Saboteur vs. Restauranteur

فهرست عناوین اصلی در این پاورپوینت

فهرست عناوین اصلی در این پاورپوینت

● Denial of Service WORLDS ATTAKS
● Good News / Bad News
● Why do I want to be secure?
(What’s in it for me?)
● The 3 Main Forms of Bad Guys
● Viruses / Worms
● Trojan horse
● Denial of service ( DOS )
● Where are you
● Where they come from
● What is Denial of Service Attack?
● How to take down a restaurant
● Saboteur vs. Restauranteur
● Categories of DOS attack
● Types
● PING OF DEATH
● Smurf and Fraggle
● LAND Attack
● Synchronous flood
● An example: TCP SYN flooding
● Direct Single-tier DoS Attacks
● Direct Dual-tier DoS Attacks
● Direct Triple-tier DDoS Attacks
● The Components of a DDoS Flood Network
● Distributed Denial of Service Attack (DDoS)
● Results expected
● Forms
● Internet Service Providers
● High loaded machines
● Also
● Can both do better some day
● ICMP
● ICMP Traceback
● Overview
● Throw away requests
● IP Tracing (or Syncookies)
● Digital signatures
● Connection timeout
● A Solution: client puzzle

by Juels and Brainard
with improvement by Wang and Reiter
● Intuition
● The client puzzle protocol
● What does a puzzle look like?
● Puzzle basis: partial hash inversion
● Puzzle construction
● Puzzles cannot always be used
● references


نوع زبان: انگلیسی حجم: 6.2 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 74 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/05/16 06:14:20

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

., attack, network, service, ping, do, type, computer, –, bad, packet, denial,

توجه: این مطلب در تاریخ 2019/05/16 06:14:20 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

http://www.just.edu.jo/~tawalbeh/nyit/incs745/presentations/DoS2.ppt

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: ., attack, network, service, ping, do, type, computer, –, bad, packet, denial,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

denial of service worlds attaks prepared by mohammed mahmoud hussain supervised by dr. lo’ai tawalbeh nyit winter ۲ ۷ good news bad news the internet and networks give us better connectivity share information collaborate a synchronously the internet and networks give us better connectivity viruses can spread easier the bad guys now have easier access to your information as well why do i want to be secure what’s in it for me you can ensure private information is kept private some things are for certain eyes only and you probably want to keep them that way is someone looking over your shoulder physically or virtually the ۳ main forms of bad guys virus worm trojan denial of service viruses worms most widely known – thanks to press coverage what is it computer programs written by bad guys to do malicious things often triggered by a specific event example – word macro virus that sends out junk email when word document is opened trojan horse most dangerous of all what is it computer programs often written by good guys but used by bad guys to give them a back door to intended computer example – remote management application that runs in background and allows the bad guys to get in and use your computer as they wish typically can not be safely removed – must start from working backup or scratch because deleting modifying data files is one of their goals stealing personal information also interrupting destroying business processes contingency plan denial of service dos too many requests for a particular web site clog the pipe so that no one else can access the site also the using of land attack possible impacts may reboot your computer slows down computers certain sites applications become inaccessible you are off. where are you every one has to know that they come from ۳ places new files viewed content exposed services where they come from unwanted email with attachments you weren’t expecting downloaded programs from the internet that come from less than trustworthy locations file sharing programs p۲p websites that will install things for you the more open doors your computer has the more chance of someone coming in what is denial of service attack attack in which the primary goal is to deny the victim s access to a particular resource. a denial of service attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service. how to take down a restaurant saboteur restauranteur saboteur vs. restauranteur saboteur restauranteur saboteur restauranteur no more tables denial of service attacks are most frequently executed against network connectivity. the goal is to prevent hosts or networks from communicating on the network. an example of this type of attack is the syn flood attack categories of dos attack bandwidth attacks protocol exceptions logic attacks a bandwidth attack is the oldest and most common dos attack. in this approach the malicious hacker saturates a network with data traffic. a vulnerable system or network is unable to handle the amount of traffic sent to it and subsequently crashes or slows down preventing legitimate access to users. a protocol attack is a trickier approach but it is becoming quite popular. here the malicious attacker sends traffic in a way that the target system never expected such as when an attacker sends a flood of syn packets. the third type of attack is a logic attack. this is the most advanced type of attack because it involves a sophisticated understanding of networking. a classic example of a logic attack is a land attack where an attacker sends a forged packet with the same source and destination ip address. many systems are unable to handle this type of confused activity and subsequently crash. types types of dos attacks the infos here introduce the common types of dos attacks many of which can be done as a ddos attack. ping of death a ping of death attack uses internet control message protocol icmp ping messages. ping is used to see if a host is active on a network. it also is a valuable tool for troubleshooting and diagnosing problems on a network. as the following picture a normal ping has two messages but with a ping of death attack an echo packet is sent that is larger than the maximum allowed size of ۶۵ ۵۳۶ bytes. the packet is broken down into smaller segments but when it is reassembled it is discovered to be too large for the receiving buffer. subsequently systems that are unable to handle such abnormalities either crash or reboot. you can perform a ping of death from within linux by typing ping –f –s ۶۵۵۳۷. note the use of the –f switch. this switch causes the packets to be sent as quickly as possible. often the cause of a dos attack is not just the size or amount of traffic but the rapid rate at which packets are being sent to a target. tools jolt sping icmp bug icenewk smurf and fraggle a smurf attack is another dos attack that uses icmp. here an request is sent to a network broadcast address with the target as the spoofed source. when hosts receive the echo request they send an echo reply back to the target. sending multiple smurf attacks directed at a single target in a distributed fashion might succeed in crashing it. if the broadcast ping cannot be sent to a network a smurf amplifier is …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: ., attack, network, service, ping, do, type, computer, –, bad, packet, denial,

این فایل پاورپوینت شامل 74 اسلاید و به زبان انگلیسی و حجم آن 6.2 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/05/16 06:14:20 استخراج شده است.

http://www.just.edu.jo/~tawalbeh/nyit/incs745/presentations/DoS2.ppt

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