centos 7搭建正向代理服务器，代理内网PC上网

Posted 2022-05-08 小叶子i

备注	ip地址
正向代理服务器---centos 7	网卡1：192.168.3.21	网卡2：192.168.145.129
普通PC             ---kubuntu	192.168.145.128

1.centos服务器虚拟机的配置

服务器有两张网卡，一张网卡桥接到我的傻瓜家用路由器上网的，dhcp分配地址为192.168.3.21

另一张网卡设置成桥接到vmnet7 ，这是个私网，默认是无法上网的

2.PC 客户端的虚拟机设置

3.vmnet 7 这个网段的地址是192.168.145.0：

目前这个kubuntu客户端是无法上网的：

4.配置centos 7为squid正向代理服务器，centos7有两张网卡，其中一张网卡是可以上网的，如图ping baidu是通的

安装squid:

yum install -y squid

编辑squid配置文件

[root@localhost ~]# cp  /etc/squid/squid.conf  /etc/squid/squid.conf.bak   备份配置文件
[root@localhost ~]# vi /etc/squid/squid.conf            这是默认配置文件
#
# Recommended minimum configuration:
#

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 10.0.0.0/8     # RFC1918 possible internal network
acl localnet src 172.16.0.0/12  # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7       # RFC 4193 local private network range
acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines

acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT

#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports

# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on "localhost" is a local user
#http_access deny to_localhost
#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost

# And finally deny all other access to this proxy
http_access deny all

# Squid normally listens to port 3128
http_port 3128

# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256

# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid

#
# Add any of your own refresh_pattern entries above these.
#
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\\?) 0     0%      0
refresh_pattern .               0       20%     4320

这几处修改如下：

注意有两个http_access allow localnet,

默认端口修改成你想要的端口，我这里保持默认：

重启一下进程，查看一下端口号是tcp 3128，已在监听

接下来最重要的一步，关闭centos squid 服务器的防火墙：

systemctl stop firewall
systemctl disable firewall

重启服务器。重启好后，运行squid

systemctl start squid
设置squid为自启动
systemctl enable squid

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kubunt 客户端设置：

输入百度测试：

查看squid 日志