Multitech MTPSR1-202ST Podręcznik Użytkownika Pobierz pdf (Strona 27)

Chapter 4 - ProxyServer Software

MTPSR1-202ST

A Typical Internet Application

A typical Internet application is shown in Figure 4-1 with your ProxyServer connected to the Internet

through an ISP with an ISDN type connection to your ProxyServer. All the workstations, servers, and

printer are connected to the HUB (LAN), and each has a unique IP address. The ISDN ProxyServer

is also connected to the HUB via an unregistered IP Address (for this example, 192.168.2.8). When

the software was loaded (in Chapter 3), the ProxyServer was properly configured to connect through

the WAN port to the ISP.

File Server

IP Address

192.168.2.102

Print Server

IP Address

192.168.2.103

Printer

IP Address

192.168.2.104

Workstation

IP Address

192.168.2.105

Workstation

IP Address

192.168.2.106

Workstation

IP Address

192.168.2.107

IP Address 192.168.2.8

Mask 255.255.255.0

Internet

LAN Hub

ProxyServer

WAN

Port

Figure 4-1. Typical Internet Application

To configure an ISDN ProxyServer as in our typical application above, an unregistered IP address is

established for the LAN connection, the WAN IP address can be either a static address which you

have to enter or a dynamic address that is assigned by your ISP, and some up-front information from

your local ISDN service provider such as central office network switch type that is being used to

connect your ISDN service, how dta and voice terminal endpoint identifiers (TEIs) are being used,

and data and voice Service Profile Identifier (SPID) or ISDN if European parameters are being used,

and finally the data and voice directory numbers or again if European parameters are being used, the

data and voice subAddresses.

An IP address is a combination of a network number and a host number or ID. IP address masks are

used to specify the network or subnet portion of the IP address. IP addresses and masks are 32-bit

values. They are usually provided in dotted decimal notation. In this notation, each 8-bit portion of the

address is given a decimal quantity separated by a dot. For example, 192.2.10.1. The Proxy Server

expects all IP addresses to be provided in dotted decimal notation. Among IP addresses, address

0.0.0.0 and 127.?.?.? cannot be specified as they are special case addresses not used on the

internetwork for addressing. For Class A, B, and C addresses, you will usually specify address masks

of 255.0.0.0, 255.255.0.0 and 255.255.255.0 respectively unless other subnets have been set up.

The net mask specifies the network or subnet portion of an IP address. The net mask is a 32-bit

value presented in dotted decimal notation.

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