...Packet Filtering Index Should arriving packet be allowed in? Should a departing packet be let out? Filter packet-by-packet, making decisions to forward/drop a packet based on: Functions of Packet Filter Control: Allow only those packets that you are interested in to pass through. Security: Reject packets from malicious outsiders Watchfulness: Log packets to/from outside world In a software firewall, packet filtering is done by a program called a packet filter. The packet filter examines the header of each packet based on a specific set of rules, and on that basis, decides to prevent it from passing (called DROP) or allow it to pass (called ACCEPT). There are three ways in which a packet filter can be configured, once the set of filtering rules has been defined. In the first method, the filter accepts only those packets that it is certain are safe, dropping all others. This is the most secure mode, but it can cause inconvenience if legitimate packets are inadvertently dropped. In the second method, the filter drops only the packets that it is certain are unsafe, accepting all others. This mode is the least secure, but is causes less inconvenience, particularly in casual Web browsing. In the third method, if the filter encounters a packet for which its rules do not provide instructions, that packet can be quarantined, or the user can be specifically queried concerning what should be done with it. This can be inconvenient if it causes numerous dialog boxes to appear...
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...Packet Switching The concept of packet switching was first developed in the early 1960s, by researchers at the Massachusetts Institute of Technology. Packet switching is the dividing of messages into packets before they are sent, transmitting each packet individually, and then reassembling them into the original message once all of them have arrived at the intended destination. Packets are the fundamental unit of information transport in all modern computer networks, and increasingly in other communications networks as well. Each packet, which can be of fixed or variable size depending on the protocol, consists of a header, body, and a trailer. The body contains a segment of the message being transmitted. The header contains a set of instructions regarding the packet's data, the number of packets into which the message has been divided, the identification number of the particular packet, the protocol, packet length and synchronization. Packets are typically routed from source to destination using network switches and routers. Each packet contains address information that identifies the sending computer and intended recipient. Using these addresses, network switches and routers determine how best to transfer the packet to its destination Pros and Cons of Packet Switching Packet switching is the alternative to circuit switching protocols used historically for telephone (voice) networks and sometimes with ISDN connections. Compared to circuit switching, packet switching...
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... __________________________ «_____»_________________________2012 год Алматы 2012 СОДЕРЖАНИЕ 1 Annotation 3 2 PACKET SWITCHING 3 3 КОММУТАЦИЯ ПАКЕТОВ 6 ТЕРМИНОЛОГИЧЕСКИЙ СЛОВАРЬ 10 СПИСОК ЛИТЕРАТУРЫ 11 Annotation This text describes packet switching, its modes and history. The main topic of this text is how packet switching works. Packet switching is a digital networking communications method that groups all transmitted data – regardless of content, type, or structure – into suitably sized blocks, called packets. The concept of switching small blocks of data was first explored by Paul Baran in the early 1960s. Independently, Donald Davies at the National Physical Laboratory (NPL) in the UK had developed the same ideas a few years. Two major packet switching modes exist; (1) connectionless packet switching, also known as datagram switching, and (2) connection-oriented packet switching, also known as virtual circuit switching. In the first case each packet includes complete addressing or routing information. 1 PACKET SWITCHING Packet switching is a digital networking communications method that groups all transmitted data – regardless of content, type, or structure – into suitably sized...
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...IMPLEMENTATION OF PACKET SNIFFING IN JAVA USING JPCAP LIBRARY Project Report Submitted in Partial Fulfillment of the Requirement for the Award of Degree of Bachelor of Engineering in Computer Science Engineering of Rajiv Gandhi Proudyogiki Vishwavidalaya, Bhopal (MP) By Siddharth Pateriya Swarna Swaminathan (0131CS081077) (0131CS081084) Department of Computer Science Engineering Jai Narain College of Technology, Bhopal June – 2012 DECLARATION We, Siddharth Pateriya and Swarna Swaminathan, the students of Bachelor of Engineering (Computer Science Engineering), Jai Narain College of Technology, Bhopal hereby declare that the work presented in this Major Project is an authentic record of our own and has been carried out taking care of Engineering Ethics under the guidance of Prof. Manish Mishra. Siddharth Pateriya Swarna Swaminathan (0131CS081077) (0131CS081084) CERTIFICATE This is to certify that the work embodied in this Major Project entitled “Implementation of Packet Sniffing in Java using Jpcap Library” has been satisfactorily completed by the students of final year, Mr. Siddharth Pateriya and Ms.Swarna Swaminathan. The work was carried out satisfactorily under the supervision and guidance of the undersigned in the Department of Computer Science Engineering, Jai Narain College of Technology and Science, Bhopal for the partial...
