Analisis Penerapan Virtual Private Network Menggunakan Tools Hacking

2019 ◽  
Author(s):  
Amarudin ◽  
Sampurna Dadi Riskiono
Keyword(s):  
Denial Of Service ◽  
Virtual Private Network ◽  
Private Network

Akhir-akhir ini sudah mulai banyak perusahaan yang memanfaatkan protokol Virtual Private Network (VPN) sebagai media akses/komunikasi antar jaringan interlokal. VPN adalah sebuah protokol keamanan jaringan yang dapat digunakan sebagai salah satu cara untuk meningkatkan keamanan jaringan dari sisi transmisi data. Dengan pemanfaatan VPN, koneksi antar jaringan dapat terbentuk secara virtual walaupun tidak terbentuk secara fisik. Selain itu, dengan memanfaatkan protokol VPN, user (client) dapat mengkases Server secara private melalui jaringan public. Dengan demikian komunikasi antara Client dan Server terjaga dari Sniffing (penyadapan) dari pihak yang tidak bertanggung jawab. Akan tetap tingkat keamanan yang dihasilkan dari penerapan VPN ini perlu dilakukan pengkajian yang lebih dalam. Sehingga tingkat keamanannya dapat diketahui apakah sudah termasuk dalam kategori aman ataukah masih ada peluang bug yang membahayakan dari penetrasi. Dalam penelitian ini dilakukan pengujian Scanning dan Sniffing pada penerapan VPN menggunakan toos hacking yaitu Nmap dan Wireshark. Sedangkan pengujian performansi service pada VPN Server, dilakukan pengujian Denial of Service (DoS) menggunakan tools hacking yaitu LOIC. Adapun objek penelitian ini adalah perangkat Mikrotik RouterOS yang digunakan pada Universitas Teknokrat Indonesia. Hasil penelitian yang didapatkan bahwa komunikasi data antar jaringan (antara VPN Server dan VPN Client) dapat terenkripsi dengan baik. Akan tetapi dari segi konektifitas antar jaringan sangat dipengaruhi oleh performansi bandwidth yang digunakan oleh sistem jaringan tersebut. Selain itu berdasarkan hasil pengujian performansi service pada VPN Server didapatkan hasil bahwa service pada VPN Server dapat dimatikan pada request (ping) sebesar 1.899.276 request. Hal ini dipengaruhi oleh spesifikasi perangkat Mikrotik RouterOS yang digunakan. Adapun untuk penelitian selanjutnya perlu dilakukan pengujian performansi konektifitas menggunakan bandwith yang lebih besar dan untuk menguji performansi service VPN Server menggunakan spesifikasi perangkat Mikrotik yang lebih baik.

scholarly journals A Remote Access Security Model based on Vulnerability Management

2020 ◽  
Vol 12 (5) ◽  
pp. 38-51
Author(s):  
Samuel Ndichu ◽  
◽  
Sylvester McOyowo ◽  
Henry Okoyo ◽  
Cyrus Wekesa
Keyword(s):  
Communication Networks ◽  
Detection System ◽  
Denial Of Service ◽  
Virtual Private Network ◽  
Remote Access ◽  
Security Model ◽  
Public Networks ◽  
Vulnerability Management ◽  
Private Network ◽  
Access Security

Information security threats exploit vulnerabilities in communication networks. Remote access vulnerabilities are evident from the point of communication initialization following the communication channel to data or resources being accessed. These threats differ depending on the type of device used to procure remote access. One kind of these remote access devices can be considered as safe as the organization probably issues it to provide for remote access. The other type is risky and unsafe, as they are beyond the organization’s control and monitoring. The myriad of devices is, however, a necessary evil, be it employees on public networks like cyber cafes, wireless networks, vendors support, or telecommuting. Virtual Private Network (VPN) securely connects a remote user or device to an internal or private network using the internet and other public networks. However, this conventional remote access security approach has several vulnerabilities, which can take advantage of encryption. The significant threats are malware, botnets, and Distributed Denial of Service (DDoS). Because of the nature of a VPN, encryption will prevent traditional security devices such as a firewall, Intrusion Detection System (IDS), and antivirus software from detecting compromised traffic. These vulnerabilities have been exploited over time by attackers using evasive techniques to avoid detection leading to costly security breaches and compromises. We highlight numerous shortcomings for several conventional approaches to remote access security. We then adopt network tiers to facilitate vulnerability management (VM) in remote access domains. We perform regular traffic simulation using Network Security Simulator (NeSSi2) to set bandwidth baseline and use this as a benchmark to investigate malware spreading capabilities and DDoS attacks by continuous flooding in remote access. Finally, we propose a novel approach to remote access security by passive learning of packet capture file features using machine learning and classification using a classifier model.

