This document discusses firewalls and their types and functions. It defines a firewall as a system used to control access between trusted and untrusted networks using pre-configured rules. There are two main types of firewalls - hardware firewalls which are physical devices that protect entire networks, and software firewalls which are applications installed on individual computers. The document also outlines several firewall techniques including packet filtering, application gateways, circuit-level gateways, and bastion hosts. It provides examples of what personal firewalls can and cannot do to protect individual computers.
IP specifies the format of packets, also called #datagrams, and the addressing scheme. Most networks combine IP with a higher-level protocol called Transmission Control Protocol (TCP), which establishes a virtual connection between a destination and a source.
If you want to purchase the content e-mail me on dulith1989@gmail.com
IP specifies the format of packets, also called #datagrams, and the addressing scheme. Most networks combine IP with a higher-level protocol called Transmission Control Protocol (TCP), which establishes a virtual connection between a destination and a source.
If you want to purchase the content e-mail me on dulith1989@gmail.com
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.
Components of computer network
Network benefits
Disadvantages of computer network
Classification by their geographical area
Network classification by their component role
Types of servers
The term cyber security is used to refer to the security offered through on-line services to protect your online information.
With an increasing amount of people getting connected to Internet, the security threats that cause massive harm are increasing also.
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.
Components of computer network
Network benefits
Disadvantages of computer network
Classification by their geographical area
Network classification by their component role
Types of servers
The term cyber security is used to refer to the security offered through on-line services to protect your online information.
With an increasing amount of people getting connected to Internet, the security threats that cause massive harm are increasing also.
Практический семинар «Высокие технологии свободного общения. Решения в сфере объединенных коммуникаций».
Подробнее о мероприятии
Презентация Михаила Родионова, ведущего инженера департамента телекоммуникаций компании КРОК
Cyberoam offers next-generation firewall and UTM firewall that provide stateful and deep packet inspection for network, application and user identity-based security. Cyberoam firewall appliances provide ease of management and high security with flexibility.
The Firewall Policy Hangover: Alleviating Security Management MigrainesAlgoSec
The Firewall Policy Hangover: Alleviating Security Management Migraines provides a brief history of the evolution of firewalls, examines how complexity leads to misconfiguration risk and concludes with a discussion on firewall policy management best practices and real-life lessons learned. Additionally, this presentation shares research from “The State of Network Security 2012” that examines:
• the challenges of managing network security policies
• the impact of changing business requirements
• the benefits and limitations of emerging firewall technology
The slide show is about the Firewall , why we need firewall , its advantages, disadvantage and is common types - packet-filter firewall and proxy firewall .its working and advantages and didadvantages.
A firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. Packet filter is a hardware or software designed to block or allow transmission of packets based on criteria such as port, IP address, protocol.
This slide explains the design part as well as implementation part of the firewall. And also tells about the need of firewall and firewall capabilities.
Similar to Firewall and its types and function (20)
Inverter is a device which convert a DC input supply voltage into symmetric AC voltage of desired magnitude and frequency at the output side. It is also know as DC-AC converter.
Ideal and practical inverter have sinusoidal and no-sinusoidal waveforms at output respectively.
If the input dc is a voltage source, the inverter is called a Voltage Source Inverter (VSI). One can similarly think of a Current Source Inverter (CSI), where the input to the circuit is a current source. The VSI circuit has direct control over ‘output (ac) voltage’ whereas the CSI directly controls ‘output (ac) current.
Inverter is a device which convert a DC input supply voltage into symmetric AC voltage of desired magnitude and frequency at the output side. It is also know as DC-AC converter.
Ideal and practical inverter have sinusoidal and no-sinusoidal waveforms at output respectively.
If the input dc is a voltage source, the inverter is called a Voltage Source Inverter (VSI). One can similarly think of a Current Source Inverter (CSI), where the input to the circuit is a current source. The VSI circuit has direct control over ‘output (ac) voltage’ whereas the CSI directly controls ‘output (ac) current.
The commutator and brush arrangement is used to convert bidirectional internal current to unidirectional external current or vice versa.
The current flows through the brush mounted on the commutator.
The brushes are located at magnetic neutral axis which is midway between two adjacent poles.
Types of commutation:
Resistance commutation
Retarded commutation
Accelerated commutation
Sinusoidal commutation
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
2. Firewall
• Definition: A Network Firewall is a system or group
of systems used to control access between two
networks -- a trusted network and an untrusted
network -- using pre-configured rules or filters.
2
3. • Firewall is device that provides secure
connectivity between networks (internal/
external).
• It is used to implement and enforce a security
policy for communication between networks.
• A firewall may be a hardware, software or a
combination of both that is used to prevent
unauthorized program or internet users from
accessing a private network or a single computer.
3
4. • All messages entering or leaving the intranet pass
through the firewall, which examines each message
& blocks those that do not meet the specified
security criteria.
4
5. Why do we need a firewall?
• To protect confidential
information from those who do
not explicitly need to access it.
• To protect our network & its
resources from malicious users
& accidents that originate
outside of our network.
5
7. 1. Hardware Firewall
• It is a physical device.
• It can be installed between the
modem and computer.
• It can be incorporated into a
broadband router being used to
share the internet connection.
• Protects an entire network.
7
8. • Usually more expensive, harder to configure.
• E.g.- Cisco pix, Netscreen, Watchfuard etc.
8
9. 2. Software Firewall
• It is a software application.
• It is installed onto the computer system
that you wish to protect .
• Protects a single computer.
• This is usually the computer with
modem attached to it.
9
10. • Usually less expensive, easier to configure.
• E.g.- Norton internet security, MacAfee
internet security etc.
10
12. Packet filter
• It looks at each packet entering or leaving the
network and accepts or rejects it based on
user-defined rules.
12
13. • Packet filtering is fairly effective & transparent
to users, but it is difficult to configure.
• In addition, it is susceptible to IP spoofing.
13
14. Application gateway
• In such type of firewall remote host or
network can interact only with proxy server,
proxy server is responsible for hiding the
details of the internal network i.e. intranet.
• Users uses TCP/IP application, such as FTP &
Telnet servers.
14
15. • This is very effective, but can impose a
performance degradation.
15
16. Circuit – level Firewall
• This can be a stand – alone system or it can be a
specialized functions performed by an application –
level gateway for certain applications.
• It does not permit an end – to – end TCP
connection; rather, the gateway sets two TCP
connections.
• A typical use of the circuit – level gateway is a
situation in which the system administrator trusts
the internal users. 16
17. • The gateway can be configured to support
application level or proxy service on
inbound connections and circuit level
functions for outbound connections.
17
18. Bastion Host
• Bastion host is a special purpose computer on
a network specifically designed and
configured to withstand attacks.
18
19. • It generally hosts a single application, provides
platform for application gateway and circuit-
level gateway.
• It supports limited/specific applications to
reduce the threat to the computer.
• Include application-Telnet, SMTP, FTP
19
20. What a personal firewall can do
• Stop hackers from accessing your computer.
• Protect your personal information.
• Blocks “pop up” ads and certain cookies.
• Determines which programs can access the
internet.
• Block invalid packets. 20
21. What a personal firewall can not do
• Cannot prevent e-mail viruses
-only an antivirus product with update definitions
can prevent e-mail viruses.
• After setting it initially, you cannot forget about it
-The firewall will require periodic updates to the rule
sets and the software itself.
21