3Com Version 4.3

Chapter1. Introduction to 3Com VCX IP Telecommuting Module

•Selectan IP address for the Telecommuting Module on your network.

•Thenetwork interfaces are marked with 1 and 2. These numbers correspond to the physical interfaces eth0 and

eth1respectively, the latter which should be use in the installation program.

•Plugin the power cord and turn on the Telecommuting Module.

•Waitwhile the Telecommuting Module boots up.

•Connectthe network cables to the network interfaces.

•Findout the MAC address of the Telecommuting Module’s Network Interface 1 (printed on the Telecommuting

Modulelabel).

•Adda static entry in your local ARP table consisting of the Telecommuting Module’s MAC address and the IP

addressit should have on Network Interface 1.

Thisis how to add a static ARP entry if you use a Windows computer:

Runthe command command (or cmd).

Inthe Command window, enter the command arp -s ipaddress macaddress where ipaddress is the new IP

addressfor Network Interface 1, and macaddress is the MAC address printed on the Telecommuting Module, but

withall colons (:) replaced with dashes (-).

•Pingthis IP address to give the Telecommuting Module its new IP address. You should receivea ping reply if the

addressdistribution was successful.

•Directyour web browser to the IP address of the Telecommuting Module. You will be prompted to set a

passwordfor the Telecommuting Module admin user.

•Nowyou can see the top page of 3Com VCX IP Telecommuting Module. Click on the Telecommuting Module

Typelink and select the conﬁguration for your Telecommuting Module. The types are described on the web page.

•Goto the Network Interface 1 page and enter the necessary conﬁguration. See also the Interface section. Note

thatthe Telecommuting Module must have at least one IP address which can be reached from the Internet.

•Ifone of the Telecommuting Module Types DMZ/LAN or Standalone was chosen, move on to the Network

Interface2 page and give the Telecommuting Module at least one IP address on this interface and state the

networksconnected to the interface. See also the Interface section.

•Goto the Networks and Computers page. Deﬁne the networks that will send and receive SIP trafﬁc using the

TelecommutingModule. Usually, you need at least one network per interface of the ﬁrewall connected to the

TelecommutingModule (or, for the Standalone type, per interface of the Telecommuting Module). Some

computersshould be handled separately, and they therefore need their own networks. See also the Networks and

Computerssection.

•Goto the Basic Conﬁguration page under Basic Conﬁguration and enter a Default gateway and a DNS

server.See also the Basic Conﬁguration section.

•Goto the Access Control page and make settings for the conﬁguration of the Telecommuting Module. See also

theAccess Control section.

•Goto the Surroundings page (for the DMZ Telecommuting Module Type) and state the networks connected to

theﬁrewall. See also the Surroundings section in chapter 7, Network Conﬁguration.

•Goto Basic under SIP Services and turn the SIP module on. See also the Basic section.

•Goto the Interoperability page. Turn Preserve username and SIP URL encryption on.

•Ifyou use a dialing domain which looks like an IP address, enter the dialing domain in the Translation

exceptionstable. See also the Interoperability section.

•Forthis type of dialing domain, you also need to go to the Routing page. Enter the dialing domain in the DNS

OverrideFor SIP Requests table and state the IP address of the SIP server(s) to handle the domain. See also the

Routingsection.

•Goto the Save/Load Conﬁguration page under. Select Apply conﬁguration. Now you can test your new

conﬁgurationand save it permanently if you are satisﬁed with it. If the conