Cisco Cookbook by Kevin Dooley, Ian Brown

By Kevin Dooley, Ian Brown

Every person who has labored with Cisco routers for any size of time has needed to ask their associates and associates for instance router configuration records that express easy methods to clear up a typical challenge. a very good operating configuration instance can frequently shop large quantities of time and frustration while imposing a function that you've by no means used prior to. The Cisco Cookbook gathers hundreds of thousands of instance router configurations multi functional position. because the identify indicates, Cisco Cookbook is equipped as a sequence of recipes. each one recipe starts with an issue assertion that describes a typical state of affairs that you simply may face. After every one challenge assertion is a quick answer that indicates a pattern router configuration or script for you to use to unravel this actual challenge. A dialogue part then describes the answer, the way it works, and in case you should still or will not be use it. The chapters are geared up via the function or protocol mentioned. while you're searching for info on a specific function resembling NAT, NTP or SNMP, you could flip to that bankruptcy and discover a number of similar recipes. such a lot chapters record simple difficulties first, and any strange or advanced events final. The Cisco Cookbook will speedy turn into your "go to" source for discovering and fixing advanced router configuration matters, saving you time and making your community extra effective.

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2 to be deleted due to the victim overload. – Popup spam: this kind of spam is similar of sending undesired Windows Messenger popups by using UDP port 1026 and 1027. Only one packet of 925 bytes is needed. The victims IP addresses do not highlight a regular pattern because two consecutive IP addresses have a gap of 200 addresses. The interarrivaltime is generally lower than 1 millisecond except every 200 flows where it is around 64 milliseconds and every 550 where it is 250 milliseconds. – SSH scan + TCP flood: the goal of TCP scan is to probe an SSH server by trying to log in.

We briefly present fundamental background information and present the anomaly detection part of the tool where we describe its main components. The more we describe the kernel function that has been used for the evaluation of Netflow records. In section 3 we describe the data set and the different attacks, used for the experiments and in section 4 we present our evaluation methods and discusses experimental results. Section 5 discusses related work and conclusions are given in section 6. 2 The Architecture of the Anomaly Detector In the following section, we present the architecture of our model.

The results are similar to those for the representative interval above, and the costs over the 8 bins are shown in Fig 3. We observe that attacking any of these indexes results in an entropy drop. The larger the probability the greater the decrease, and so the higher the camouflage cost. 24 L. Zhang and D. Veitch The above discussion is only an example. The same analysis is applicable to other concentrated attacks and detection based on other metrics. For example, a worm attack may use fixed source port numbers, resulting in significant changes in a few indices of the source port distribution.

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