What is Firewall ?

What is Firewall ?
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1 Answer

Answer :

Every computer or network has its own security system. No one can break through this wall. This invisible wall of security is called fire wall.
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Related questions

Could someone give me a step by step guide for using my windows firewall (or something that will do the job) to block certain programs from transferring and receiving data across the web?

Description : Could someone give me a step by step guide for using my windows firewall (or something that will do the job) to block certain programs from transferring and receiving data across the web?

Last Answer : Download and install comodo internet security After installation, open it, go to the “firewall” tab, click “define new blocked application”, select -> browse, then select the executable file you want to block, -> click “apply” -> done

Should I put my Xbox in the DMZ, or entirely behind the firewall, or does it make no difference at all?

Description : Should I put my Xbox in the DMZ, or entirely behind the firewall, or does it make no difference at all?

Last Answer : I DMZ my Xbox to connect to my friends, although from what I hear, it’s not exactly a good thing to do. It’s the only solution that I’m smart enough to figure out. I tried port forwarding but had no idea what I was doing. Then again, I’m not a network guru or anything…

If my DDWRT SPI firewall is enabled on the router, do I need to also engage the Windows (or another) firewall?

Description : If my DDWRT SPI firewall is enabled on the router, do I need to also engage the Windows (or another) firewall?

Last Answer : Here’s good article on this topic why you need separate firewall on how to geek

A question for Computer Scientists: How feasible is an "offensive firewall"?

Description : A question for Computer Scientists: How feasible is an "offensive firewall"?

Last Answer : answer:Very feasible, you can fire off just about anything you want with existing firewalls and software for whatever conditions you want to look for. But it has the same risk/reward as any attack. You don’t get a pass for attacking a government network because they probed your network first.

What is the "core networking" in my firewall exceptions list, and should it be checkmarked?

Description : What is the "core networking" in my firewall exceptions list, and should it be checkmarked?

Last Answer : Each Windows Firewall exception is involved with some bit of functionality that you will lose if they are turned off. Basic TCP/IP traffic such as DHCP, DNS, ICMP, Group Policy, and so on are supported ... rule group are disabled, your machine can't talk on the network. Make sure that it's enabled.

Why isn't my linux firewall opening ports?

Description : Why isn't my linux firewall opening ports?

Last Answer : I’m not sure what Linux distribution you’re using and I don’t have that much experience with firewalls, and especially not with command line firewalls, but Ubuntu includes “ufw” which supposedly is a far easier front-end to iptables which you might find easier too.

Windows XP firewall won't turn on?

Description : Windows XP firewall won't turn on?

Last Answer : Bazooooooooooooooooooooooooooooooooooooooooooooooka to M$ should help with things .

Help with Webroot Desktop Firewall?

Description : Help with Webroot Desktop Firewall?

Last Answer : I reached my question asking max, but I have a URGENT question: I have the TRIAL for webroot anti-virus, and its telling my I cant quarantine my items because its a trial. I HAVE 2 VIRUSES, ... I'll proabably buy the program tommorow, but I cannot leave the viruses on my computer until then! HELP!

Experienced PC security enthusiasts: What AV/Firewall/Spyware combo have you found to offer the best protection?

Description : Experienced PC security enthusiasts: What AV/Firewall/Spyware combo have you found to offer the best protection?

Last Answer : I use PCTools Firewall and AntiVirus, as well as ThreatFire and Ad-Aware. So far so good. I’ve been through dozens of FW and AV programs, and I could easily tell you which ones DON’T work. Anything made/sold/offered by Symantec

What is the best anti-virus/anti-spyware/anti-hacking & firewall program (free or not free) out there for APPLE MAC?

Description : What is the best anti-virus/anti-spyware/anti-hacking & firewall program (free or not free) out there for APPLE MAC?

Last Answer : OSX. There are still 0 confirmed viruses for Macs running OSX. There are a couple Trojans, apparently, but you’d have to go looking for them to find them – and be pretty stupid to actually get infected by them. So, I wouldn’t consider it a problem worth worrying about on a Mac. Enjoy!

