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1402 زییاپ - 41 هرامش ابرهک - رتویپماک و قرب یسدنهم یصصخت همانلصف

Mapping of external network layers through

TCP/IP protocols vulnerability

Hossein Shadi Graduated،Senior Associate, Information
Technology Engineering, University of
Qom,Iran,ho3einshadi@gmail.com

Yaqub Farjami Professor, Associate Professor,
Information Technology Engineering,

University Qom, Iran

Abstract:

To map the second layer of the network, we must use the vulnerability of internal
routing protocols to know what systems are served inside a router, these vulnerabilities
can be specified for the RIP protocol on port 520 and for OSPF on port 89 and only It
is enough to create a program to interact with these protocols using its client, the details
of which are available in the SCAPY library, as well as another protocol for mapping
and sending datagrams outside the network, such as ICMP and ARP protocols, which
are in the UDP segment. They are used.

In the network, we use authentication services to discover hosts under the data
link layer, and routing protocols for the
network layer, and cryptographic protocols for host authentication for the transmission
layer, all of which are included in the above. It can help us in identifying a host or
system, and the most important issue is sending datagrams to the selected route and

identifying many vulnerabilities that exist, it can help us in identifying the behavior of
a system, because for each port, a script for There is bypassing the authentication
process; In this article, we examine the set of techniques that lead to the identification
of IPs that feed from a router, system or modem. This method can be used in a global
network or a NAT.

Keywords:
NAT-SCAN decision tree, network scanner, external network mapping, vulnerability
of TCP/IP protocols

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