Group G-week14
- 1. How Corporate Firewalls Work What is a Firewall ? Types of Firewall Main fire wall product Impossible things of Firewall
- 2. What is a Firewall ? The system to prevent invading a computer network in the organization from outside. The computer in which such system was included. The cracking act which tries to invade the inner computer network from outside was compared to a fire. An expression as a “firewall” is being employed as the one which stops that.
- 3. Types of Firewall There are several types of firewall techniques: Packet filter: Looks at each packet entering or leaving the network and accepts or rejects it based on user-defined rules. Application gateway: Applies security mechanisms to specific applications, such as FTP and Telnet servers. Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Proxy server: Intercepts all messages entering and leaving the network.
- 4. Main fire wall product The software type ● Trustix Enterprise Firewall ● USP Secure Entry Serveer ● Visionys AirLock ● WinGate NAT Firewall ● Symatec Client Security The hardware type ● Blue Reef Sonar ● Celestix MSA SeriesCelestix Inc ● Cisco PIX and Cisco ASA ● Clavister ● Symantec Gateway Security
- 5. Impossible things of Firewall Even if an attack packet passed by in communication of the HTTP when HTTP becomes the access permission, I take it as normal communication by the firewall. As well as a packet unit, it is necessary to scan contents of the communication more to defend it. For a thing carrying this out, there is a product such as IPS which is contents filter and an application firewall, composition with IDS.