Windows Firewall and Its Importance !!

Windows Firewall acts as a protective shield for your computer against possible safety intrusions. It is highly effective in blocking computer worms and viruses from reaching the computer and making unauthorized changes and "stealing" information. It is worth noting here that Windows Firewall protects your PC by five services: packet filtering, application filtering, proxy server, circuit-level, and Stateful inspection. Firewall prompts the user to accept or decline certain connection requests so that PC security is not compromised at any stage and all operations are authorized, to say the least. In other words, PC users can specify rules for source and destination IP addresses and port ranges.

It is, however, important to note that Windows Firewall does not block spam or unsolicited emails. Firewall also does not stop PC users from opening emails that can include dangerous attachments and doesn't detect or remove computer worms or viruses. It is, therefore, recommended that PC users must install powerful antivirus software and update the same on regular intervals so that PC security is not exposed before threats.

Now that we have read about Windows Firewall and its importance, it is now time to read what to do in case the very purpose of Windows Firewall, PC security, is defeated by an intrusion.
In case you are experiencing problems with Windows Firewall, you can always refer to computer troubleshooting service. This will help you identify the problem and even treat in some cases. In case the intrusion is severe, it is highly recommended that you opt for professional computer help desk service. This computer support service can be accessed for free or little cost from a reliable computer tech help provider.

If you are not aware of any such providers, you can go online to find a provider specializing in such services. For this, you need not make any special efforts. You can just search engines such as Google, Yahoo!, or MSN and type words such as "computer support service", "computer tech help", "computer troubleshooting service", or "computer help desk service". You will be redirected to sites of computer support service providers and then you can compare and choose from the available options. It will now be time to clarify any doubts (if any) from the provider and setting the computer tech help terms so that things are simplified for a better understanding.
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How to Get Rid of a Sonicwall Firewall

A firewall is a software program that serves as a barrier between your computer and remote hackers, viruses and worms. It is a vital piece of equipment if you wish to keep your computer secure. Windows XP, Windows Vista and Windows 7 come equipped with a firewall, as do many antivirus programs. Consequently, if you have Sonicwall Firewall, you may want to remove it in favor of one of these other firewalls.

Instructions

Windows 7 and Vista

Click the "Start" menu, then "Control Panel." Click "Programs" and "Programs and Features."

Click "Sonicwall Firewall" and then "Uninstall."

Restart your computer.

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Why Is My Firewall Blocking Windows Live Messenger

Windows Firewall is a protective computerized barrier integrated into Windows operating systems to prevent certain programs from accessing your computer. The firewall checks all programs and will automatically block programs it views as a potential hazard.

Cannot Log On

If you are having trouble logging into Windows Live Messenger, your firewall may not be giving the computer network permission to access it. Check your firewall settings by clicking "Start," "Settings," "Control Panel," and opening the Windows Firewall application. Click the "Exceptions" tab to see the list of programs being blocked.

Messenger

Messenger is executed by the msnmsgr.exe file. If you do not see this file or "Windows Live Messenger" in the list, you should click the "Add Program" button and look in the list for Messenger. If it is not in the list, click the "Browse" button and locate it through the programs folder. Click the "OK" button once the Messenger program has been added to the list.

Other Firewalls

Routers have firewalls to protect the computer from the external source of the router network. Anti-virus programs have their own firewall as part of their protection systems. If you have other firewalls running on your computer, access that firewall and give it permission to access the Messenger program.


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IP Spoofing and IPS Protection with a Cisco ASA 5500 Firewall

The Cisco ASA firewall appliance provides great security protection out-of-the box with its default configuration. However, to increase the security protection even further, there are several configuration enhancements that can be used to implement additional security features. Two of these features are IP Spoofing protection and basic Intrusion Prevention (IPS) support.

