Network and System Security (Hacking: (Hacking is the attempt to gain…
Network and System Security
Hacking is the attempt to gain unauthorised access to a computer system.
It is an increasingly common criminal activity.
It exploits security weaknesses.
There is a need to protect sensitive systems and data from malicious access.
Most security problems are caused by people rather than systems.
Policies against hacking need to be enforced.
Network policies must reflect a priority to aim to secure businesses and organisations against hacking.
Policies need to be: Simple, well understood by all and updated as necessary.
There are many types of malicious software:
It is better to prevent malware than to cure it.
Anti-malware software can stop malware before it does any damage.
Browsers should be updated regularly.
Care should be taken when opening foreign email applications.
Data packets can be intercepted and examined.
Packet Sniffing can be used legitimately to detect attacks.
Many online servers use SQL to administer their databases.
SQL has a rich set of capabilities so it can be used to extract data and also to do damage.
Attempting to gain access to a network by bypassing the usual entry processes can be used legitimately to expose weaknesses.
Firewalls consist of:
Software or hardware or a combination of the two.
Rules applied to traffic determine whether to allow communication to take place.