Firewall: (a) Amplifies weak outgoing signals to stronger ones -Technology

Description : Firewall: (a) Amplifies weak outgoing signals to stronger ones -Technology

Last Answer : (d) A firewall can either be software based or hardware based and is used to prevent intruders from accessing your system.

What is a firewall? -Technology

Description : What is a firewall? -Technology

Last Answer : A firewall is a program or hardware device that filters the information coming through an internet connection to a network or computer system. If incoming information does not pass the rules stored in the firewall, it is not allowed through.

What is a firewall? -Technology

Description : What is a firewall? -Technology

Last Answer : A firewall is a program or hardware device that filters the information coming through an internet connection to a network or computer system. If incoming information does not pass the rules stored in the firewall, it is not allowed through.

Where can I block outbound traffic to different IP addresses in Kaspersky Total Security Firewall?

Description : I found this in the Package Rules menu:

Last Answer : answer:

Is Windows Firewall enough as an antivirus program?

Description : Or is it good to install another one? I'm sorry, but it's my first computer, so I'm asking.

Last Answer : FireWall is not an antivirus. Download and install a real antivirus - I use Avast! free version (http://www.avast.com/cs-cz/download-thank-you.php?product=FAV-ONLINE&locale=cs-cz), but you will definitely get recommendations for others ...: o

What does Firewall do in PC?

Description : Is it important to have it turned on?

Last Answer : Yes, the Firewall should be turned on, its task is to protect the internal network from attacks from nearby networks.

Which is the best real time firewall plugin for wordpress file uploads?

Description : Which is the best real time firewall plugin for wordpress file uploads?

Last Answer : Sucuri Security – Auditing, Malware Scanner and Security Hardening. iThemes Security. Wordfence Security. WP fail2ban. All In One WP Security & Firewall. Jetpack. SecuPress. BulletProof Security.

What is value of using access control database transaction and firewall log files?

Description : What is value of using access control database transaction and firewall log files?

Last Answer : Need answer

Should i turn on my home computer firewall?

Description : Should i turn on my home computer firewall?

Last Answer : You should always have a firewall program running. Anti-virusprograms can only do so much !

The Importance Of Good Firewall Protection?

Description : The Importance Of Good Firewall Protection?

Last Answer : There's an old saying that an ounce of prevention is worth apound of cure. This is never demonstrated so convincingly as it isin the case of the internet firewall. This type of ... upload somethingmalicious to destroy your computer.A firewall is one of the first applications that should bein

How to Install a Firewall Appliance?

Description : How to Install a Firewall Appliance?

Last Answer : Just like locks and burglar alarms are important for protectingyour home, a firewall is an integral part of protecting yournetwork and servers. If you're housing a lot of data for yourworkplace or just ... a little higher in price as well. Make sureyou stick with reputable brands, also, because y

Who are the top firewall software manufacturers?

Description : Who are the top firewall software manufacturers?

Last Answer : Norton and McAfree are top firewall software manufacturers. You can read reviews and the products at personal-firewall-software-review.toptenreviews.com

Does a Network Bridge have it's own hardware firewall like a router?

Description : Does a Network Bridge have it's own hardware firewall like a router?

Last Answer : A network bridge usually doesn't come with a firewall, just the router.

Does a Network Hub have a hardware firewall?

Description : Does a Network Hub have a hardware firewall?

Last Answer : Some network hubs have them installed for protection

How effective is a firewall protection?

Description : How effective is a firewall protection?

Last Answer : A strong and upgraded firewall protection acts as a virtual barrier that defends external and internal damages from cyber attacks. Installing a powerful firewall protection on your system or network, provides ... on a network. A network-based firewall is also referred as a virtual firewall service.

Use A Firewall To Keep Hackers Out?

Description : Use A Firewall To Keep Hackers Out?

Last Answer : There are always hackers who are looking for ways to get into any exchange serve that they think they can access. You need to keep them out at all times, especially if this server is located at a ... not have the right access codes. It can also block automated programs that hackers may have set up.

