内网主机通过外网主机上网

外网主机

yum install -y squid
systemctl start squid
systemctl enable squid
# 注释此行代码，并添加http_access代码
vim /etc/squid/squid.conf
#http_access deny all
http_access allow all
# 添加以下代码块后保存文件
cache_mem 64 MB
maximum_object_size 4 MB
cache_dir ufs /var/spool/squid 100 16 256
access_log /var/log/squid/access.log
visible_hostname squid.chao
# 重启
systemctl restart squid

内网主机

export http_proxy=http://外网主机IP:3128