Tcpdump

Network security : System security comprises of the procurements and approaches received by a system executive to avoid and screen unapproved access, abuse, change, or dissent of a workstation system and system available assets. System security includes the approval of access to information in a system, which is controlled by the system head. Clients pick or are appointed an ID and secret word or other verifying data that permits them get to data and projects inside their power. System security blankets

tcpdump –x –s 70 host ip_addr1 and (ip_addr2 or ip_addr3): Capture ip_addr1 and ip_addr2 Capture ip_addr1 and ip_addr3 Capture ip_addr1 and ip_addr2 and ip_addr3 in 70 bytes length and displays in hexadecimal. tcpdump –x –s 70 host ip_addr1 and not ip_addr2: Capture ip_add1 without ip_addr2 in 70 bytes length and displays in hexadecimal. Exercise 9 LAB

it is impossible to copy the texts of the GNS3 screens and paste them into the browser you are using to take this course.) Type sudo tcpdump –xx –i eth0 into this terminal. You can stop it after a few minutes by entering ”CTRL c”. Note that this command displays only 4 lines, like this: which is enough for all but one of the questions. The sudo tcpdump -xx –s0 –i eth0 command must be used to see the whole frame. This command will collect all Ethernet frames passing through interface

execute the command in the zombie , we find the output as follows : In case the output is not clear , please see the output below : anshuman@zombie:/$ sudo tcpdump -tnn -c 20000 -i bond0 | awk -F "." '{print $1"."$2"."$3"."$4} ' | sort | uniq -c | sort -nr | awk ' $1 > 100 ' tcpdump: WARNING: bond0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on bond0, link-type EN10MB (Ethernet), capture size 96 bytes 20000 packets captured

Case Study 11.5: Ann Tunnels Underground The goal of this case study is to follow a packet capture file to investigate the fictitious character Ann Dercover. Examining the file will show how she uses network tunneling to cover her tracks, but more importantly, it will help develop skills that can be applied to network forensics. The challenge is to determine if the DNS traffic is truly suspicious, determine the purpose of the DNS traffic, recover all possible information on the local and remote

P r e e t V i m a l c h a n d J a i n P a g e | 1 Homework 3 CS 696 Network Management and Security Fall 2014 1. Have you thought more the project? How would you measure your success on the project? What are some concrete objectives and how much work do you think is involved? Yes I have thought more about the project as well searching and reading research papers so that I can get overview and understand the concepts in detail. I would measure it as it will help me to learn the skills of networking

“index” of network traffic that could be used to search for information in an efficient manner with more flexibility (Casey, E.). PCAPFAST stores header info in a SQLite database. Forensic examiners can query the database using syntax similar to tcpdump and

terminal-based (non-GUI) variant called Tshark. Wireshark, and alternate projects conveyed with it, for example, Tshark, are free programming, discharged under the terms of the GNU General Public License. Functionality: Wireshark is fundamentally the same to tcpdump, however has a graphical front-end, in addition to some coordinated sorting and sifting choices. Wireshark permits the client to put system interface controllers that backing indiscriminate mode into that mode, keeping in mind the end goal to see

Footprinting The phases of an attack 1. Reconnaissance Information gathering, physical and social engineering, locate network range 2. Scanning - Enumerating Live hosts, access points, accounts and policies, vulnerability assessment 3. Gaining Access Breech systems, plant malicious code, backdoors 4. Maintaining Access Rootkits, unpatched systems 5. Clearing Tracks IDS evasion, log manipulation, decoy traffic Information Gathering 1. Unearth initial information What/ Who is

1. Introduction Security is a standout amongst the most difficult and complex issue in Information Technology (IT) today. Security causes millions of dollars loss to the different organizations every year. Even if 99% of all assaults result from known vulnerabilities and flawed misconfigurations, an answer is most certainly not direct. With a crowd of networks, operating system and application related vulnerabilities, security specialists are getting the opportunity to be logically aware of the need