网络dnat-阿里云

搭建NAT网关就是为了实现在相同VPC内，没有公网IP的ECS借助有公网的ECS访问外网，或者是外网通过端口映射访问到内网服务器。 SNAT：实现没有公网IP的ECS实例借助有公网的ECS访问外网，但是外网无法访问到内网IP； DNAT：实现外网通过端口映射访问到内网服务器，但是不能实现内网ECS访...

iptables实现网络防火墙功能,SNAT以及DNAT功能

iptables实现网络防火墙功能,SNAT以及DNAT功能一、网络防火墙的实现 1.环境准备：虚拟机vmware workstation 11 系统CentOS 7.3 软件包安装:y...

iptables实现网络防火墙(二)——SNAT与DNAT

前言在前面的文章中，我们曾经简单的介绍过Linux内核中防火墙的基本概念，以及四表五链的相关知识，可参看 LINUX 防火墙介绍。并且也介绍了如何在Linux环境中搭建一个能够过滤协议和端口...

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