Cisco Adaptive Security Appliance (ASA) Configuration: Standard Firewall Ports
As with all the Cisco networking devices you can connect a number of ports to cables on the Adaptive Security Appliance (ASA). The ASA’s ports are
Console: Serial configuration port for command line access to ASA management and configuration.
Ethernet/Fast Ethernet/Gigabit: Standard network interfaces that are used to connect different network segments. Depending on the ASA model you have, you have a mixture of Fast Ethernet and Gigabit ports, which will be copper RJ45 connections or small form-factor pluggable (SFP) modules. Also, depending on your device, you may have Power over Ethernet (POE) ports.
USB ports: Currently not used on the ASA series, the USB ports are there for future features that may be implemented in the series.
Expansion port: If your ASA model has an expansion module, it will be either the Security Services Card (SSC) or Security Services Module (SSM) connection for an appropriate expansion card model. These cards offload VPN encryption or implement additional feature sets, such as e-mail antivirus scanning.