求教::关于Squid做透明代理的问题!

由 恍若如梦 在 06-17-2004 16:30 发表:

求教::关于Squid做透明代理的问题!

环境是这样的,一台trustix-2.0Linux服务器,用来拨号上网,一个HUB,一台Windowd2000系统,很简单的一个局限网,Linux服务器的IP地址为192.168.20.1,Windows2000系统IP地址为192.168.20.2,我想让Linux做透明代理服务器,2000通过这台代理服务器上网.

我的Squid2.5版本配置如下:

http_port 8080

cache_mem 8 MB

cache_swap_low 90

cache_swap_high 95

maximum_object_size 4096 KB

cache_dir ufs /opt/cache 100 16 256

cache_access_log /usr/local/squid/var/logs/access.log

cache_log /usr/local/squid/var/logs/cache.log

dns_nameservers 219.234.32.254

unlinkd_program /usr/local/squid/libexec/unlinkd

acl allwed_hosts src 192.168.20.0/255.255.255.0

http_access allow all

cache_effective_user sjweb

cache_effective_group sjweb

httpd_accel_host virtual

httpd_accel_port 80

httpd_accel_with_proxy on

httpd_accel_uses_host_header on

visible_hostname www.sina.com.cn

Iptalbes脚本如下:

#begin

echo 1 > /proc/sys/net/ipv4/ip_forward

modprobe iptable_nat

modprobe ip_conntrack

modprobe ip_conntrack_ftp

iptables -F INPUT

iptables -F FORWARD

iptables -F POSTROUTING -t nat

iptables -t nat -F

iptables -P FORWARD DROP

iptables -A FORWARD -s 192.168.20.0/24 -j ACCEPT

iptables -A FORWARD -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT

iptables -t nat -A POSTROUTING -o ppp0 -s 192.168.20.0/24 -j MASQUERADE

#end

现在的问题是,在2000系统上可以ping通192.168.20.1,把网关设置成为192.168.20.1,然后用Linux拨号上网,但2000却打开不了网页,直接输入IP地址也不行,能否让大家帮帮忙,谢谢!


由 Snoopy 在 06-17-2004 17:18 发表:


iptables需要添加规则


And then in the evening light, when the bars of freedom fall

I watch the two of you in the shadows on the wall

How in the darkness steals some of the choices from my hand

Then will I begin to under


由 恍若如梦 在 06-17-2004 21:12 发表:


请问如而添加呢?能帮写出来,谢谢!


由 faint 在 06-17-2004 21:24 发表:


你的FORWARD 的 Default Policies 都drop掉了。

把倒数二三条规则换成下面的试试:

iptables -A FORWARD -i ppp0 -s 192.168.20.0/24 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

iptables -A FORWARD -i ppp0 -d 192.168.20.0/24 -m state --state ESTABLISHED,RELATED -j ACCEPT

BTW:机器那么少,不用squid都可了:-),学习就另当别论


由 faint 在 06-17-2004 21:25 发表:


另外,如果你一定要squid的话,还得添加另外一二条规则:-)

自己找找.......


由 恍若如梦 在 06-17-2004 22:44 发表:


完完全全是为了学习,按上面的方法还是不行,包括squid非透明代理都不行,提示出错:

ERROR

The requested URL could not be retrieved

--------------------------------------------------------------------------------

While trying to retrieve the URL: http://219.234.32.251/

The following error was encountered:

Access Denied.

Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect.

Your cache administrator is webmaster.

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