Cisco ASA 防火墙基本配置

Fire Wall  防火墙，相信混IT圈的小伙伴们都知道这玩意，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)