Networking Security
Networking Security
Networking Security Threats
We as individuals interact with networks in our daily activities whether in the office, at home, or when we perform monetary transactions, use our mobile phones to make calls or use transport systems to get to work. Today, telecommunication and utility companies use networks to track phone, electricity or water usage and bill for it. Government agencies and organisations depend heavily on networks to communicate with their customers in areas such as credit or debit card transactions and billings. Many of our basic ways of life would be less convenient and many activities would be unfeasible without networks. Not astonishingly, network systems are criminals and intruders targets of choice, because of their potential vulnerabilities.
What makes a network vulnerable?
Connecting computer systems together is incredibly risky due to potential system misconfiguration, poor security policies and software flaws. Criminals can gain unauthorised access to remote networks. Intruders can capture transmissions between network nodes. Furthermore, linking networks enables organisations and individuals, including criminals, to communicate in ways that were not feasible before, resulting in a new set of vulnerabilities. Misuse of newly discovered vulnerabilities by intruders often catches us unaware. There is a need to keep information systems and the networks which carry the associated information or data secure. There are many names for these, from networking security to information assurance. The overriding set of principles are those of C I A (Confidentiality, Integrity, Availability), which are considered by many to be the tenets or principles of computer security. Digital assets include the entire network infrastructure, system application programs including data.
To read the second half of this article, please visit out networking security articles at HoneyJet.co.uk.
on March 22, 2007 at 4:55 pm
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The package isn’t in the Ubuntu repository unfortunately..
on March 22, 2007 at 5:18 pm
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on March 22, 2007 at 5:58 pm
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Network security involves practices that reduce the risk of having information get into the wrong hands or preventing unwanted programs or individuals from distrupting your quality of service. This can be achieved in three ways
- Physical Security
- Application Security
- Hardware Security.
Physical trying to limit physical access to a computer or networking devices. This can be done by housing critical devices in areas that few people have knowledge, requires keys, or smart card access.
Hardware security reflects on networking devices such as routers and firewalls that have builtin virus scanners or access rules. Access rules are a defined list of both allowed and not allowed activities or programs. Similar to a bouncer at a bar, they inspect everything that goes in or out. Some also act as honey pot which pretends to be computer or server and will act as a scout that will alarm the adminstrator of possible threats. Some devices are advanced enough to offer hardware based encryption or reroute traffic when a threat is found.
Application Security mostly deals with access permissions or group policies, encryption and programs located on a computer or server. Firewalls , antispam, spyware or virus scanners are the common tools that will be found at this level. Along with having a physical firewall scanners and encryption, application based solutions are needed because one level miss a threat. For example if a threat originates from within a network, considerable damage could of occured before its isolation with out the additional application layer.
Group policies and access permissions are in some ways similar to a firewall. Not only do they have a list of which activities or programs are permitted, but depending on restrictions, they can deny access to files or certain tasks on a computer such as changing the system date or installing software. Finally, a true secure network environment is totally isolated meaning no network connection or physical access that simple. But that's not practical so have these three layers is must.
on March 22, 2007 at 6:11 pm
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Btw, what’s the common use for this? I’m using arpspoofing techniques, but it’s frustrating, I’m trying to understand how it works better. I can forward packets from one IP to me, but how do you do a whole subnet?
on March 23, 2007 at 8:49 pm
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Small packets can slip through a firewall, where there are rules for sting comparisons.
i.e. you have a rule to block packets containing the string worm.exe
but the message is so split up/fragmented, worm is in one packet, .exe is in an other, therefore it doesen’t match the rule set and allowed by the firewall.
on March 24, 2007 at 7:47 am
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You can easily find job there; For that must thing is that you should have enough experience to clear their requirements.
For getting job in computer networking you have to be CCNS or MCSE certified. Try to gain knowledge and then go for it.
Give your 100% otherwise not.
Best of Luck Dude