scholarly journals QoS Design Consideration for Enterprise and Provider’s Network at Ingress and Egress Router for VoIP protocols

2016 ◽  
Vol 6 (1) ◽  
pp. 235
Author(s):  
Manjur Kolhar ◽  
Mosleh M Abualhaj ◽  
Faiza Rizwan
Keyword(s):  
Denial Of Service ◽  
Service Level Agreement ◽  
Service Level ◽  
Virtual Private Network ◽  
Multiprotocol Label Switching ◽  
Service Levels ◽  
Sla Violation ◽  
Mpls Vpn ◽  
End To End ◽  
Private Network

Compliance with the Service Level Agreement (SLA) metric is a major challenge in a Multiprotocol Label Switching Virtual Private Network (MPLS VPN) because mandatory models must be maintained on both sides of the MPLS VPN in order to achieve end-to-end service levels. The end-to-end service of an MPLS VPN can be degraded owing to various issues such as distributed denial of service (DDoS), and Random Early Detection (RED) that prevents congestion and differentiates between legitimate and illegitimate user traffic. In this study, we propose a centralized solution that uses a SLA Violation Detector (SLAVD) and intrusion detection to prevent SLA violation.

QoS Design Consideration for Enterprise and Provider’s Network at Ingress and Egress Router for VoIP protocols

2016 ◽  
Vol 6 (1) ◽  
pp. 235
Author(s):  
Manjur Kolhar ◽  
Mosleh M Abualhaj ◽  
Faiza Rizwan
Keyword(s):  
Denial Of Service ◽  
Service Level Agreement ◽  
Service Level ◽  
Virtual Private Network ◽  
Multiprotocol Label Switching ◽  
Service Levels ◽  
Sla Violation ◽  
Mpls Vpn ◽  
End To End ◽  
Private Network

Compliance with the Service Level Agreement (SLA) metric is a major challenge in a Multiprotocol Label Switching Virtual Private Network (MPLS VPN) because mandatory models must be maintained on both sides of the MPLS VPN in order to achieve end-to-end service levels. The end-to-end service of an MPLS VPN can be degraded owing to various issues such as distributed denial of service (DDoS), and Random Early Detection (RED) that prevents congestion and differentiates between legitimate and illegitimate user traffic. In this study, we propose a centralized solution that uses a SLA Violation Detector (SLAVD) and intrusion detection to prevent SLA violation.

RANCANG BANGUN KEAMANAN TRANSFER DATA VOIP OVER VPN PADA SISTEM OPENSOURCE TRIXBOX

2014 ◽  
Vol 11 (1) ◽  
Author(s):  
I Wayan Eka Putra Darmawan
Keyword(s):  
Internet Protocol ◽  
Virtual Private Network ◽  
Transfer Data ◽  
Virtual Channels ◽  
End To End ◽  
Private Network

