Category Archives: Networking

How Firewalls Work

How Firewalls Work

At their most basic, firewalls work like a filter between your computer/network and the Internet. You can program what you want to get out and what you want to get in. Everything else is not allowed. There are several different methods firewalls use to filter out information, and some are used in combination. These methods work at different layers of a network, which determines how specific the filtering options can be.

Firewalls can be used in a number of ways to add security to your home or business. Large corporations often have very complex firewalls in place to protect their extensive networks. On the outbound side, firewalls can be configured to prevent employees from sending certain types of emails or transmitting sensitive data outside of the network. On the inbound side, firewalls can be programmed to prevent access to certain websites (like social networking sites). Additionally, firewalls can prevent outside computers from accessing computers inside the network. A company might choose to designate a single computer on the network for file sharing and all other computers could be restricted. There is no limit to the variety of configurations that are possible when using firewalls. Extensive configurations typically need to be handle and maintained by highly trained IT specialists, however.

For home use, firewalls work much more simply. The main goal of a personal firewall is to protect your personal computer and private network from malicious mischief. malware, malicious software, is the primary threat to your home computer. Viruses are often the first type of malware that comes to mind. A virus can be transmitted to your computer through email or over the Internet and can quickly cause a lot of damage to your files. Other malware includes trojan horse programs and spyware. These programs are usually designed to acquire your personal information for the purposes of identity theft of some kind. There are two ways a firewall can prevent this from happening. It can allow all traffic to pass through except data that meets a predetermined set of criteria, or it can prohibit all traffic unless it meets a predetermined set of criteria.

Comodo Firewall Pro uses the latter way to prevent malware from installing on your computer. This free software Firewall, from a leading global security solutions provider and certification authority, use the patent pending “Clean PC Mode” to prohibit any applications from being installed on your computer unless it meets one of two criteria. Those criteria are a) the user gives permission for the installation and b) the application is on an extensive list of approved applications provided by Comodo. With this feature, you don’t have to worry about unauthorized programs installing on your computer without your knowledge.

Comodo Firewall Pro is rated as Top Firewall recommended for both beginners and advanced users. It has a number of unique features including “Defense +,” an advanced host Intrusion Prevention system (HIPS), which prevents changes to critical system resources. This software is highly customizable, so that you can adjust it to suit your specific needs.

By: Vijayanand

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Vijayanand working as a online marketing co-ordinator in ID Theft team in Comodo, a leading internet security provider, offers a real time Identity Theft Prevention and Identity Fraud restoration services among others.

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Winsock 2 repair

Winxp Tips And Tricks, Repairing Damaged Winsock2

The symptoms when Winsock2 is damaged show when you try to release and renew the IP address using IPCONFIG…

And you get the following error message:

An error occurred while renewing interface ‘Internet’: An operation was attempted on something that is not a socket.

Also Internet Explorer may give the following error message:
The page cannot be displayed Additionally, you may have no IP address or no Automatic Private IP Addressing (APIPA) address, and you may be receiving IP packets but not sending them.

There are two easy ways to determine if Winsock2 is damaged:

From the XP source files, go to the Support / Tools directory

Winsock Test Method 1
Run netdiag /test:winsock

The end should say Winsock test ….. passed

Winsock Test Method 2

Run Msinfo32
Click on the + by Components
Click on the by Network
Click on Protocol
There should be 10 sections if the Winsock2 key is ok
RSVP UDP Service Provider
RSVP TCP Service Provider
MSAFD NetBIOS [\Device\NetBT_Tcpip…
MSAFD NetBIOS [\Device\NetBT_Tcpip…
MSAFD NetBIOS [\Device\NetBT_Tcpip…
MSAFD NetBIOS [\Device\NetBT_Tcpip…
MSAFD NetBIOS [\Device\NetBT_Tcpip…
MSAFD NetBIOS [\Device\NetBT_Tcpip…

If the names are anything different from those in this list, then likely Winsock2 is corrupted and needs to be repaired.
If you have any 3rd party software installed, the name MSAFD may be changed.
There should be no fewer than 10 sections.

To repair Winsock2

Run Regedit
Delete the following two registry keys:

Restart the computer
Go to Network Connections
Right click and select Properties
Click on the Install button
Select Protocol
Click on the Add button
Click on the Have Disk button
Browse to the \Windows\inf directory
Click on the Open button
Click on the OK button
Highlight Internet Protocol (TCP/IP)
Click on the OK button

Free Satellite TV!

Television that comes through communication satellites is referred to as satellite television. Digital signals are beamed from satellites to users and these are of three primary types: signals received directly by the viewer, that received by local television affiliates for distribution, or reception by headends for distribution through cables.

Of the many satellite TV systems Dish Network and Direct TV are the main players. Both offer \”free\” satellite TV systems for four rooms with a bouquet of other services like over 250 program selections.

What is free to a first time user is the equipment needed to capture the TV signals. Otherwise one has to pay for viewing and choose a package that suits personal requirements. Many companies and online sites offer free services and enticing satellite TV deals but most of these are scams. Beware of traps and believe in the maxim \”nothing in life is for free.\”

Choose a service that has an established reputation and is authorized by Dish Network or Direct TV. The costs and charges must be transparent, and the provider must have a 24 hr customer service in place. Look for a guarantee that ensures a 100% refund if installation fails.

When ads scream \”Free satellite TV or Get a 4-room satellite TV System\” what you are being offered in actuality is enticement. A consumer gets the TV system installed and promotional gifts like a DVD or DVR free. But what you need to understand is that this is where the \”free\” part ends. Every month you will need to pay for programming services. Charges can include: activation fee of US$49.99 and then a monthly cost of about US $19.99 and subscription fees of US$ 31.99- US$86.00 for viewing 60-230 channels. In addition some providers ask for a deposit or prepayment.

So, to get digital viewing pleasure into your home you need to be prepared to spend $32-94 every month to view what is being promoted as Free Satellite TV.

Author: Steve Valentino
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