How to Configure a Cisco ASA 5510 Firewall – Basic Configuration Tutorial ?
In this example , i am going to show you Basic Cisco ASA configuration.
ciscoasa# configure terminal
ciscoasa(config)# hostname asa
asa(config)# domain-name rumyittips.com
asa(config)# enable password rumyittips
asa(config)# interface ethernet0/0
asa(config-if)# nameif outside
asa(config-if)# security-level 0
asa(config-if)# ip address 192.168.1.1 255.255.255.0
asa(config-if)# no shutdown
asa(config-if)# exit
asa(config)# interface ethernet0/1
asa(config-if)# nameif inside
asa(config-if)# security-level 100
asa(config-if)# ip address 192.168.3.1 255.255.255.0
asa(config-if)# no shutdown
asa(config-if)# exit
asa(config)# interface ethernet0/2
asa(config-if)# nameif dmz
asa(config-if)# security-level 50
asa(config-if)# ip address 192.168.2.1 255.255.255.0
asa(config-if)# no shutdown
asa(config-if)# exit
asa(config)# passwd rumittips
bigdog(config)# crypto key generate rsa
WARNING: You have a RSA keypair already defined named
<Default-RSA-Key>.
Do you really want to replace them? [yes/no]: yes
Keypair generation process begin. Please wait…
asa(config)# ssh 192.168.3.0 255.255.255.0 inside
asa(config)# exit
asa# write memory
Building configuration…
Cryptochecksum: 21657c19 e04a2a24 e502173c 8626e76d
[OK]
asa#
The first command that I executed in figure was to change the hostname of
the appliance to asa and a domain name of rumyittips.com. Following this, I configured a Privilege EXEC password of rumyittips.I then configured the three interfaces,
assigning them logical names, security levels, and IP addresses, and enabling them.
Once IP was configured, I wanted to be able to SSH on this appliance, so I assigned
a User EXEC password of rumyittips,generating the public and private RSA keys and
allowing any internal computer SSH access. Finally, I saved the appliance configuration—
remember that you can execute the write memory command at either Privilege EXEC
or Configuration mode.
You will actually need to do quite a few more things to pass traffic through your
appliance, like setting up routing, configuring translation policies (if necessary), setting
up ACLs, and many other policy configurations.
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