associates keeping the big picture in sight

... being able to drive? The cost of eliminating the risk is just too high So the second method of dealing with risk is to minimize the risk In our example we can minimize the risk of accidents in ... characterize these criminals in a single profile, there are some interesting and useful criminal phenomena that we need to know to be effective in protecting information Several of these characteristics ... policeman wearing a gun you might think the risk is reduced If the street is in a suburban neighborhood you might feel there is less risk than if the street is in a big city If the street is in the middle...

Ngày tải lên: 18/10/2013, 18:15

... reproduce the original message The diagram in the slide illustrates packet switching The two computers in the picture need to communicate The first computer breaks the transmission up into packets The ... tight and talk into one of the cans, the sound can be heard through the other can The can you talk into is the transmitter, the can you listen from is the receiver, and the string is the medium How ... while at the same time, minimizing the cost of connecting all those people To solve this problem, the Party Line was invented On a party line, there is a single line that runs from the CO to...

Ngày tải lên: 22/10/2013, 16:15

... communications The ACK packet sends an acknowledgement of the message back to the originator, and the FIN packet starts the process of finishing the connection Finally, the numbers in parentheses are the ... close the connection first, the process starts when the PC sends a FIN packet to the server The FIN portion indicates to the server that the PC wants to close the connection (continuing with the ... using with the server) The server responds by sending an ACK to the PC acknowledging the FIN sent by the PC Next, the server sends a FIN packet to the PC to close its side of the connection Finally,...

Ngày tải lên: 22/10/2013, 16:15

... reader, but they also link the sentences in the paragraph together by stating the idea that they all relate to If you can’t locate a topic sentence, should the main idea be stated in one, instead ... – REVISING: THE BIG PICTURE If you think professional writers work alone, think again They know how important it is to get feedback before they send their work to the publisher—it’s ... related to the thesis If it’s not, it needs to be reworked or deleted (If you didn’t catch it when you were revising the big picture, here’s another chance.) Remember the importance of maintaining focus...

Ngày tải lên: 25/10/2013, 17:20

... machine, in this case the attacker, to the destination machine in this case Machine D The destination machine will then echo the data back to the source machine Plain and simple In the Smurf ... however, the attacker spoofs the information in the echo request Instead of using the attacker’s machine as the source machine, the attacker uses the address of the target machine as the source ... on the Internet.” The connection is then made to the Internet machine Once the connection is established, all communications between the original machine, 98.143.54.78 and the Internet machine...

Ngày tải lên: 26/10/2013, 23:15

... greatly increase the chances of one of them preventing or detecting the attack 23 Mitnick Attack: Bottom Line There is More to Intrusion Detection Than a Single Product! Intrusion Detection - The Big ... for WinNT, Unix, Win95, Mac 8.X, etc Intrusion Detection - The Big Picture - SANS GIAC © 2000 The SANS website is home to GIAC, the Global Incident Analysis Center, and to the SANS training materials, ... Is there a business case for intrusion detection? Intrusion Detection - The Big Picture - SANS GIAC © 2000 26 One of the threads we want to stay aware of during the course is whether or not the...

Ngày tải lên: 04/11/2013, 12:15

... information, giving or selling of that information to other companies, and giving the customer the option of correcting or removing their information from the company’s databases As the concept becomes ... As they are discovered, the anti-virus vendors develop methods for detecting and removing them They then put these new methods into updates to their software and distribute them to users of their ... it all in just six hours In fact, you probably can’t learn it all in six years The best professionals in the business have been involved in security for many, many years And the one thing they...

Ngày tải lên: 04/11/2013, 12:15

... report the detect This is the more detailed log file, notice the rule that found the detect is displayed at the top Then summary information about the packet The trace begins with the content of the ... Detection - The Big Picture - SANS GIAC © 2000 22 22 Deception Can Drive the Picture S S CIRT Meta CIRT S S CIRT S Intrusion Detection - The Big Picture - SANS GIAC © 2000 23 The point of this ... combination Intrusion Detection - The Big Picture - SANS GIAC © 2000 26 We strongly recommend combining the two types of intrusion detection, as their strengths are complementary For example, the...

Ngày tải lên: 09/12/2013, 17:15

... Online Auditing Tools Intrusion Detection - The Big Picture – SANS GIAC ©2000 As we begin our next section, we are going to cover a really interesting technology The timing of this is really interesting ... packet destined for? Intrusion Detection - The Big Picture – SANS GIAC ©2000 24 Egress filtering is focused on the addresses in the packet, but the most common filters are focused on the destination ... for the internal host that initiated the connection and so it rewrites the packet in its internal interface and sends the reply to the internal host This host will reply with a ACK to complete the...

Ngày tải lên: 10/12/2013, 14:16

... when you are in the office by the phone • Fix the red “priority” problems first Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 15 There is no point in configuring the scanner to ... on the motherboard The idea was to speed up equipment inventory You walk down the hall transmitting a code and the PCs respond by transmitting their serial number back There was a bug in the ... influence in community Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 31 One of the most interesting things about the hacker community is that the ones that rise to prominence are...

Ngày tải lên: 10/12/2013, 14:16

... mindset to think like an attacker! Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 16 One of the hardest things to keep in mind in building knowledge-based countermeasures is the ... read the script! In fact he may have had a hand in writing it Since they follow the script, the stunts he does are closer to professional wrestling because he certainly knows he is going to get the ... them – Tool to determine patch status Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 23 The NSWC checklist or the SANS Securing Windows NT Step by Step checklist are not the final...

Ngày tải lên: 10/12/2013, 14:16

... compromises In fact, firewalls themselves, which are an amazingly effective perimeter, contribute to the problem The people protected by the firewall think everything is OK since the firewall stops the ... aggravating that it resulted in creating the first wave of Windows personal firewalls including Nukenabber, the software that served as TCPwrappers for Windows systems 4-2 Inside a Network Attack WinNuke, ... report the detect This is the more detailed log file Notice the rule that found the detect is displayed at the top Then summary information about the packet is given The trace begins with the content...

Ngày tải lên: 10/12/2013, 14:16

... bad The bigger problems are shown below DTK can be a bear to configure, and nobody on the mailing list has proven to be too friendly In addition, the issue of checking another log is not minor The ... offer that service The attacker will then complete the connection and begin the attack, which can be recorded That is the end of the show however - at this point the firewall aborts the connection ... machine Information Risk Management - SANS ©2001 11 The bottom line on DTK is that it is in use and organizations are getting good results from it On Unix computers, the Internet Daemon, or inetd,...

Ngày tải lên: 10/12/2013, 14:16

... gravity is the compelling reason jumping from a plane without a chute is near-certain death, the continuous probing and poking of exposed systems on the Internet is the compelling reason the box ... analysis Cost, again, is more than the initial purchase cost There is the labor cost of monitoring the devices There is a life-cycle cost Benefits are the reduction in risk Keep in mind the most important ... from our internal address space coming in from the Internet trying to find their way home You can the same thing with your filtering router or firewall of course Many wireless networks are installed...

Ngày tải lên: 10/12/2013, 14:16