VPN allows organizations to connect remote sites and users over a shared public network while maintaining privacy and security. It uses encryption, authentication, and tunneling protocols to create a secure connection between devices. VPNs can extend an organization's intranet to remote offices, partners, suppliers and customers. They reduce costs compared to dedicated private networks. However, VPNs still face security risks from hacking attacks, weak authentication, client-side vulnerabilities, and malware infections that could compromise the private network. Proper firewalls, encryption, authentication and other security measures are needed to ensure VPN safety.
A VPN (Virtual Private Network) extends a private network across a public network, such as the
Internet.
A VPN is a network that uses a public telecommunication infrastructure, such as the Internet, to provide
remote offices or individual users with secure access to their organization's network. A VPN ensures
privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol
(L2TP). Data is encrypted at the sending end and decrypted at the receiving end.
A VPN (Virtual Private Network) extends a private network across a public network, such as the
Internet.
A VPN is a network that uses a public telecommunication infrastructure, such as the Internet, to provide
remote offices or individual users with secure access to their organization's network. A VPN ensures
privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol
(L2TP). Data is encrypted at the sending end and decrypted at the receiving end.
A technology that creates a network that is physically public, but virtually private
That is a Secure way of adding an extra level of privacy to your online activity Like web surfing.
Knowledge Base - Why use a Virtual Private Network (VPN) presented by Devolutions, leader in remote desktop management solutions.
Check out http://remotedesktopmanager.com/
A virtual private network gives secure access to LAN resources over a shared network infrastructure such as the internet. It can be conceptualized as creating a tunnel from one location to another, with Encrypted data traveling through the tunnel before being decrypted at its destination.
Virtual private network feature and benefitsAnthony Daniel
Cyberoam VPN offers the option of IPSec VPN, SSL VPN, LT2P, PPTP on the UTM appliances, providing secure remote access to organizations. It replaces most other best-of-breed firewall-VPN appliances to offer cost-effective security to organizations.
A technology that creates a network that is physically public, but virtually private
That is a Secure way of adding an extra level of privacy to your online activity Like web surfing.
Knowledge Base - Why use a Virtual Private Network (VPN) presented by Devolutions, leader in remote desktop management solutions.
Check out http://remotedesktopmanager.com/
A virtual private network gives secure access to LAN resources over a shared network infrastructure such as the internet. It can be conceptualized as creating a tunnel from one location to another, with Encrypted data traveling through the tunnel before being decrypted at its destination.
Virtual private network feature and benefitsAnthony Daniel
Cyberoam VPN offers the option of IPSec VPN, SSL VPN, LT2P, PPTP on the UTM appliances, providing secure remote access to organizations. It replaces most other best-of-breed firewall-VPN appliances to offer cost-effective security to organizations.
Overview of VPN protocols.
VPNs (Virtual Private Networks) are often viewed from the perspective of security with the goal of providing authentication and confidentiality.
However, the primary purpose of VPNs is to connect 2 topologically separated private networks over a public network (typically the Internet).
VPNs basically hook a network logically into another network so that both appear as one private local network.
Security is a possible add-on to VPNs. In many cases it makes perfectly sense to secure the VPNs communication over the unsecure public network.
VPN protocols typically employ a tunnel where data packets of the local network are encapsulated in an outer protocol for transmission over the public network.
The most important VPN protocols are IPSec, PPTP and L2TP. In recent years SSL/TLS based VPNs such as OpenVPN have gained widespread adoption.
Describe the major types of VPNs and technologies- protocols- and serv.docxearleanp
Describe the major types of VPNs and technologies, protocols, and services used to deploy VPNs. Also describe the business benefits of VPNs.