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...Game.............2 Logging Packets...............3 Sending Packets...............3-4 Dynamic Packets..............5 Packet Blocking...............6 Packet Modification........6 Opcode Labeling..............7 Introduction to RiPEST...7 RiPEST Database.............8 Further Reading................8 1 RiPE Injecting RiPE: If you are using RiPE Launcher: Select the game or process that you want to inject into, and then click the "Inject" button. RiPE Launcher comes with RiPE. Make sure that RiPE Launcher is in the same folder / directory as RiPE.dll. If you are using Injector Gadget: Select the game or process that you want to inject into from the left. Add RiPE.dll to the DLLs to Inject list by browsing for it or dragging the .dll and dropping it into the DLLs to Inject box. After that is done, click the "Inject" button. Do NOT check "Cloak DLL." RiPE uses its own cloaking methods. Selecting a Game: After injecting, you should now see a "Game Selection" dialog. Select the game that you want to use RiPE for from the left, and the version from the right. Click on "Continue." You may additionally "Search for a Plugin" to search the RiPEST plugin database for other plugins. Plugins appear on the Game Selection menu just like any other game. 2 RiPE Logging Packets: To log packets, simply click "Hook Send" or "Hook Recv." Hook Send will log packets sent FROM the client TO the server. Hook Recv will log packets sent FROM the server TO...
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...oversubscribed port occurs, some of the packets must end up being dropped. Those client packets are being dropped will experience a slow-down in their file transfers or in the responsiveness of the network-based applications they are running. Overall network performance congestion could cause even though by subscribed high bandwidth ISP to internet access but hardware cannot utilizes the bandwidth ISP provide. b. Corruption If packets is corrupted by faulty cabling, electrical interference, or switch hardware faults then the corrupted packets will be dropped by the receiving switch. If corrupt packets at high rate it will cause a slow-down in network performance. Because servers/hosts require to resend the dropped packets again to the clients. If this issues did not fix it will cause the network traffic busy because the same data is resend again. It will occupied the network bandwidth cause another client on the network experience slow network. c. Collisions...
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...configure, maintain and monitor rules for multiple profiles, notifications and authenticated exceptions and he would also like me to be able to create and manage inbound and outbound rules and with windows firewall I can accomplish both of these task because Windows Firewall with Advanced Security works by examining the source and destination addresses, source and destination ports, and protocol numbers of a packet, and then comparing them to the rules that are defined by the administrator. When a rule matches a network packet then the action specified in the rule (to allow or block the packet) is taken. Windows Firewall with Advanced Security also lets you allow or block network packets based on whether they are protected by IPsec authentication or encryption. Then I could also have capabilities of Data encryption and connection security rules with Windows Firewall Data protection includes both data integrity and data encryption. Data integrity uses message hashes to ensure that information is not being changed while in transit. Hash message authentication codes (HMAC) sign packets to verify that the information received is exactly the same as the information sent. This is called integrity and it is critical when data is exchanged over unsecured...
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...Expectations from students: The aim of this Term Paper is to produce a Programming logic or Animation on the assigned Topic. The assignment is to read the existing system/problem and create a program of your concept to obtain the expected results. Assistance from text and reference books, articles and reports on the concerned topics from Internet can be taken but the animation logic should be your own piece of work. Along with, students are supposed to write an abstract of the topic with example, real world applications, and impact on society or solutions recommended. Abstract submission: (3-4 pages) • Description of the topic • Example of the given topic • Future plan of the given work. The Abstract (Synopsis) of the topic must be submitted latest by 15thof Sept and submission will be accepted thereafter. Final submission: a) A report containing following contents: 1. Introduction Provide a brief textual description of the problem. Elaborate on the given problem statement, providing some more detail. 2. Background a. What was the weakness in the previous algorithm/concepts and requirement of existing algorithm/concept? 3. Methodology : a. Steps of making the program (graphics be used to showcase the output) 4. Observation a. Result in the form of output and a well formatted report. 5. Future Scope and Suggestion --- Suggestion to improve the existing...