IP Spoofing Protection:

IP spoofing attacks are those that change the actual source IP address of packets to obscure their true origin. This means that packets arriving at a particular interface (e.g inside) must have a valid source IP address that matches the correct source interface according to the firewall routing table. Normally the firewall only looks at the destination address of a packet in order to forward it accordingly. If you enable the IP Spoofing mechanism, the firewall checks also the source address of the packets.

If for example our inside interface connects to internal network 192.168.1.0/24, this means that packets arriving at the inside firewall interface must have a source address in the range 192.168.1.0/24 otherwise they will be dropped (if IP Spoofing is configured).

The IP Spoofing feature uses the Unicast Reverse Path Forwarding (Unicast RPF) mechanism, which dictates that for any traffic that you want to allow through the security appliance, the security appliance routing table must include a route back to the source address.

To enable IP Spoofing protection, enter the following command:

CiscoASA5500(config)# ip verify reverse-path interface "interface_name"

For example, to enable IP spoofing on the inside interface, use the following command:

CiscoASA5500(config)# ip verify reverse-path interface inside

Basic IPS Protection:

Although the ASA Firewall supports full IPS functionality with an extra IPS hardware module (AIP-SSM), it supports also basic IPS protection which is built-in by default without using an extra hardware module. The built-in IPS feature supports a basic list of signatures and you can configure the security appliance to perform one or more actions on traffic that matches a signature. The command that implements the basic IPS feature is called "ip audit".

There are two signature groups embedded in the firewall software: "Informational" and "Attack" signatures. You can define an IP audit policy for each signature group as following:

For informational signatures:

CiscoASA5500 (config)# ip audit name "name" info [action [alarm] [drop] [reset]]

For attack signatures:

CiscoASA5500 (config)# ip audit name "name" attack [action [alarm] [drop] [reset]]

The keywords [alarm], [drop], [reset] define the actions to perform on a malicious packet that matches one of the signatures. [alarm] generates a system message showing that a packet matched a signature, [drop] drops the packet, and [reset] drops the packet and closes the connection.

After defining an IP audit policy (IPS policy) as shown above, we need to attach the policy to a specific interface:

CiscoASA5500 (config)# ip audit interface "interface_name" " policy_name"

Let's see an actual example:

CiscoASA5500 (config)# ip audit name dropattacks attack action drop

CiscoASA5500 (config)# ip audit interface outside dropattacks

You can visit my website Cisco Tips for more information about Cisco products and solutions. You can also learn how to configure any Cisco ASA 5500 Firewall Here.

Article Source: http://goarticles.com/article/IP-Spoofing-and-IPS-Protection-with-a-Cisco-ASA-5500-Firewall/1237260/

How To Open Firewall Ports In Windows 7

All connections into and out from a computer to the Internet, have associated a number of roads or highways of data called Ports.

Generally, applications that need to interact with the Internet, require a way that power authorized by moving data in and out, but for security reasons, Windows 7 as well as other operating systems, by default only ports that are open brings necessary for the most basic functions.

In this manual, we will explain the steps to open ports on Windows 7 and so using this process, you can open ports for eMule in Windows 7 or to play online in Windows 7.

Configure the ports in Windows 7

The first thing we must do to open ports on Windows 7, is to access the Windows Firewall. To do this, enter the Control Panel and select Windows Firewall.

Then click on Advanced Settings (Advanced Settings) and in the window that opens, select the left, input rule (Inbound Rules).

Now, a list of all applications and access settings on the firewall in Windows 7 is opened. We can give full access to the connections of an application (which is not highly recommended if not familiar with this) or we can open the ports that need to perform a certain activity.

To open the ports in Windows 7, click on New Rule (New Rule) and we see a new window
Click on Ports (Port) and now must tell Windows 7, what we want to open ports.

Because Windows7 firewall provides support for managing multiple types of networks is also necessary to indicate which networks you want to apply this rule of ports.

Finally, to end of open ports on Windows 7, the firewall asks us to believe this kind of profile associated with ports that are open. In this window, we will assign a name (eg Messenger) and a description that we put the ports you have open this rule.

