Hello,
here is an excerpt from the 8.x configuration guide:
Enabling HTTPS Access
To configure ASDM access, follow these steps:
Step 1 To identify the IP addresses from which the security appliance accepts HTTPS connections, enter the
following command for each address or subnet:
hostname(config)# http source_IP_address mask source_interface
Step 2 To enable the HTTPS server, enter the following command:
hostname(config)# http server enable [port]
By default, the port is 443. If you change the port number, be sure to include the new port in the ASDM
access URL. For example, if you change it to port 444, enter:
https://10.1.1.1:444
Step 3 To specify the location of the ASDM image, enter the following command:
hostname(config)# asdm image disk0:/asdmfile
For example, to enable the HTTPS server and let a host on the inside interface with an address of
192.168.1.2 access ASDM, enter the following commands:
hostname(config)# crypto key generate rsa modulus 1024
hostname(config)# write mem
hostname(config)# http server enable
hostname(config)# http 192.168.1.2 255.255.255.255 inside
To allow all users on the 192.168.3.0 network to access ASDM on the inside interface, enter the
following command:
hostname(config)# http 192.168.3.0 255.255.255.0 inside
Accessing ASDM from Your PC
From a supported web browser on the security appliance network, enter the following URL:
https://interface_ip_address[:port]
In transparent firewall mode, enter the management IP address.