VoIP (Voice over Internet) dikenal juga dengan sebutan IP (Internet Protocol) Telephony saat ini semakin banyak digunakan karena memiliki beberapa keunggulan, salah satu diantaranya yaitu tarif yang jauh lebih murah daripada tarif telepon tradisional sehinggapengguna telepon dapat memilih layanan tersebut sesuai dengan kebutuhannya. VoIP dapat mereduksi biaya percakapan sampai 70%. Selain memiliki beberapa keunggulan di atas,VoIP juga memiliki kelemahan yang sangat vital yaitu dari segi keamanan transfer suarakarena berbasis IP, sehingga siapapun bisa melakukan penyadapan dan perekaman terhadap data VoIP. Ganguan yang terjadi pada sistem VoIP ada berbagai macam diantaranya, transferdata yang lewat pada suatu jaringan seperti misalnya dapat disalahgunakan (abuse), dapatdibajak isi data tersebut (sniffing), dan tidak dapat mengakses server dikarenakan server yang kelebihan muatan (Denial of Services).Ada beberapa cara untuk mengamankan komunikasi data VoIP, antara lain, dengan mengamankan jalur yang digunakan pengguna untuk melakukan komunikasi VoIP denganmenggunakan metode VPN (Virtual Private Network) dan juga dapat dilakukan suatu metode kriptografi pada aplikasi VoIP tersebut sehingga data yang dikirimkan dapat dilindungidengan baik. VPN adalah teknik pengaman jaringan yang bekerja dengan cara membuat suatu tunnel sehingga jaringan yang dipercaya dapat menghubungkan jaringan yang ada diluar melalui internet. Titik akhir dari VPN adalah tersambungnya Virtual Channels (VCs)dengan cara pemisahan. Kenyataannya koneksi sebuah end-to-end VPN tergantung dari sebuah nilai dari hubungan daripada titik-titiknya. VPN mempunyai dua metode dalampengamanan yakni IPSec dan Crypto IP Encapsulation (CIPE). Selain itu dapat dipergunakan teknik Kriptografi (cryptography) yang merupakan ilmu dan seni penyimpanan pesan, data,atau informasi secara aman.Sistem VoIP menggunakan VPN ini diharapkan dapat memberikan keamanan transfer data pada jaringan internet maupun intranet.

Analisis Performa Site to Site IP Security Virtual Private Network (VPN) Menggunakan Algoritma Enkripsi ISAKMP

2019 ◽  
Vol 7 (2) ◽  
pp. 129
Author(s):  
Firmansyah Firmansyah ◽  
Mochamad Wahyudi ◽  
Rachmat Adi Purnama
Keyword(s):  
Virtual Private Network ◽  
Private Network

Organic Techniques for Protecting Virtual Private Network (VPN) Services from Access Link Flooding Attacks

2002 ◽  
Author(s):  
Ranga S. Ramanujan ◽  
Doug Harper ◽  
Maher Kaddoura ◽  
David Baca ◽  
John Wu ◽  
...  
Keyword(s):  
Virtual Private Network ◽  
Flooding Attacks ◽  
Private Network ◽  
Access Link

Virtual Private Network Flow Detection in Wireless Sensor Networks using Machine Learning Techniques

2021 ◽  
Vol 10 ◽  
Author(s):  
S. Phani Praveen ◽  
T. Bala Murali Krishna ◽  
Sunil K. Chawla ◽  
CH Anuradha
Keyword(s):  
Machine Learning ◽  
Traffic Flow ◽  
Network Flow ◽  
Virtual Private Network ◽  
Machine Learning Techniques ◽  
Protocol Security ◽  
Learning Techniques ◽  
Private Network ◽  
Hyper Text Transfer Protocol ◽  
Transfer Protocol

Background: Every organization generally uses a VPN service individually to leather the actual communication. Such communication is actually not allowed by organization monitoring network. But these institutes are not in a position to spend huge amount of funds on secure sockets layer to monitor traffic over their computer networks. Objective: Our work suggests simple technique to block or detect annoying VPN clients inside the network activities. This method does not requires the network to decrypt or even decode any network communication. Method: The proposed solution selects two machine learning techniques Feature Tree and K-means as classifiction techniques which work on time related features. First, the DNS mapping with the ordinary characteristic of the transmission control protocol / internet protocol computer network stack is identified and it is not to be considered as a normal traiffic flow if the domain name information is not available. The process also examines non-standard utilization of hyper text transfer protocol security and also conceal such communication from hyper text transfer protocol security dependent filters in firewall to detect as anomaly in largely. Results: we define the trafic flow as normal trafic flow and VPN traffic flow. These two flows are characterized by taking two machine learning techniques Feature Tree and K-means. We have executed each experment 4 times. As a result, eight types of regular traffics and eight types of VPN traffics were represented. Conclusion: Once trafic flow is identified, it is classified and studied by machine learning techniques. Using time related features, the traffic flow is defined as normal flow or VPN traffic flow.

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