Author Topic: about firewall  (Read 946 times)

helenlawrence

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about firewall
« on: November 11, 2013, 10:44:21 PM »
hiee,


 What can a firewall protect against? ??

priyanka

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Re: about firewall
« Reply #1 on: November 12, 2013, 05:32:51 AM »
hello,

 Generally, firewalls are configured to protect against unauthenticated
interactive logins from the ``outside'' world. This, more than anything,
helps prevent vandals from logging into machines on your network. More
elaborate firewalls block traffic from the outside to the inside, but permit
users on the inside to communicate freely with the outside. The firewall can
protect you against any type of network-borne attack if you unplug it.

Firewalls are also important since they can provide a single ``choke point''
where security and audit can be imposed. Unlike in a situation where a
computer system is being attacked by someone dialing in with a modem, the
firewall can act as an effective ``phone tap'' and tracing tool. Firewalls
provide an important logging and auditing function; often they provide
summaries to the administrator about what kinds and amount of traffic passed
through it, how many attempts there were to break into it, etc.

Thanks
priyanka

soumya

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Re: about firewall
« Reply #2 on: November 12, 2013, 11:12:27 PM »
hello,

 Some firewalls permit only email traffic through them, thereby protecting the network against any attacks other than attacks against the email service. Other firewalls provide less strict protections, and block services that are known to be problems.

Generally, firewalls are configured to protect against unauthenticated interactive logins from the ``outside'' world. This, more than anything, helps prevent vandals from logging into machines on your network. More elaborate firewalls block traffic from the outside to the inside, but permit users on the inside to communicate freely with the outside. The firewall can protect you against any type of network-borne attack if you unplug it.

afsalabdulla

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Re: about firewall
« Reply #3 on: November 13, 2013, 12:28:37 AM »
hello,

Firewalls are also important since they can provide a single ``choke point''
where security and audit can be imposed. Unlike in a situation where a
computer system is being attacked by someone dialing in with a modem, the
firewall can act as an effective ``phone tap'' and tracing tool. Firewalls
provide an important logging and auditing function; often they provide
summaries to the administrator about what kinds and amount of traffic passed
through it, how many attempts there were to break into it, etc.

This is an important point: providing this ``choke point'' can serve the
same purpose on your network as a guarded gate can for your site's physical
premises. That means anytime you have a change in ``zones'' or levels of
sensitivity, such a checkpoint is appropriate. A company rarely has only an
outside gate and no receptionist or security staff to check badges on the
way in. If there are layers of security on your site, it's reasonable to
expect layers of security on your network.

Thanks

swetha

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Re: about firewall
« Reply #4 on: November 13, 2013, 02:07:20 AM »
hello,
A firewall is a system designed to prevent unauthorized access to or from a private computer network. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks—often described as intranets—connected to the Internet. All messages entering or leaving an intranet pass through a firewall, which examines each message and blocks those that do not meet specific security criteria.

A firewall is necessary to protect an organization’s confidential information from those not authorized to access it and to protect against malicious users and incidents that originate outside its network. One of the most important elements of a firewall is its access control features, which distinguish between good and bad traffic.

Thanks.

akhiljith

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Re: about firewall
« Reply #5 on: November 13, 2013, 03:40:59 AM »
hello,
  In computing, a firewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic by analyzing the data packets and determining whether they should be allowed through or not, based on applied rule set. firewalls can be defined in many ways according to your level of understanding. A firewall establishes a barrier between a trusted, secure internal network and another network (e.g., the Internet) that is not assumed to be secure and trusted.

hruthika

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Re: about firewall
« Reply #6 on: November 14, 2013, 02:00:24 AM »
Hello,

Firewalls are pieces of software loaded onto servers, personal computers, OEM boxes and appliances. The primary job of this piece of software is to monitor the incoming and sometimes outgoing traffic to and from a network, computer, appliance or some other network element. Firewalls are primarily used to enforce a set of rules to increase the security level of an organization. An example of such a rule can be “Do not allow access to a particular port for incoming traffic” or “Do not allow access to a service (like http) from a group of IP addresses” and more.

Thanks,
Hruthika.