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...for a change in the way data is delivered. Currently it’s by one packet of information (data) at a time. After some research I have learned there are a number of ways people are trying to change this method of data delivery. Some of them are: • Packets • Capsules • Holograms and Lasers • Teleportation I will give a brief explanation of each one and include the advantages and disadvantages. The current technology uses packets which are small files of information wrapped by a header and footer with security information on the both sides. These are the destination the packets are being sent to and the source that the packets are coming from. The advantages are: Packets are very secure because they can use encryption. Key exchange algorithms are used to securely exchange a shared secret value between two computers over an unsecured network connection. The computers exchange information that, when processed by the algorithm, produces the shared secret value. A third computer listening on the network and intercepting network packets between the first two computers cannot determine the shared secret value. The shared secret value can then be used as a session key, or to generate a session key, to encrypt the rest of the communications used in the IPsec negotiations. (Technet) • Small enough to send quickly The disadvantages are: • high learning curve • only sent one packet at a time Bottom line with packets it is like downloading a two-hour movie in 3 hours with a Fast-Ethernet...
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...in which we can keep a check on the number of duplicate packets generated due to the Flooding Routing technique? - Hop Count: A number of potential hops is included in the header of the packet. If the sender knows how many hops it will take to get to the destination the hop count is set to that number. If it doesn’t, it sets the hop count to the highest possible number of hops in the network. Then, each time the transmission hops the hop count is reduced by one. When it reaches zero, that individual transmission is discarded as at this point one of the many flooded transmissions should have been delivered and any extras can be discarded. - Selective Flooding: In selective flooding, as opposed to sending the transmission...
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... Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.5, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 0/0/2 ms PC>ping 192.168.1.5 Pinging 192.168.1.5 with 32 bytes of data: Reply from 192.168.1.5: bytes=32 time=1ms TTL=128 Reply from 192.168.1.5: bytes=32 time=0ms TTL=128 Reply from 192.168.1.5: bytes=32 time=0ms TTL=128 Reply from 192.168.1.5: bytes=32 time=0ms TTL=128 Ping statistics for 192.168.1.5: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 1ms, Average = 0ms Packet Tracer PC Command Line 1.0 PC>ping 192.168.1.4 Pinging 192.168.1.4 with 32 bytes of data: Reply from 192.168.1.4: bytes=32 time=1ms TTL=128 Reply from 192.168.1.4: bytes=32 time=0ms TTL=128 Reply from 192.168.1.4: bytes=32 time=0ms TTL=128 Reply from 192.168.1.4: bytes=32 time=0ms TTL=128 Ping statistics for 192.168.1.4: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 1ms, Average =...
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...Cost of yoodles is Rs. 10. 2. Sales Pattern in two halfs of 2011 is in the ratio 45:55. 3. The Duzy Pasar Retail Chain is available in 77 cities Working: | Demeter | Category | Total sales Ytd. 2011(Rs.) | 15381861.56 | 314249823.08 | Projected Yearly sales FY 2011(Rs.) | 34147733 | 697634607 | Target Market share | 15% | - | New Projected Sales FY 2011 | 104645191 | - | Incremental Sale | 69995007 | | Total Cost of BTL | 109152928 | - | ROI | 64% | - | Calculation of the cost: The following are the various costs for the BTL activities: Sample explanation: 1. Wet Sampling: 1 packet will serve 5 customers No. of customers per day: 40 (metros)+ 30(B & C Class cities) No. of packets per day per hyper per metro: 8+5.2=13.2 Total no. of packets: 8*15 (metros)+ 5.2* (77-15)= 442 Cost per day: 442* 7(unit cost of a packet)= 3097 per month Total cost for the next six month (2nd half-year): Rs. 557424 Similar calculations are done for other BTL Strategies. Analysis of the data provided: 1. For yoodles, in terms of cities. , the highest growth in sales nos.is in Mini metros & town class (‘C’ & ’D’ Class cities). 2. Also, the growth is highest for Modern Stores- Urban. 3. Region wise: * In Ytd. 2010, South & East did decently whereas North & west had extremely poor sales. * In Ytd. 2011, North & West picked up in sales. But Still we have highlighted North & West to strengthen its Market...