Solution
A virtual private network (VPN) is a technology that creates an encrypted connection over a less secure network. The benefit of using a VPN is that it ensures the appropriate level of security to the connected systems when the underlying network infrastructure alone cannot provide it. The justification for using a VPN instead of a private network usually boils down to cost and feasibility: It is either not feasible to have a private network (e.g., for a traveling sales rep) or it is too costly to do so. The most common types of VPNs are remote-access VPNs and site-to-site VPNs
A remote-access VPN uses a public telecommunication infrastructure like the Internet to provide remote users secure access to their organization\'s network. A VPN client on the remote user\'s computer or mobile device connects to a VPN gateway on the organization\'s network, which typically requires the device to authenticate its identity, then creates a network link back to the device that allows it to reach internal network resources (e.g., file servers, printers, intranets) as though it was on that network locally. A remote-access VPN usually relies on either IPsec or SSL to secure the connection, although SSL VPNs are often focused on supplying secure access to a single application rather than to the whole internal network. Some VPNs provide Layer 2access to the target network; these require a tunneling protocol like PPTP or L2TP running across the base IPsec connection.
A site-to-site VPN uses a gateway device to connect the entire network in one location to the network in another, usually a small branch connecting to a data center. End-node devices in the remote location do not need VPN clients because the gateway handles the connection. Most site-to-site VPNs connecting over the Internet use IPsec. It is also common to use carrier MPLS clouds rather than the public Internet as the transport for site VPNs. Here, too, it is possible to have either Layer 3 connectivity (MPLS IP VPN) or Layer 2 (Virtual Private LAN Service, or VPLS) running across the base transport.
VPNs can also be defined between specific computers, typically servers in separate data centers, when security requirements for their exchanges exceed what the enterprise network can deliver. Increasingly, enterprises also use VPNs in either remote-access mode or site-to-site mode to connect (or connect to) resources in a public infrastructure as a service environment. Newer hybrid-access scenarios put the VPN gateway itself in the cloud, with a secure link from the cloud service provider into the internal network.
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Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
As Europe's leading economic powerhouse and the fourth-largest hashtag#economy globally, Germany stands at the forefront of innovation and industrial might. Renowned for its precision engineering and high-tech sectors, Germany's economic structure is heavily supported by a robust service industry, accounting for approximately 68% of its GDP. This economic clout and strategic geopolitical stance position Germany as a focal point in the global cyber threat landscape.
In the face of escalating global tensions, particularly those emanating from geopolitical disputes with nations like hashtag#Russia and hashtag#China, hashtag#Germany has witnessed a significant uptick in targeted cyber operations. Our analysis indicates a marked increase in hashtag#cyberattack sophistication aimed at critical infrastructure and key industrial sectors. These attacks range from ransomware campaigns to hashtag#AdvancedPersistentThreats (hashtag#APTs), threatening national security and business integrity.
🔑 Key findings include:
🔍 Increased frequency and complexity of cyber threats.
🔍 Escalation of state-sponsored and criminally motivated cyber operations.
🔍 Active dark web exchanges of malicious tools and tactics.
Our comprehensive report delves into these challenges, using a blend of open-source and proprietary data collection techniques. By monitoring activity on critical networks and analyzing attack patterns, our team provides a detailed overview of the threats facing German entities.
This report aims to equip stakeholders across public and private sectors with the knowledge to enhance their defensive strategies, reduce exposure to cyber risks, and reinforce Germany's resilience against cyber threats.
Levelwise PageRank with Loop-Based Dead End Handling Strategy : SHORT REPORT ...Subhajit Sahu
Abstract — Levelwise PageRank is an alternative method of PageRank computation which decomposes the input graph into a directed acyclic block-graph of strongly connected components, and processes them in topological order, one level at a time. This enables calculation for ranks in a distributed fashion without per-iteration communication, unlike the standard method where all vertices are processed in each iteration. It however comes with a precondition of the absence of dead ends in the input graph. Here, the native non-distributed performance of Levelwise PageRank was compared against Monolithic PageRank on a CPU as well as a GPU. To ensure a fair comparison, Monolithic PageRank was also performed on a graph where vertices were split by components. Results indicate that Levelwise PageRank is about as fast as Monolithic PageRank on the CPU, but quite a bit slower on the GPU. Slowdown on the GPU is likely caused by a large submission of small workloads, and expected to be non-issue when the computation is performed on massive graphs.
3. A virtual private network can be contrasted with an
expensive system of owned or leased lines that can
only be used by one organisation.
The goal of a VPN is to provide the organisation with
the same capabilities, but at a much lower cost.
