A Network Security System - Essay Example

Additionally, Netstat can be used to show sockets that are listening to your system.  Netstat can be used to help determine if there are unauthorized outlets open to or from your system, which could indicate malicious activity being directed towards your system.

System CT is a command-line utility that is used to control various aspects of services on a system (start or stop, run at startup).  It is used to introspect the state of the system and service manager.

Major options used

System ctlg

-t, --type= The argument is usually a comma-separated list of unit types such as service and socket

--state= a comma-separated list should be used as the argument for unit LOAD, SUB, or ACTIVE status. The specified states are shown when the units are listed.

-p,--property= Used when teaching unit/manager properties with show command, limit the display to certain features as specified by the argument

-a,--all  Used when listing groups, showing all loaded units and inactive units regardless of their state. Also shows all properties regardless of whether they are set or not. The list group files command is often used in listing all units.

--runtime: used with enable, disable or edit, it makes changes temporarily and are lost on reboot

Netstat options

-a = used to display active TCP connections with the listening state and UDP ports being that is being listened.

-b = shows the process actual file name

-e = used as a switch to display statistics about the network connection.

-f = makes the command display the fully qualified domain name (FQDN), and foreign IP addresses are applicable.

-n = used to prevent Netstat from attempting to determine hostnames for external IP addresses.

-o = used for troubleshooting tasks and displays the PID associated with any displayed connection.

-s = used to show detailed statistics by protocol.

-t + shows the current TCP Chimney offload state in the place of the displayed TCP state.

-x = shows all network direct listeners, connections, and endpoints.

Firewall options

The firewall uses many options specifically for certain tasks. There are options for administrator accounts, anti-virus, audit, downloads, DNS, amongst others.

These commands can be used on various operating systems and can be applied to any network issues, and system administrators and network and internet administrators can use them.

In troubleshooting common system errors, these commands are easier to use and understand.