To finish the process, click on Finish and you've been able to open ports in Windows 7 games or other applications that require this process.

Source: http://goo.gl/KuXIe

Stop Intruders From Accessing to Your PC With Free Firewalls for Windows 7

Are you using Windows 7 operating system and looking for a free firewall so that you can block unwanted access to your PC? If the answer is yes, this article is worth reading. Although Windows 7 operating is an excellent operating system comprising a number of robust security features but still there are some loopholes which allow the hackers to access to your computer. There are viruses, spyware and adware designed by the hackers to make their job easier. So, how to block them and enjoy secure computing? In this article you will find some important tips and recommendations regarding firewall which will allow you to block the hackers.

Windows XP operating system boasts built-in firewall and in Windows 7 this integrated firewall has been beefed up. The Windows 7 free firewall is by default turned on that block unwanted access. You can configure the Windows 7 integrated firewall by accessing the Control Panel / Security Center. But this firewall could not pass through leak testing done by security researchers. So, even after using the firewall there is enough chance of data being theft.

The job of a firewall is not only to protect important and sensitive data but also block port scans, unwanted requests and hacking attempts. You can use a third party firewall as better security measures. There are many free Firewall software programs for Windows 7 that could be used for boosting your PC security.

Although the markets if flooded with many free Windows 7 compatible firewalls but all of them are not top products. So, you should do some research before installing one of them. Ashampoo FireWall, Blink Personal Edition, PC Tools Firewall Plus, Sunbelt Personal Firewall Version, VirusBuster Internet Security Suite, ZoneAlarm Basic Firewall, Comodo Firewall, Online Armor Firewall, Outpost Firewall, etc. are to name a few in this context.

A firewall alone could not be enough to safeguard your computer. Along with a firewall you should install powerful antivirus software. You may find innumerable free antivirus software available in the market. But for secure computing, it is recommended to go for a paid version. AVG, Norton, Avast, Kaspersky, etc. are some of the most renowned names in this regard. You can first try with the trial version and if you find the experience satisfactory, then go for the full version. Remember, for optimal protection there should be a good combination of anti-virus, antimalware and firewall on your computer.

If you find difficulties to install firewall or need firewall configuration support, you can get in touch with an online computer repair company. There are many such service providers available that offer tech support at a very reasonable price.

Source: http://goo.gl/8oBjY

Need For Firewall Support

A firewall software application aims at controlling access to or from a computer for security related concerns. A firewall is a software program, hardware device, or a combination of both that keeps a vigilant watch over your incoming data coming through the Internet connection into your computer. The firewall will only allow data in that you asked for. It will also monitor outgoing data of your computer to the Internet. It will only let information out that you say can go out.

Windows firewall is a fully developed firewall application which can start on its own and should be left on if you are not replacing it with any other firewall product. And, there is no doubt about efficiency of Windows firewall.

Windows XP's Internet Connect Firewall is half a firewall. It only checks incoming information of your PC and doesn't check outgoing data of your computer. Why is it still popular among computer users? If your system has by mistake become virus infected, your personal information is definitely in danger. Virus replicates itself and spread infection to other computers connected through a common network, or even allows hackers to access your computer to do whatever they want.

The only quality of a true firewall is that it will prevent infectious matter from getting out of your system & inform you about the existing problem so you can clean it up. This is what makes firewall software to be the most important thing for your PC security.

A managed firewall ensures the highest level of security for an enterprise network. As signified by its name, 24x7 firewall ensures that your data is secure and protected round the clock.
If you do not have an efficient monitoring and network reporting system in place then your database might not be running efficiently. You can think about buying support from computer support centers to for an effective data management and keep your database up and running on a 24x7 basis in an effective manner. However, be meticulous enough while choosing your technical support partner. The decision must be based on the factors like experience, market reputation and service prices.

Source: http://goo.gl/eGa3h