Anti-spam firewall and antivirus wall

At present, there are more and more new nouns in the field of computer security, firewalls, anti-virus walls ... As spam becomes more rampant, America's biggest anti-spam firm, the company that has launched the Barracuda Spam firewall product, is not only able to accurately block spam, but also to be able to do a good job with the email antivirus wall, as well as the ability to withstand attacks, Become the best-selling anti-spam hardware product in the world. And what is the difference between this product and the firewall and antivirus wall?

Junk Mail Firewall

A spam firewall is a firewall that filters only mail packets. It cares only about the mail, and only listens for packets on port 25 (the SMTP protocol is the port of the Mail protocol). Some spam firewalls also have anti-virus capabilities, unlike the general antivirus wall, the virus is a mail virus sent as an attachment, and other viruses are not within its care. Its virus-handling mechanism is similar to the antivirus wall. The Barracuda Spam Firewall is a spam firewall with anti-virus capabilities. For example:

The "Barracuda" spam firewall includes 10 layers of protection:

Denial of service attacks and security protection,

IP Block List,

Rate control,

To extract virus protection from files,

Double virus Scan,

User-defined rules,

Junk Mail fingerprint check,

Email Intent Analysis,

Bayesian Intelligence Analysis,

A rule-based scoring system.

This filtering architecture optimizes the processing of each message, the ability to handle millions of messages per day, and the number and type of layers that are included in each solution can vary according to the user's specific needs. Continuous improvement based on technology to help customers understand the benefits and drawbacks of each anti-spam architecture and integrate these solutions at the most appropriate cost. This is done to solve the customer's problem with the most reasonable price and the most targeted solution.

Barracuda Junk Mail Firewall implementation features

Mainly to help businesses, mail operators to handle a large number of messages, and to block spam and filtering viruses to help the mail server load balance. Can handle millions of to tens of thousands of messages a day, in the own storage area to monitor suspicious mail, waiting for the designated administrator or end user to confirm that the confirmed message to enter the network. The design, which is installed outside the messaging system, does not interfere in any way with the work of the internal hardware and the network itself while filtering incoming mail and guaranteeing continuous updates to the spam rules.

Firewall

Firewalls are designed to protect an enterprise's internal network from external damage Protection Units, which can be hardware or software. Protection of the internal network through different levels of protection and protection measures. Firewall is a broad term, according to its protection of the focus of different, firewall can be divided into virus firewall, DOS (denial of service attack) firewall, DDOS (distributed denial of service attack) firewall, spam firewall and so on. There are also application-type firewalls that provide protection only for certain types of network connections (such as SMTP or HTTP protocols, etc.). There are also hardware-based firewall products. They work the same way: Analyze data packets from the firewall and decide whether to release or block.

Implementation features

The firewall mainly implements the following four functions:

Firewalls are a barrier to network security, which can greatly improve the security of an internal network and reduce risk by filtering unsafe services.

Firewalls can strengthen the network security policy, through the firewall-centric security scheme configuration, can all security software (such as password, encryption, identity authentication, audit, etc.) configured on the fire wall.

Monitor and audit the network access and access.

To prevent the leakage of internal information, through the use of the firewall of the Internal Network division, can achieve the internal network Focus network segment isolation, thus limiting the local focus or sensitive network security problems on the global network caused by the impact.

Antivirus wall

Antivirus wall, that is, virus firewall, as the name suggests is to protect the virus against the firewall. Firewall to pass through the packet to parse, against the existing virus library signatures, if found to match the signature, it is determined to find a virus. Because of the unpredictable nature of the virus, the protection of the virus can only be known after sleep, forever slow virus a beat. Of course, there is also the technology of proactive virus prevention, which determines the likelihood of the virus by "guessing" the intention of the unknown program. However, this technology is far from mature, it is very easy to have the phenomenon of miscalculation.

Implementation features

The anti-virus wall is an important supplement to the firewall for the purpose of strengthening the security of some common communication. The role of the antivirus wall is to have specific virus characteristics in the file contained in the protocol communication being monitored, antivirus walls do not prevent attacks like firewalls, nor do they prevent worm viruses, which, on the contrary, may be the target of network intrusion.

Above our understanding of the spam firewall, firewall and antivirus wall after the difference, I believe that we build a network security barrier, we can reasonably arrange all kinds of products, with less effort.