Internet Security & Firewalls
Southeast PC Repair provides expert same day onsite internet security and firewall services.
You can use a firewall to protect your home network and family from offensive Web sites and potential hackers.
Basically, a firewall is a barrier to keep destructive forces away from your property. In fact, that's why it’s called a firewall. Its job is similar to a physical firewall that keeps a fire from spreading from one area to the next.
Packet filter: Looks at each packet entering or leaving the network and accepts or rejects it based on user-defined rules. Packet filtering is fairly effective and transparent to users, but it is difficult to configure. In addition, it is susceptible to IP spoofing
Application gateway: Applies mechanisms to specific applications, such as FTP and Telnet servers. This is very effective, but can impose performance degradation.
Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Once the connection has been made, packets can flow between the hosts without further checking.
Proxy server: Intercepts all messages entering and leaving the network. The proxy server effectively hides the true network addresses.
In practice, many firewalls use two or more of these techniques in concert. A firewall is considered a first line of defence in protecting private information. For greater security, data can be encrypted.