4. A VPN works by using the shared public
infrastructure while maintaining privacy through
security procedures and tunnelling protocols.
In effect, the protocols, by encrypting data at the
sending end and decrypting it at the receiving end,
send the data through a “tunnel” that cannot be
“entered” by data that is not properly generated.
An additional level of security involves encrypting not
only the data, but also the originating and receiving
network addresses.
10. Router/Firewall initiated VPN
For site to site connectivity - internets and extranets.
POP
Internet
Remote Router or Firewall Initiated
POP
IPSec
Encrypted
Tunnel
Router/Firewall-Initiated VPNRouter/Firewall-Initiated VPN
11.
12. Benefits of VPN
Extend geographic connectivity
Improve security
Reduce operational costs versus traditional WAN.
Reduce transit time and transportation cost for remote users.
Improve Productivity
Simplify network
Provides global networking opportunities
Easy to configure
Provide telecommuter support
Used to access BLOCKED websites
15. A well-designed VPN uses several
methods for keeping your connection
and data secure:
Fire walls
Encryption
Sec
AAA server
16. VPN uses encryption to provide the data confidentiality.
Once connected, the VPN makes use of the tunnelling
mechanism to encapsulate encrypted data into a secure
tunnel, with openly read headers, which can cross the
public networks.
VPN also provides the data integrity check.This is typically
performed using a message digest to ensure that the data
has not been tampered with during transmission.
VPN Security
17. Firewalls
Provides a strong barrier
between your private
network and the internet.
You can set firewalls to
restrict the numbers of
ports, what types of
packets are passed
through and which
protocols are allowed
through.
18. Encryption
Process of taking all the
data that one computer
is sending to another
and encoding it into a
form that only the other
computer will be able to
decode.
20. Creating Dial up VPN on
windows server 2008R2
Conditions:
>IP address should be static
>firewall should be turned off
> computers must be in a network
>domain should be built already
Go to server manager, install the RRAS
role from the Administrative tools.
Follow the onscreen instructions with a
desired choice of options as according
you want to build the VPN.
22. Hacking Attacks
VPN Hijacking is the unauthorised take-over of an
established VPN connection from a remote client, and
impersonating that client on the connecting network.
Man-in-Middle attacks affect traffic being sent between
communicating parties , and can include interception,
insertion, deletion, and modification of messages,
reflecting messages back at the sender, repaying old
messages and redirecting messages.
23. User Authentication
By default, VPN does not provide/enforce strong user
authentication. A VPN connection should only be
established by an authenticated user. If the
authentication is not strong enough to restrict
unauthorised access, an unauthorised party could
access the connected network and its resources. Most
VPN implementations provide limited authentications
methods. For example, PAP, used in PPTP, transports
both username and password in clear text. A third party
could capture this information and use it to gain
subsequent access to the network.
24. Client-Side risks
The VPN client machines of, say, home users may be
connected to the Internet via a standard broadband
connection while at the same time holding a VPN connection
to a private network, using split tunnelling. This may pose a
risk to the private network being connected to.
A client machine may also be shared with other parties who
are not fully aware of the security implications. In addition, a
laptop used by a mobile user may be connected to the
Internet, a wireless LAN at a hotel, airport or on other foreign
networks. However, the security protection in most of these
public connection points is inadequate for VPN access. If the
VPN client machine is compromised, either before or during
the connection, this poses a risk to the connecting network.
25. Virus/ Malware Infections
A connecting network can be compromised if the client
side is infected with a virus. If a virus or spyware
infects a client machine, there is chance that the
password for the VPN connection might be leaked to
an attacker. In the case of an intranet or extranet VPN
connection, if one network is infected by a virus or
worm, that virus / worm can be spread quickly to other
networks if anti-virus protection systems are ineffective.
26. Conclusion
VPN provides a means of accessing a secure, private,
internal network over insecure public networks such as
the Internet. A number of VPN technologies have been
outlined, among which IPsec and SSL VPN are the
most common. Although a secure communication
channel can be opened and tunnelled through an
insecure network via VPN, client side security should
not be overlooked.