Security gateway

Security gateway is various technical interesting fusion, has important and unique protection function, its range from agreement to very complex grade filter the application level filtering.

Application protocols

In the application of network security gateway seven layer protocols:

The OSI is an open systems interconnection reference model of traffic, and he is a very good agreement standard definition. The OSI model have seven layer structure, each layer can have several son layer.

Below I briefly introduce the seven layers and their function.

The seven layers of the OSI respectively from top to bottom

7 the application layer

6 the presentation layer

5 session layer

4 the transport layer

3 the network layer

2 the data link layer

1 physicality

One top, or 7, 6, 5, 4 layer defines the application program function, below 3 layer, or layer 3, 2, 1 through network mainly for the end-to-end data flow.

The current security gateway in application-layer and network layer above have the firewall figure, in the third top still can see VPN role. Antivirus wall this security gateway effect on the second. According to the seven layers of the high level limit, low level agreement in agreement can be the principle, the development of security gateway headed to the high-grade agreement route.

Gateway and router difference:

Gateway is access routers IP and other computer must be and gateway an IP section are able to access routers, for example the router IP is 192.168.0.1 (this is the gateway) is also into the address, other router must also must be the host 192.168.0. X (2-254 any digital) between able to access a router also means that the Internet, a computer that can 192.168.0.1 gateways to address will fill in

Function characteristics

1, intelligent access, perfect and reliable

Product support ADSL, optical fiber and so on many kinds of ways broadband access plan, realize the flexible expanded bandwidth and cheap access. Through the routing, NAT, many link multiplexing and detection capabilities for enterprise solves the flexible expand bandwidth and cheap access access solutions.

2, health network, application security

The product through itself is firewall, anti-virus, intrusion detection, user access authentication, and other functions, initiative for enterprise, provides the omni-directional LAN access security management plan. Through own have a DHCP server, the ARP firewall, DDNS functions for enterprise, provides the omni-directional LAN management plan.

Three, mobile office, safely and quickly

Products SSLVPN, IPSEC with L2TP PPTP, etc, and can let users VPN functions through a key type operation, convenient set price cheap wan special network, provide enterprises with wan security business communication channel, convenient realized the enterprise headquarters and mobile workers, branch, partners, product suppliers, customers, enhance the connections between with branches, customers, suppliers and partners to develop their business ability.

4, inhibit bandwidth abuse, security key business

Dynamic intelligent bandwidth management functions, just one-time Settings, automatic depressive occupy bandwidth users, easily solved BT, P2P and video movie download occupied the bandwidth.