Does ZoneAlarm free firewall really work?

Description : Does ZoneAlarm free firewall really work?

Last Answer : ZoneAlarm Free Firewall has it's own website for you to explore. There is alot of information provided on the website which should be able to answer any questions that you have. Go to www.zonealarm.com and download the software for free and give it a try.

What is a firewall?

Description : What is a firewall?

Last Answer : Firewall is a network security system which helps in protecting your network from unauthorized accesses. It averts malignant access from computers outside the network. A firewall also works when you want ... and can be later customized as per needs for getting control over features and security. 

What do you mean by a Firewall?

Description : What do you mean by a Firewall?

Last Answer : Firewall is a concept of a security system that will helps computers to protect it with unauthorized access or any cyber-attack.

Smart card is better protected than other card using a) Encryption b) Firewall c) Hub d) All of the above

Description : Smart card is better protected than other card using a) Encryption b) Firewall c) Hub d) All of the above

Last Answer : a) Encryption

Who protects system from external threat? a) EDI b) ERP c) Firewall d) Script kiddies

Description : Who protects system from external threat? a) EDI b) ERP c) Firewall d) Script kiddies

Last Answer : c) Firewall

Which will not harm computer resources? a) Virus b) Trojan horse c) Firewall d) None of the above

Description : Which will not harm computer resources? a) Virus b) Trojan horse c) Firewall d) None of the above

Last Answer : c) Firewall

Which of the following is a useful security mechanism when considering business strategy and IT? a. Encryption b. Decryption c. firewall d. all the above

Description : Which of the following is a useful security mechanism when considering business strategy and IT? a. Encryption b. Decryption c. firewall d. all the above

Last Answer : d. all the above

Which of the following is a useful security mechanism when considering business strategy and IT? a. Encryptionb. Decryption c. firewall d. all the above

Description : Which of the following is a useful security mechanism when considering business strategy and IT? a. Encryptionb. Decryption c. firewall d. all the above

Last Answer : d. all the above

A packet filtering firewall can a. deny certain users from accessing a service b. block worms and viruses from entering the network c. disallow some files from being accessed through FTP d. block some hosts from accessing the network

Description : A packet filtering firewall can a. deny certain users from accessing a service b. block worms and viruses from entering the network c. disallow some files from being accessed through FTP d. block some hosts from accessing the network

Last Answer : d. block some hosts from accessing the network

A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT a. block entire HTTP traffic during 9:00PM and 5 :0OAM b. block all ICMP trafficc. stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address d. block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM

Description : A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT a. block entire HTTP traffic during 9:00PM and 5 :0OAM b. block all ICMP traffic c. stop ... address d. block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM

Last Answer : d. block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM

A _____ should be considered as a means to divide the world into two or more networks: one or more secure networks and one or more non-secure networks. A. firewall B. ESP C. SSL D. both a and b

Description : A _____ should be considered as a means to divide the world into two or more networks: one or more secure networks and one or more non-secure networks. A. firewall B. ESP C. SSL D. both a and b

Last Answer : A. firewall

A __________ is a device that forwards packets between networks by processing the routing information included in the packet.a) bridge b) firewall c) router d) hub

Description : A __________ is a device that forwards packets between networks by processing the routing information included in the packet. a) bridge b) firewall c) router d) hub

Last Answer : c) router

Software that prevents unauthorized persons from accessing certain parts of a program, database or network is: a) Firewall b) Scanner c) Anti - Virus d) None of These

Description : Software that prevents unauthorized persons from accessing certain parts of a program, database or network is: a) Firewall b) Scanner c) Anti - Virus d) None of These

Last Answer : a) Firewall

Which among the following is correct characteristics about proxy server: a) A proxy server may act as a firewall by responding to input packets in the manner of an application while blocking other packets. b) A proxy server is a gateway from one network to another for a specific network application c) It performs its tasks or functions as a proxy on behalf of the network user; d) All of the Above e) None of These

Description : Which among the following is correct characteristics about proxy server: a) A proxy server may act as a firewall by responding to input packets in the manner of an application while blocking other packets. b) A ... as a proxy on behalf of the network user; d) All of the Above e) None of These

