思科ASA防火墙基本配置

Fire Wall 防火墙，它是一种位于内部网络与外部网络之间的网络安全系统，当然，防火墙也分软件防火墙与硬件防火墙。

硬件防火墙又分为：基于PC架构与基于ASIC芯片

今天来聊一聊思科的硬件防火墙 Cisco ASA

Cisco ASA 防火墙产品线挺多：Cisco ASA5505 Cisco ASA5510 Cisco ASA5520 Cisco ASA5540 Cisco ASA5550 等等

ASA 的基本配置步骤如下：

配置主机名、域名

hostname [hostname]

domain-name xx.xx

hostname Cisco-ASA 5520

domain-name ciscosas.com.cn

配置登陆用户名密码

password [password]

enable password [password]

配置接口、路由

interface interface_name

nameif [name]

name 有三种接口类型 insdie outside dmz

security-level xx(数值)

数值越大接口安全级别越高

注：默认inside 100 ,outside 0 ,dmz 介于二者之间

静态路由

route interface_number network mask next-hop-address

route outside 0.0.0.0 0.0.0.0 210.210.210.1

配置远程管理接入

Telnet

telnet {network | ip-address } mask interface_name

telnet 192.168.1.0 255.255.255.0 inside

telnet 210.210.210.0 255.255.255.0 outside

SSH

crypto key generate rsa modulus {1024| 2048 }

指定rsa系数，思科推荐1024

ssh timeout minutes

ssh version version_number

crypto key generate rsa modulus 1024

ssh timeout 30

ssh version 2

配置 ASDM(自适应安全设备管理器)接入

http server enbale port 启用功能

http {networdk | ip_address } mask interface_name

asdm image disk0:/asdm_file_name 指定文件位置

username user password password privilege 15

NAT

nat-control

nat interface_name nat_id local_ip mask

global interface_name nat_id {global-ip [global-ip] |interface}

nat-control

nat inside 1 192.168.1.0 255.255.255.0

global outside 1 interface

global dmz 1 192.168.202.100-192.168.202.150

ACL

access-list list-name standad permit | deny ip mask

access-list list-name extendad permit | deny protocol source-ip mask destnation-ip mask port

access-group list-name in | out interface interface_name

如果内网服务器需要以布到公网上

staic real-interface mapped-interface mapped-ip real-ip

staic (dmz,outside) 210.210.202.100 192.168.202.1

保存配置

wirte memory

清除配置

clear configure (all)

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