千家信息网

ASA 8.4命令解析

发表于:2024-11-11 作者:千家信息网编辑
千家信息网最后更新 2024年11月11日,前面发表了一篇文章是ASA 8.0版本的,后面用到8.4发现命令有很多不一样,特发一篇8.4版本的命令可以和前面命令做对比和参考需要注意的是1.这边没有nat 0,也就是说到DMZ区域不需旁路。2.如
千家信息网最后更新 2024年11月11日ASA 8.4命令解析

前面发表了一篇文章是ASA 8.0版本的,后面用到8.4发现命令有很多不一样,特发一篇8.4版本的命令可以和前面命令做对比和参考

需要注意的是

1.这边没有nat 0,也就是说到DMZ区域不需旁路。

2.如果是ASA 5505的设备,则需定义vlan端口地址然后把防火墙相应端口加入对应vlan.

:

ASA Version 8.4(2) //版本8.4

!

hostname fw

enable password 8Ry2YjIyt7RRXU24 encrypted

passwd 2KFQnbNIdI.2KYOU encrypted

names

!

interface GigabitEthernet0

nameif inside

security-level 100

ip address 192.168.1.254 255.255.255.0

!

interface GigabitEthernet1

nameif dmz

security-level 50

ip address 172.16.1.254 255.255.255.0

!

interface GigabitEthernet2

nameif outside

security-level 0

ip address 221.222.1.2 255.255.255.0

!

interface GigabitEthernet3

shutdown

no nameif

no security-level

no ip address

!

interface GigabitEthernet4

shutdown

no nameif

no security-level

no ip address

!

interface GigabitEthernet5

shutdown

no nameif

no security-level

no ip address

!

ftp mode passive

object network inside //定义nat内部网段

subnet 0.0.0.0 0.0.0.0

object network outside //定义外网地址

host 221.222.1.2

object network telnet //定义需发布端口的内部服务器地址

host 172.16.1.2

object network www

host 172.16.1.1

object network towww //定义NAT转换的外部内址(此地址做静态NAT)

host 221.222.1.3

object network totelnet

host 221.222.1.4

object network natoutside

host 221.222.1.5

access-list outtodmz extended permit tcp any object www eq www //定义需要放行的流量

access-list outtodmz extended permit tcp any object www eq telnet

access-list outtodmz extended permit tcp any object telnet eq telnet

access-list outtodmz extended permit tcp any object telnet eq www

pager lines 24

mtu dmz 1500

mtu outside 1500

mtu inside 1500

no failover

icmp unreachable rate-limit 1 burst-size 1

no asdm history enable

arp timeout 14400

!

object network inside //定义动态多对一NAT

nat (dmz,outside) dynamic interface

object network telnet //定义端口转换

nat (dmz,outside) static interface service tcp telnet 2023

object network www //定义静态一对一NAT

nat (dmz,outside) static towww

access-group outtodmz in interface outside //应用ACL到端口进行流量放行

route outside 0.0.0.0 0.0.0.0 221.222.1.1 1 //默认路由

timeout xlate 3:00:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02

timeout sunrpc 0:10:00 h423 0:05:00 h325 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00

timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00

timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute

timeout tcp-proxy-reassembly 0:01:00

timeout floating-conn 0:00:00

dynamic-access-policy-record DfltAccessPolicy

user-identity default-domain LOCAL

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart

telnet timeout 5

ssh timeout 5

console timeout 0

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept

!

class-map inspection_default

match default-inspection-traffic

!

!

policy-map type inspect dns preset_dns_map

parameters

message-length maximum client auto

message-length maximum 512

policy-map global_policy

class inspection_default

inspect dns preset_dns_map

inspect ftp

inspect h423 h325

inspect h423 ras

inspect ip-options

inspect netbios

inspect rsh

inspect rtsp

inspect skinny

inspect esmtp

inspect sqlnet

inspect sunrpc

inspect tftp

inspect sip

inspect xdmcp

inspect icmp

!

service-policy global_policy global

prompt hostname context

no call-home reporting anonymous

call-home

profile CiscoTAC-1

no active

destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService

destination address email callhome@cisco.com

destination transport-method http

subscribe-to-alert-group diagnostic

subscribe-to-alert-group environment

subscribe-to-alert-group inventory periodic monthly

subscribe-to-alert-group configuration periodic monthly

subscribe-to-alert-group telemetry periodic daily

crashinfo save disable

Cryptochecksum:ceec7cf7a060a0ab5127d816542bb2db

: end


ASA QOS限速实例


access-list qos extended permitip host 192.168.1.10 host 192.168.2.10

access-list qos extended permitip host 192.168.2.10 host 192.168.1.10

class-map qos

match access-list qos

policy-map qos

class qos

police output 10000

police input 10000

service-policy qos interfaceinside


注意:

如果流量是已经建立的会话,那么数据包不会去找新建立的策略

只有在新建立的策略以后新生成的会话,才会撞击这个策略

http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113396-asa-packet-flow-00.html


8.3以后若有NAT, ACL需匹配源实际IP地址。

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