Last Answer : d) All of the Above

The first paper published on firewall technology was in ____, when engineers from Digital Equipment Corporation (DEC) developed filter systems known as packet filter firewalls: a) 1988 b) 1999 c) 1992 d) None of These

Description : The first paper published on firewall technology was in ____, when engineers from Digital Equipment Corporation (DEC) developed filter systems known as packet filter firewalls: a) 1988 b) 1999 c) 1992 d) None of These

Last Answer : a) 1988

The first type of firewall was the packet filter which looks at: a) network addresses b) Ports of the packet and determines if that packet should be allowed or blocked c) Both of above d) None of These

Description : The first type of firewall was the packet filter which looks at: a) network addresses b) Ports of the packet and determines if that packet should be allowed or blocked c) Both of above d) None of These

Last Answer : c) Both of above

Which among the following is correct: a) Network firewalls are a software appliance running on general purpose hardware or hardware based firewall computer appliances that filter traffic between two or more networks. b) Host - based firewalls provide a layer of software on one host that controls network traffic in and out of that single machine c) Both of Above d) None of These

Description : Which among the following is correct: a) Network firewalls are a software appliance running on general purpose hardware or hardware based firewall computer appliances that filter traffic between two or more networks. b ... traffic in and out of that single machine c) Both of Above d) None of These

Last Answer : c) Both of Above

Which among the following is correct: a) A firewall is a system designed to prevent unauthorized access to or from a private network. b) Firewalls can be implemented in both hardware and software or a combination of both. c) Both of Above d) None of these

Description : Which among the following is correct: a) A firewall is a system designed to prevent unauthorized access to or from a private network. b) Firewalls can be implemented in both hardware and software or a combination of both. c) Both of Above d) None of these

Last Answer : c) Both of Above

A firewall is a network security system ______based that controls incoming and outgoing network traffic based on a set of rules: a) Hardware b) Software c) Both hardware or software d) None of These

Description : A firewall is a network security system ______based that controls incoming and outgoing network traffic based on a set of rules: a) Hardware b) Software c) Both hardware or software d) None of These

Last Answer : c) Both hardware or software

A firewall is a ______security system: a) Network b) File c) Program d) None of These

Description : A firewall is a ______security system: a) Network b) File c) Program d) None of These

Last Answer : a) Network

__________ is a measure of whether the operation is inside or outside the security boundary or network firewall. a) Per b) P c) Pre d) All of the mentioned

Description : __________ is a measure of whether the operation is inside or outside the security boundary or network firewall. a) Per b) P c) Pre d) All of the mentioned

Last Answer : All of the mentioned

Your company receives internet access through a network or a gateway server. Which of the following devices is best suited to protect resources and subnet your LAN directly on the network server? 1) DSL modem 2) A multi-homed firewall 3) VLAN 4) A brouter that acts both as a bridge and a router

Description : Your company receives internet access through a network or a gateway server. Which of the following devices is best suited to protect resources and subnet your LAN directly on the network server? 1) DSL modem 2) A multi-homed firewall 3) VLAN 4) A brouter that acts both as a bridge and a router

Last Answer : 2) A multi-homed firewall

What are some of the benefits of using a firewall for your LAN? 1) Increased access to Instant Messaging 2) Stricter access control to critical resources 3) Greater security to your LAN 4) Both 2 and 3

Description : What are some of the benefits of using a firewall for your LAN? 1) Increased access to Instant Messaging 2) Stricter access control to critical resources 3) Greater security to your LAN 4) Both 2 and 3

Last Answer : 4) Both 2 and 3

A packet filtering firewall operates at which of the following OSI layer? 1) At the Application layer 2) At the Transport Layer 3) At the Network Layer 4) Both 2 and 3

Description : A packet filtering firewall operates at which of the following OSI layer? 1) At the Application layer 2) At the Transport Layer 3) At the Network Layer 4) Both 2 and 3

Last Answer : 4) Both 2 and 3