Posts Tagged ‘spam’

Types of Blog Spam

Saturday, November 15th, 2008

1. Basic comment spam. The spammer leaves a short uneventful message in a comment field in one of your entries. The spam comes from the URL placed in the comments URL field. These URLs link back to every conceivable scam.
2. Comment spam flooding. The spammer uses an automated computer bot to flood your blog with comment spam messages, up to hundreds in an hour. The spammer doesn’t necessarily leave a URL, but can leave garbage messages, almost like a graffiti artist. The comment spam can put a severe load on the server hosting your blog software to the point that it crashes.
3. Trackback Spam. Spammers have discovered how to take advantage of Trackback. TrackBack spam is very similar to comment spam. The spammer sends TrackBack pings to your site that direct viewers to a totally unrelated URL.
4. Referral spam. The spammer links to your site from their site, and then pings your site through their link, thus creating a reference and link to their site on the statistics referral log of your website. When you are reviewing your stats and see the reference to an odd site (ex. Paris Hilton), clicking on the link takes you to their site. Many people list “referrals” on their site publicly, so by spamming referral logs, not only does the spammer get a link on your referral log (which is picked up by Google) but may even get a link on your main page.

Virtual Private Server (VPS) Web Hosting

Thursday, June 26th, 2008

Shared hosting allows thousands of people to host their own sites at a very reasonable cost. It has some drawbacks, however. Since hundreds of sites can be hosted on a single server resources such as CPU, disk space, and bandwidth have to be shared with your virtual neighbours.

Shared resources are usually not a problem for small to medium sized sites. Your main limitation is the lack of control over system level software – http servers, mail servers etc. You don’t have any choice of operating system and you cannot compile programs or do administrative tasks such as setting up Spam filters or firewalls.

Many people would say ‘So what? I don’t want to do that stuff anyway!’ It’s true that the majority of website owners have no interest or ability to handle this kind of work and are happy to leave it to the hosting company. Those who desire more control over their server environment or wish to experiment with new software, however, can get access to this level of management with a Virtual Private Server.

A virtual private server (VPS) is a physical server that has been divided (using software) into several virtual machines, each acting as an independent dedicated server. The physical resources such as RAM, CPU and disk space are still shared, but each VPS acts independently of the others. Each VPS can have a different operating system and can be configured in any way possible.

The key advantage of VPS is allowing each VPS administrator access to the root level of his virtual server. This kind of access allows the administrator to install and delete software, set permissions, create accounts – in short, do everything that the administrator of a ‘real’ sever can.

As well as providing more control over your hosting environment, a VPS is more secure than shared hosting. Websites on a shared server all have the same operating system, so if a hacker were to find access to the root of the server he could damage any or all of the websites on that server. A VPS, on the other hand, is divided in such a way that even if a hacker were to gain entry through one account, there is no way to access the others. Each VPS is invisible to the others and there is no way to set up root level access from one VPS to another.

Virtual Private Servers can be set up in various ways so be sure to understand how the hosting company has allocated resources. The most common configuration is to divide all the physical resources evenly by the number of accounts. Thus, if there are 10 virtual servers, each would receive 10% of the total bandwidth, CPU, memory and disk space.

The disadvantages of VPS are almost the same as the advantages. The control that a VPS account provides can be dangerous if you don’t know what you are doing. You have the ability to delete files, set permissions improperly, allow virus-laden software on the system and, in general, really screw things up. If you don’t have the knowledge to administer a server, or are not willing to learn, VPS is not for you.

If your website has outgrown shared hosting, however, VPS offers an affordable alternative to dedicated hosting. When shopping for a VPS host, be sure to find out how system resources are divided up, the number of VPS accounts on each physical server, the method for upgrading, and the choices of operating systems.

What Color is Your SEO Hat?

Saturday, June 21st, 2008

n the search engine optimization industry it is well known that there are 3 types of hats that an seo may wear. There is the white hat seo who is on the up and up and does their job in a ethical manner. The black hat seo who does things in a not so ethical manner and normally does their optimization in a manner that the search engines state is not proper. Last but not least is the gray hat seo who is somewhere in the middle of the white and black hat seo.

It behooves me to say that most black hat seo companies are fly-by-night operations that stop doing business when the heat gets too hot. They close their operations only to start up somewhere else under a newly assumed company name. These companies make promises to their customers that they can’t deliver. We’ve all seen the promises like: “We guarantee you the #1 position on all the search engines for your industry keywords”. No one can make this guarantee, so don’t believe it.

So the moral to the story for companies out there who are looking to optimize their web sites is to make sure to deal with reputable companies. Make sure they have been in business for some time, check references, and ask them to show keyword results for work they have done to optimize web sites. Don’t be fooled by companies that send you spam mail with false promises to get your business. SEO is hard and rewarding work when done correctly!

What is Spam?

Tuesday, June 17th, 2008

Spam is the term used to describe junk mail messages sent to your e-mail account.

You may receive an e-mail and not recognise the address of the sender. Alternatively, spam mails can come from people you know, but who are not aware their account is being used by a malicious program to automatically send out junk mail to contacts in their address book.

Someone may forward a spam e-mail to you thinking it is a genuine message - perhaps appearing to be from a charity asking for your help to spread their message to everyone you know.

Like junk mail that comes through your door, spam e-mails often try to encourage you to buy a product or sign up for a service. Often there will be an attached file or a link to a web site, but these may actually be trying to install malicious software on your PC or attempting to get your personal information.

How can I tell if a message is Spam?

Tuesday, June 17th, 2008

Spam mails will usually try to entice you to open them by having titles that promise things like financial rewards, health products, the latest news or gossip, cheap deals or celebrity pictures. Often their titles will contain odd mis-spellings; these are attempts to fool anti-spam programs.

The safest course of action is not to open any e-mail you’re not expecting, especially if it has an attached file, or if you do not recognise the name or address of the sender.

If you have opened an e-mail and are trying to determine if it is genuine, you could try copying the subject line or some of the message into a search engine. If other people have mentioned it on any web sites you should be able to find out if it is spam. You should always do a search on any company before you buy from them or send them any money.

First spam felony conviction upheld

Monday, June 16th, 2008

Virginia’s Supreme Court on Friday upheld the first US felony conviction for spamming. The spammer will serve nine years in prison for sending what authorities believe to be millions of messages over a two-month period in 2003.

Jeremy Jaynes is the man who will make history. A Raleigh, North Carolina, resident who made Spamhaus’ top 10 list of spammers, Jaynes was arrested in 2003 even before the CAN SPAM act was passed by Congress. Jaynes was convicted in 2005, but his lawyers appealed the conviction. This past Friday, the Virginia Supreme Court upheld that conviction, but the vote was a narrow 4-3.

Most spam comes from just 6 botnets

Monday, June 16th, 2008

With the impact on Mega-D’s operations, Srizbi has now taken over as the leader of the spam pack responsible for nearly 40% of spam. Srizbi is well known as a spamming Trojan, and an advanced one at that. As we reported here, lately Srizbi has been particularly active in distributing spam with URLs that link to websites hosting more copies of the spambot. Analysis of Srizbi indicates it is extremely stealthy, operating in full kernel mode, which, among other things, allows it to hide its network activities and bypass sniffer tools. One interesting thing we noticed about Srizbi is that it provides continuous feedback and statistics to control servers about which email addresses were good, and which were bad.