3Com OfficeConnect 3C855 Часто задаваемые вопросы - Страница 3

Просмотреть онлайн или скачать pdf Часто задаваемые вопросы для Шлюз 3Com OfficeConnect 3C855. 3Com OfficeConnect 3C855 3 страницы. Setting up vpn’s with the wireless cable/dsl gateway
Также для 3Com OfficeConnect 3C855: Руководство по установке (2 страниц), Руководство по установке (2 страниц), Использование (4 страниц), Настройка (4 страниц)

What is DHCP?

DHCP stands for Dynamic Host Configuration Protocol and is a way of

centrally controlling the addresses on your network. A computer (if DHCP is

enabled) will automatically obtain an address from the DHCP server and is

ready to access the network. The OfficeConnect Cable/DSL Gateway has a

built-in DHCP server to allocate IP addresses to the local network. No user

intervention is required.

What is VPN?

VPN stands for Virtual Private Network and is a means of securely

transmitting private data over a public network (like the Internet). This is

achieved by encrypting the data so that only the sender and the recipient can

decode the data. The OfficeConnect Cable/DSL Gateway allows the pass

through of VPN data so that a secure tunnel can be set-up through the

Gateway.

What are PC Privileges?

PC Privileges allow the network administrator to specify, which services are

allowed to be access by each PC or group of PCs on the local network are

allowed to access. For example, it might be necessary to block all Web and

FTP traffic from a group of PCs. This is easily achieved through the

management interface simply by clicking checkboxes.

What are Special Applications?

Some PC applications use more than one connection to communicate across

the Internet. These applications will not normally pass-through a firewall.

However, using the Special Applications feature it is possible to configure the

gateway to pass through the traffic.

A list of well-known Special Applications are pre-defined in the OfficeConnect

Cable/DSL Gateway and by selecting from a pull-down menu the selected

application is enabled. It is also possible for the user to define new Special

Applications if required.

What is a "Virtual Server"?

A Virtual Server is a computer on the local network, behind the gateway, that

has to be publicly accessible (e.g. Web Server, FTP Server etc). A Virtual

Server can be set-up simply by entering the last digit of the IP address of the

Virtual Server computer and selecting the service to be allowed through to the

computer. All traffic on the service will then be sent directly to the defined

Virtual Server. In this way, you are able to host Internet services from your

private network.

What is a Virtual DMZ?

A Virtual DMZ (De-Militarized Zone) is basically a group Virtual Server. All

traffic that has not already been directed to a specific Virtual Server can be

sent to a computer on the local network defined as the Virtual DMZ. A Virtual

DMZ might be used when an application that uses a very large number of

connections is being used, or an application where the port numbers of the

simultaneous connections are not known or are assigned dynamically.