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What is firewall? and type's of firewall?

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Question added by JAYENDRA PARMAR , Support Engineers , Dunia finance LLC
Date Posted: 2013/12/31
Mostafa Khamies Dakam
by Mostafa Khamies Dakam , Network Specialist , Libyan Fertilizer Company

Component in the network used to prevent unauthorized access, it could be software or hardware based. the main function of the firewall is to block the unused ports.

mohammed akram
by mohammed akram , Network Enginee , Digital Oasis Information Technology company

firewall is used for protecting from unauthorised users and unnecessary traffic in your network . firewall made you network protected from intruder  and unknow  persons . there are so many firewall according to the leading interconnecting device manufacturer .

CIsco , juniper  in that various are ASA, checkpoint and many more .

mohamed hassan
by mohamed hassan , System administrator , salestax authority

-  a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts.

Syed Ahmed
by Syed Ahmed , 3rd Line Server Engineer , Redcentric

Hope this helps you ....

Firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form All messages entering or leaving the intranet (i.e., the local network to which you are connected) must pass through the firewall.

Note: In protecting private information, a firewall is considered a first line of defence; it cannot, however, be considered the only such line. Firewalls are generally designed to protect network traffic and connections, and therefore do not attempt to authenticate individual users when determining who can access a particular computer or network.

 

Types of firewalls

      àNetwork layer

      àApplication layer

      àProxy

      àUTM

      àPacket filtering:

      àCircuit-level gateway implementation

 

      àWeb application firewall

Waseem Bakhsh
by Waseem Bakhsh , IT Administrator , Chemical Development Company

firewall software/hardware used to block unauthorized access to your network. the hardware firewall better than software.

Saqib Mehmood
by Saqib Mehmood , Technical Team Lead/Safety Supervisor , Xchange Technology Group

 Firewall is used to prevent the unauthorized access to your network or computers.

Most popular firewall in Cisco is ASA series firewalls and in Juniper is Netscreen firewall.

 

Syed Kalif
by Syed Kalif , Infra Cloud Consultant-Architect , Visionet Systems

A firewall is a hardware or software system that prevents unauthorized access to or from a network. They can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet. All data entering or leaving the Intranet pass through the firewall, which examines each packet and blocks those that do not meet the specified security criteria.

Noman Abdul Hadi Memon
by Noman Abdul Hadi Memon , IT Specialist , Wael Fouad Jamjoom Co. For Umrah

firewall is used to filters the network traffic ..

Two Types hardware based and software based

hashum hussain
by hashum hussain , System Administrator , Amz Technologies

A firewall is used to block unauthorized access to our network it could be software or hardware based

 

Mohammed Rafique
by Mohammed Rafique , Software Engineer , Auro Infotech

Firewall is essentially a filter. It is either a software program or hardware device used in computer systems to prohibit forbidden information for passing though, while allowing approved information. The communication which the firewall prevents from passing though could be hackers trying to gain access to your personal information stored on your computer. 

types of firewall are 

 

Network layer or packet filters

Application-layer

Proxies

 

Network address translation

 

Deleted user
by Deleted user

Firewall - This can prevent unauthorized access between the networks, it can be software or hardware device .

Type of firewall:

1.     Packet filtering

2.     Stateful  inspection

 

3.     Application layer firewall 

 

 

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