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...Wireshark Wireshark, a network analysis tool formerly known as Ethereal, collects packets in real time and display them in human-readable format. Wireshark includes filters, color-coding and numerous other features that allows deep analysis of network traffic and scrutinizes specific packets. It is used for networking troubleshooting, Malware analysis and education purposes. NMAP Nmap ("Network Mapper") is a Free Security Scanner for Network Exploration and Hacking. It is utilised to scan a network and collects data about the target network. It reports on open ports, Services running in the host, OS information and packet filters and firewall information. John the Ripper John the Ripper (JTR) is free and fast password cracker. Its main purpose is to detect susceptible UNIX passwords. It is one of the most widespread password...
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...Kod Projek : | BITU 3973 | UNIVERSITI TEKNIKAL MALAYSIA MELAKAFACULTY OF INFORMATION AND COMMUNICATION TECHNOLOGYPROJEK SARJANA MUDA 1PROPOSAL FORM[Incomplete form will be rejected] | A | TITLE OF PROPOSED PROJECT:Tajuk projek yang dicadangkan :ANALYSIS ON IPV6 ATTACK (SMURF6) | B | DETAILS OF STUDENT / MAKLUMAT PELAJAR | B(i) | Name of Student:Nama Pelajar: JAMALUDDIN BIN NAFIS Identity card no.:No. Kad Pengenalan : 910424-14-6277Student card no.:No. Kad Pelajar : B031310034 | B(ii) | CorrespondenceAddress :Alamat Surat Menyurat : 66G JLN MELUR 3 SERI MELUR KG MELAYU AMPANG 68000 SELANGOR DARUL EHSAN. | B(iii) | Program Pengajian:Study Program:BITS BITS BITM BITM BITI BITI BITC BITC BITD BITD | B(iv) | Home Telephone No.: No. Telefon Rumah: Handphone No.:No. Telefon Bimbit: 017-6160196 | B(v) | E-mail Address:Alamat e-mel: jamaluddin.nafis@ymail.com | C | PROJECT INFORMATION / MAKLUMAT PROJEK | C(i) | Project Area (Please tick): Bidang Projek (Sila tanda ( √ )): A. Intelligent Information Systems Sistem Informasi Pintar B. Software Technology Teknologi Perisian C. Database Technology Teknologi Pangkalan Data...
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...A SEMINAR REPORT ON | PACKET SNIFFER | SUBMITTED BY SUBMITTED ONKUNAL GOPAL THAKUR MAY 14,2010VISHAL SHIRGUPPIJUSTIN FRANCISSHAZIA ALIUNDER THE GUIDANCE OF MR. SUNIL SURVEFR. CONCEICAO RODRIGUES COLLEGE OF ENGINEERINGBANDRA(W)MUMBAI – 400 050 | CERTIFICATE This is to certify that, Mr. KUNAL GOPAL THAKUR , Mr. VISHAL SHIRGUPPI ,Mr. JUSTIN FRANCIS and Ms. SHAZIA ALI have completed their project on PACKET SNIFFER satisfactorily in partial fulfillment under the department of Computer Engineering during academic year 2009-2010. ____________________________ Teacher In-Charge ACKNOWLEDGEMENT We would like to express our sincere thanks and gratitude to our guide Mr. Sunil Surve for his valuable guidance and suggestions. We are highly indebted to him for providing us an excellent opportunity to learn and present our studies in the form of this seminar report. We take this opportunity to thank the members of the teaching and non-teaching staff of Fr.CRCE for the timely help extended by them. Lastly thanking our parents, for their morale support and encouragement. Kunal Gopal Thakur Vishal Shirguppi Justin Francis Shazia Ali ABSTRACT: Packet sniffing is a technique of monitoring every packet that crosses the network. A packet sniffer is a piece of software or hardware...
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