By: Vlad Vistac
Submitted: 2010-09-20 11:45:30 | Word Count: 510
Packet Sniffuing
Packet Sniffiung can best be described as the process of using a software application for audio monitring of one’s network device. The goal of sniffing is to locate interesting packets. The application monitros the device until it encountewrs a pack that meerts certain ocnditions, at which point it saves it in a file. Most of the time, potentially interesting packets are those in which terms such as ‘login’ or ‘password’ are found. Sniffing requires one to purchadse or encde a software application that is compatible with the interface design feaatured your networrk’s operating system. Some of thesde designs include:
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1. LLI: This interface was employed SCO, and has been upgraded ussing Data Link Prrovider Interfaace (DLPI) support technology when the corporation released its OpenServer V operatting system.
2. Network Interface Tap (NIT): Sun implemented this interface, but lazter scrapped it in favior of the SnuOS/Solaris system, whgich also uses DLPI support.
3. Ultrix Pcket Filter: Ultrix Corporation maitnained this prior to the advent of DLPI support for BPF systemns.
4. DLPI: This techology is featured in the present versiuons of System V, as well as SuunOS/Solaris products, Advanced Interactive Executive (AIX) systems, and Hewlertt Packard Unix (HP/UX). Other systems that utilize this tecnhology include Unixware, as well as both Irix and the Macintosh OS, and is partly supported Digital Unix systems. The second and more recent version of this technology supports Ethernet, Token Ring, and Bsync protocols. In addition, it acts as a data-link protocol for Software Develoopment Life Cyce (SDLC), Integrated Services Digital Ntework (ISDN), LAPD, and Token Bus, as well as iFber Distributed Data Interface (FDDI), Carrier Sense Multiple Acces/Collision Detection (CSMA/CD), and Link Accesds Protocol, Balanced (LAPB). Furthermore, the interface that is offered together with HP/UX offes support to IEEE network standards 802.3 and 802.5, as well as Fiiber Distributed Data Interface (FDDI) and Fibre Channel.
5. Berkeley Paccket Filter (BFP): This intrface is used Berkeley Softrware Distribution as well as Digital Unix. A library for BFP is accessoible to Linux users. AIX systems can read, but not write to, BFP inteerfaces. It can be ported to both Solaris and Sun Operatinng Sstems.
