View source for 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.