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HEM offers the best in phone system (VoIP or PBX) technology for your business.
Voice over Internet Protocol (VoIP), is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line
Firewalls
Every business organization that’s connected to the Internet needs a firewall to protect the internal network from attacks, but selecting the right firewall can be an overwhelming task. Computer and network security needs have changed drastically over the past several years, and firewall technology has evolved to meet those new, more demanding needs. The traditional firewall was a fairly simple contruct: it sat between the LAN (or in the case of personal firewalls, an individual computer) and the “outside world” of the Internet, and filtered packets coming in – and in some cases, going out – based on information in the Layer 3 and 4 headers (IP, TCP, UDP, ICMP). The decision to accept or reject a packet was usually based on the source or destination address or port number.
As attackers grew more sophisticated and began to exploit higher layer protocols (DNS, SMTP, POP3, etc.), firewalls had to do more. Most business-class firewalls today perform at least some application layer filtering, or ALF. See my article “ALF: What is it and How Does it Fit into Your Security Plan” on this site for details. ALF is necessary to prevent application layer attacks and to filter for spam and viruses, or to perform content filtering to block objectionable Web sites based on content rather than just IP address.
Firewalls today are often more than “sentries” at the network gate. Vendors have added other features that aren’t strictly firewall functions, such as VPN gateway and Web caching. Almost all modem firewalls other than those at the very low end support VPN, and many either include caching to accelerate Web performance or offer add-on modules for that purpose. In fact, many vendors have started calling their products “multifunction security” devices or software, instead of simply “firewalls.”