Configuring SSH Access on a Cisco ASA 5510 Firewall

• Enter configuration mode

fw> 
fw> enable
fw#
fw# config t
fw(config)#

• You need to have an enable password to use ssh

fw(config)# enable password <your password>

• User name and password to connect via ssh

fw(config)# username <your username> password <your password>

• Configure Authentication Mode

fw(config)# aaa authentication ssh console LOCAL

• Specify ssh protocol version

fw(config)# ssh version 2

• Allow Access from a particular network over a particular interface ("inside" is the interface name)

fw(config)# ssh 192.168.0.0 255.255.255.0 inside

• Generate a key pair

fw(config)# domain-name <your domain>
fw(config)# crypto key generate rsa modulus 1024

• Exit configuration mode

fw(config)# exit
fw# 
fw# disable
fw>

That's it. You can now connect to your ASA 5510 Firewall via ssh on Port 22 from Network 192.168.0.0/255.255.255.0.