tech sectiontech sectionWireshark software captures network traffic and displays a color-coded chart of that traffic, making it more convenient for system administrators to detect network attacks. Some attacks are more subtle than others are, but you can use Wireshark to identify hacking attempts on your network. Examine the color-coded results – for example, red indicates the need for immediate attention – and then use this tool to further investigate potential threats to your network.
In the computer security community, a computer vulnerability is specifically a flaw or weakness in a software product that allows attackers to circumvent, or violate, security policies and gain unauthorized access to a computer system or network. As such, a computer vulnerability makes it impossible to use a software product without exposing the computer on which it is installed to unnecessary security risks.
Denial of service attacks make a computer resource, such as a website, unavailable to users by tying up bandwidth. Most DoS attacks are distributed attacks, or DDoS, made by multiple computers at once. The owners of these computers may not even be aware of their role in the attack; computers hijacked by malware can participate in a DoS attack automatically. DoS attacks violate acceptable use policies for nearly all ISPs and can seriously damage Internet resources. Site owners can use several techniques to protect against a DoS.
Cyber attacks come in several forms, with the hacker varying his methods depending on the target, the situation and what he is seeking. As security firms close an exposure or flaw, hackers find another. Some countries now employ hackers to launch cyber attacks on other countries, and companies use the same tactics on other companies. There are several cyber attacks that are the most employed by hackers around the world.
Denial of service attacks use command prompt commands to disable networks and websites. The seven denial of services classes are ping flood, ping of death, smurfing, fraggle, SYN flood, teardrop and distributed denial of service. The Cisco 7600 provides good protection against these attacks with just a basic configuration. For example, it automatically stops smurfing, which is when a hacker attempts to duplicate or clone your IP address. This floods your address with data and can crash your network. There are, however, more steps you can take to further protect your system.
Denial of Service is a type of attack made on a network or server to force that system to stop operating. It floods a computer connected to the Internet with bogus requests, thus occupying all the server's time and blocking out access to genuine requests.
No matter how hard security software producers work, the hackers continue to play "leap frog" with them, finding ways to beat the security and exploit software flaws. These flaws are found in operating systems, browsers and applications. Hacking has even gone corporate, with criminal organizations hiring hackers to do their bidding, creating networks of personal computers for their own criminal use, undetected by the computers' owners.
Wired Equivalent Privacy (WEP) encryption protects computer networks by authentication users. A network administrator sets his WEP encryption to use either shared network keys or open keys, each with its own advantages and drawbacks.
There is a legitimate file found on Windows computers called rundll32.exe. Rund1132 is part of a computer worm. The name was chosen in hopes that it would be mistaken visually for rundll32.
The Internet has brought many technological conveniences since its advent. However with the good often comes some bad. The bad in this case came in the form of Internet virus and intrusions. One such intrusion is the Ddos or denial of service attacks. These attacks can range from annoyances to excessive loss of revenue for business on the Internet. Identifying these attacks is crucial to stemming the damage they cause.
