟主机
Reply f.rom 61.140.60.90: .bytes=32 time=18ms TTL=241--------------彩票
R.equest timed out.域名
Request time.d out.电影
Reply from 61.140.6.0.90: bytes=32 time=11ms T.TL=241.
Reply from 61.1.40.60.90: byt.es=32 time=13ms TTL=241外贸
Reply from .61.140.60.90: bytes=32 time=.9ms TTL=241外贸
Reply .from 61.140.60.90: byte.s=32 time=23ms TTL=241 建材
Reply fro.m 61.140.60.90: bytes=32 .time=26ms TTL=241 外汇
Reply fro.m 61.140.60..90: bytes=32 time=13ms TTL=241 健康
Reply. from 61.140.60.90: bytes=32 time=10ms TTL=2.41.
Reply from 61.140..60.90: bytes=32 time=1.0ms TTL=241 乙肝
Reply from 61.140.60.90: b.y.tes=32 time=10ms TTL=241.
Repl.y from 61.140.60.90.: bytes=32 time=15ms TTL=241--------------彩票
Reply from 61.140.60..90: bytes=32 time=10ms T.TL=241--------------彩票
Reply from 61.140.60.90:. bytes=32 time=10ms .TTL=241<性病>
Request timed .out..
Request ti.med out. 乙肝
Req.uest timed out. 建材
Re.quest timed out.教育
Request timed .out.
R.equest timed out.服务器
Reply from .61.140.60.90: bytes=32 time=.23ms TTL=241 美容
Reply from 61.140.60.90: by.tes=32 time=28.ms TTL=241 乙肝
Request time.d out. 乙肝
Request time.d out.[成人用品]
请问是配置有.问题吗？以下是配置（基.于安全考虑，把地址用x.x.x.x代替）：服务器
#!/bin/sh
echo "1" >/p.roc/sys/net/ipv4/ip_for.ward 建材
iptables -F
iptables -X
iptables -t n.at -F.
iptables -.t nat -X 女人
iptables -P. INPUT ACCEPT 鲜花
iptables -P OUTPUT AC.CEPT 鲜花
iptable.s. -P FORWARD ACCEPT.
iptables -t.. nat -P PREROUTING ACCEPT.
iptables -t. nat -P OUTPUT. ACCEPT.
ip.tables -t nat .-P POSTROUTING ACCEPT--------------彩票
iptables -t nat -A POSTROUTING -o eth1 -s x.x..x.x -j SNAT --to-.source x.x..x.x 美容
iptables -t nat -A POSTROUTING -o eth1 -..m iprange --src-range x.x..x.x-x.x.x.x-j SNAT --to-source x.x.x.x.
iptables -A. FORWARD -m iprange --src-range x.x.x.x-x.x.x.x -m i.pp.2p --edk --kazaa --bit -j DROP 美容
ipta.bles -A FORWARD -p tcp -m iprange --src-range x.x.x.x-x.x.x.x -.m ipp2p --ares .-j DROP.
iptables -A FORW.ARD -p udp -m ipran.g.e --src-range x.x.x.x-x.x.x.x -m ipp2p --kazaa -j DROP外贸
[. 本帖最后由 w.elldrong 于 2006-6-13 16:13 编辑 ] 外汇
