MENGENAL KONSEP GATEWAY DAN NAT (NETWORK ADDRESS TRANSLATION)

Gateway atau yang sering disebut juga dengan “Gerbang Jaringan” merupakan sebuah perangkat yang dapat memudahkan pengguna computer dan internet. Contoh penggunaan Gateway yang dapat kita lihat adalah pada Email. Seiring dengan semakin merebaknya penggunaan internet pengertian Gateway pun sering mengalami pegeseran makna. Banyak orang yang menyamakan Gateway dengan Router, tapi sebenarnya keduanya adalah perangkat yang berbeda. Gateway dapat digunakan dalam menghubungkan IBM SNA dengan digital SNA, Local Area Network (LAN) dengan Wide Area Network (WAN). NAT (Network Address Translation) adalah sebuah proses pemetaan alamat IP dimana perangkat jaringan computer akan memberikan alamat IP Public ke perangkat jaringan local sehingga banyak IP Private yang dapat mengakses IP Public.

MENGENAL KONSEP GATEWAY DAN NAT (NETWORK ADDRESS TRANSLATION)

Gateway atau yang sering disebut juga dengan “Gerbang Jaringan” merupakan sebuah perangkat yang dapat memudahkan pengguna computer dan internet. Contoh penggunaan Gateway yang dapat kita lihat adalah pada Email. Seiring dengan semakin merebaknya penggunaan internet pengertian Gateway pun sering mengalami pegeseran makna. Banyak orang yang menyamakan Gateway dengan Router, tapi sebenarnya keduanya adalah perangkat yang berbeda. Gateway dapat digunakan dalam menghubungkan IBM SNA dengan digital SNA, Local Area Network (LAN) dengan Wide Area Network (WAN). NAT (Network Address Translation) adalah sebuah proses pemetaan alamat IP dimana perangkat jaringan computer akan memberikan alamat IP Public ke perangkat jaringan local sehingga banyak IP Private yang dapat mengakses IP Public.

NAT++: An Efficient Micro-NAT Architecture for Solving IP-Spoofing Attacks in a Corporate Network

The Internet Protocol (IP) version 4 (IPv4) has several known vulnerabilities. One of the important vulnerabilities is that the protocol does not validate the correctness of the source address carried in an IP packet. Users with malicious intentions may take advantage of this vulnerability and launch various attacks against a target host or a network. These attacks are popularly known as IP Address Spoofing attacks. One of the classical IP-spoofing attacks that cost several million dollars worldwide is the DNS-amplification attack. Currently, the availability of solutions is limited, proprietary, expensive, and requires expertise. The Internet is subjected to several other forms of amplification attacks happening every day. Even though IP-Spoofing is one of the well-researched areas since 2005, there is no holistic solution available to solve this problem from the gross-root. Also, every solution assumes that the attackers are always from outside networks. In this paper, we provide an efficient and scalable solution to solve the IP-Spoofing problem that arises from malicious or compromised inside hosts. We use a modified form of Network Address Translation (NAT) to build our solution framework. We call our framework as NAT++. The proposed infrastructure is robust, crypto-free, and easy to implement. Our simulation results have shown that the proposed NAT++ infrastructure does not consume more than the resources required by a simple NAT.

Implementation of Network Address Translation Using TCP/IP Model In Internet Communication System

Nowadays, many people will be used internet that for their work, communication, education, economic and organization necessary that is used today. Network address translation (NAT) is a method of remapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. A network is a system of hardware and software, put together for the purpose of communication and resource sharing. A network includes transmission hardware devise to interconnect transmission media and to control transmissions and software to decode and format data. The Internet protocol suite is the computer networking model and set of communications protocols used on the Internet and similar computer networks. Knowledge on how the internet is able to communicate with internet users is a mystery to some people. Internet communication need to be TCP/IP protocol which means that TCP is Transmission Control Protocol, or what is sometimes simply used to refer to Internet Protocol, is the basic unit for communication on the internet. This can also be applied to private internet, like Ethernet and so on. Despite TCP and IP being used interchangeably, there is a slight difference between the two in relation to the roles they play IP is directly responsible for obtaining internet addresses and then it is the work of TCP to deliver the data obtained to the addresses achieved by IP. TCP/IP provides end-to-end connectivity specifying how data should be packetized, addressed, transmitted, routed and received at the destination. This paper aim is described operation and models of TCP-IP suite in data communication network.

Perancangan Network Address Translation (NAT)

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