Showing posts with label Computer or Internet Security. Show all posts
Showing posts with label Computer or Internet Security. Show all posts

Tuesday, January 26, 2010

Remove Viruses From Your Computer - Tips and Tricks


Removing a computer virus in your computer can be a scary task.

Even the most experience computer tech might have a difficult challenges without the right software.

Technology has revolutionized the way we see the world. We are now able to have a conversation virtually face-to-face with someone in the other side of the world via messenger absolutely free.

Personal computers (PCs) since its introduction to the public in the mid 80s have changed our lives. Allowing the public to automate daily task, personal computers (PCs) have become critical tools to our everyday life.

However, since the birth of the internet for public usage back in the mid-late 90s, hackers have found a breeding ground.

Hackers are software developers that create programs to attack computer systems. One the most sophisticated software ever developed focuses on disabling antivirus programs by attacking PC's registry (PC database). Once antivirus software is disabled in a persona computer, it becomes an easy target for any attack. Hijack programs are responsible for scanning your computer for any credit card information stored in your computer or internet browser (including credit card transactions, online banking password and ID, etc). But, what is spyware and how dangerous is it? Spyware (hijack programs) are automatically installed in your computer without the users' consent and many times users are deceived to allow the programs to automatically install while surfing the internet.

The source of spyware can be an email, an infected internet page, or even an infected CD that installs information into your computer.

Spyware attacks in your computer can ruin your computer, your financial status, steal your identity, and use your computer as a hijack system to attack other computers. It's recommended to keep your antivirus up date and never open emails that you might not recognize, since emails with attachments are the easier way for spyware to access your computer. What are the symptoms?

While accessing the internet do you experience?

- Slow page download - Pop-ups

- Sudden freeze (Computer won't respond)

- Blue Screen with white letters (known as the blue screen of death)

- Computer won't respond after you turn it on.

Any of these symptoms might indicate that your system might be hijacked and it's recommend that you take to any computer repair place (which can be very pricey). Also, not following the correct steps can endanger your personal information such as or credit cards, or online banking login information. Also, it's recommended that you find a good program that can cure your registry. THE REGISTRY IS THE MOST HEART AND MOST IMPORTANT PART OF YOUR COMPUTER!! Good software will remove the spyware from the registry and remove any threats.

Hope my article provided you with helpful information

Good luck and stay safe.

For free antivirus help visit Help my computer.

I'm a computer system analyst always looking out for new technology to be studied and discovered. Pride on providing the community up to date information on the newest gadgets, or internet driving news...





Thursday, August 20, 2009

Hardware Firewall and Sentry Firewall

Hardware Firewall and Sentry Firewall
http://www.my3q.com/home2/274/zoranbg/image/firewall.jpg
Download Hardware Firewall and Sentry Firewall . The best firewall is a hardware firewall that is completely separate from your operating system. It need not be a dedicated router, could be an old pentium box running Linux. Below I have found some sites that have How To's on setting up an outside hardware router using an old computer and using a little linux program that fits on a single floppy disk.

Brief Description:
floppyfw is a router with the advanced firewall-capabilities in Linux that fits on one single floppy disc.

Features:
Access lists, IP-masquerading (Network Address Translation), connection tracked packet filtering and (quite) advanced routing. Package for traffic shaping is also available.
Requires only a 386sx or better with two network interface cards, a 1.44MB floppy drive and 12MByte of RAM ( for less than 12M and no FPU, use the 1.0 series, which will stay maintained. )
Very simple packaging system. Is used for editors, PPP, VPN, traffic shaping and whatever comes up. (now this is looking even more like LRP (may it rest in peace) but floppyfw is not a fork.)
Logging through klogd/syslogd, both local and remote.
Serial support for console over serial port.
DHCP server and DNS cache for internal networks.
floppyfw


Sentry Firewall CD-ROM is a Linux-based bootable CDROM suitable for use as an inexpensive and easy to maintain firewall, server, or IDS(Intrusion Detection System) Node. The system is designed to be immediately configurable for a variety of different operating environments via a configuration file located on a floppy disk, a local hard drive, and/or a network via HTTP(S), FTP, SFTP, or SCP.

The Sentry Firewall CD is a complete Linux system that runs off of an initial ramdisk, much like a floppy-based system, and a CD. The default kernel is a current 2.4.x series kernel with various Netfilter patches applied. An OpenWall-patched current 2.2.x kernel is also available on the CD.

Booting from the CDROM is a fairly familiar process. The BIOS execs the bootloader(Syslinux) - which then displays a bootprompt and loads the kernel and ramdisk into memory. Once the kernel is running, the ramdisk is then mounted as root(/). At this point our configuration scripts are run(written in perl) that configure the rest of the system. It is the job of these configure scripts to put the various startup and system files into the proper location using either what is declared in the configuration file(sentry.conf) or the system defaults located in the /etc/default directory.

Most of the critical files used at boot time can be replaced with your own copy when declared in the configuration file. This is essentially how we allow the user to configure the system using his/her own configuration and init files.

All of the binaries, files, scripts, etc, used to create the CD-ROM are also available on the CD-ROM. So, with a little practice, you can easily build and customize your own bootable Sentry Firewall CD. Please see the HOWTO for more details.
Sentry Firewall

Links

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