How to Activate the Internet Firewall in Windows XP?

Firewalls are hardware or software components included in a computer to help protect against malicious activity over a network or the Internet. The Internet is an incredibly valuable resource, but one that also carries a lot of risks if not used properly and with care. Hackers, spyware and various other dangers are just a mouse click away. That's why it is important to activate your Windows XP Internet firewall and make sure it is working.


Activate Your Windows XP Internet Firewall

* 1 Ensure that you have the latest updates for Windows XP, including Service Pack 2. Service Pack 2 and the latest automatic updates provide functionality for the Windows XP integrated firewall.

* 2 Click on the "Start" menu button.

* 3 Click on the "Control Panel" selection.

* 4 Click on the "Security Center" link, or click the "Switch to Classic View" link to change the appearance of the control panel.

* 5 Examine the settings in the window that opens. The firewall settings will display either on or off. By default they are set to "on," unless you have changed your system settings or activated a firewall from a third-party application.

* 6 Re-enable the Windows firewall by clicking on the "Recommendations" button within the firewall frame. This will bring you to a window in which you can change the settings for the firewall.

* 7 Click the "Enable Now" button to activate the firewall.

* 8 Click "Close" in the window that opens. It's simply a notification to let you know that the firewall has successfully activated.

* 9 Click "OK" to shut the Recommendations window and return to the Settings window.

* 10 Copy and paste file names and links if you need to add them to the firewall exceptions list. This will prevent Windows Firewall from blocking incoming and outgoing Internet traffic that is generated or received by the selected program.

How to Increase Firewall Protection

With the constant threat of Internet hackers and identity thieves it is vital that your computer is fully protected and always updated for the latest viruses and malware. The Windows firewall, a default with most PCs, is a powerful anti-virus tool that can be configured to increase your computer's protection.

Instructions

Navigate to your Computer's Control Panel located in the Start Menu. Double-click on the "Windows Firewall" icon to open a new window. The Windows Firewall icon is represented by the image of a brick wall with the planet earth behind it.

Ensure that the Windows Firewall is switched on. If your firewall is not switched on your computer is susceptible to incoming viruses, Trojan horses and malicious files. Click the "On (recommended)" button to turn on your firewall.

Click the "Exceptions" tab at the top of the Windows Firewall window. You are still allowing certain programs and applications to download and transfer packages through your PC although your firewall is running. By altering the Exceptions of your firewall you can increase the protection of your PC. Clicking on the "Exceptions" tab opens a new window section.


Un-tick some of the programs that are more likely to contain or traffic malicious files. For example, P2P file-sharing programs such as Limewire, Ares and UTorrent are not 100 per cent regulated or checked for viruses.

Update your firewall with a Windows Service Pack. Windows is constantly updating the firewall software of its Operating Systems and this means that any new or previously-unknown malware will now be recognized and prevented from accessing your PC. Your computer will let you know and warn you when these new malicious files are accessing your computer.


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Firefox Clipboard Problems

Firefox interacts with the operating system in which it is installed to utilize the clipboard functions--copy, cut and paste. As with any program that interacts with the clipboard, issues can arise that cause the clipboard to no longer function within Firefox. Fixing these issues is a simple matter of diagnosing the cause of the problem. With Firefox, clipboard issues usually arise because of a few different conflicts.

Troubleshooting

If you are having troubles with the clipboard in Firefox, it is important that you isolate what is causing the issue. Be sure to note all programs running when the problem started. Look closely at the exact scenario in which the clipboard is not working. Is it within an email program, in a text editor, in a simple comment box, in the Firefox chrome itself? Noting all of these details will aid in quickly resolving the problem.

Malware or Virus Infections

The most common cause of clipboard problems in Firefox are viruses and malware infections. These viruses and malware target the Windows registry to enable exploitation and abuse of the clipboard contents by third parties. Usually, these viruses or malware will create a registry item called AppInit_DLLs which will interfere with proper clipboard function in Firefox and other browsers. These problems can be resolved with frequent spyware and virus scans and by installing real-time virus and spyware protection software.

Multiple Windows

In Windows, the clipboard functionality is shared by virtually all applications. When running multiple windows, particularly programs that utilize the clipboard at a high rate such as word processing or spreadsheet software, it can often happen that the clipboard contents are lost when switching the window focus. As of November 2009, this bug exists at the operating system level and within Firefox. This problem is resolved by simply launching a new window of Firefox.

Rich Text Editors

Some rich text editors used on websites include toolbar items to copy, cut and paste. Firefox disables this functionality within the rich text editor as a security precaution. In opening the clipboard up to usage by websites, the possibility exists that other websites could exploit the information within the toolbar without explicit permission. Firefox does continue to allow the usage of keyboard shortcuts to copy, cut and paste thus providing a sufficient workaround to this issue.

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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/