Firewall and Service Management on Linux Essay Example | Topics and Well Written Essays - 1000 words

Firewall and Service Management on Linux - Essay ExampleIf the system is connecting to other systems for the design of sending data out, for any number of possible reasons, including data theft, or participation in a botnet as an example.netstat - an option lists all listening expressions of transmission control protocol and UDP connections. It might be useful whatevertimes to be able to list them all when analyzing a clients system, given that it gives the big picture. However, when context is needed, some more filtering should be done to get a better idea of the issues one is dealing with. and so other commands need to be used in order to provide better context. However, if a port is open that the client system is not using then the port needs to be disagreeable to protect the client system from an attacker.netstat at shows all TCP (Transmission Control Protocol) port connections only. TCP statistics bay window show when a client system is being attacked, such as during deni al of service attacks. TCP parameters which show dropped connection requests increase rapidly when under attack.netstat ant shows the output without running a DNS query, which would dumb down the command response time. Instead, it will only show the IP address without showing estate names. This might be more useful when time is of essence, and one needs answers fast in oddball of an attack on a client system.netstat nlpu shows the process that owns listening UDP socket connections. sudo netstat nlpu shows the process owner and process ID (PID). This is useful in determining which program is running a process. This can help determine whether it is a rapscallion process or not, and can help in hardening client systems.The netstat command shows detailed statistics of distributively network connection, interface, routing tables, network protocols and it also displays other network-specific information. The netstat command helps us to deal with network issues in Linux. lucre administ rators are also encouraged to have enhanced performance measurement when they use the netstat command.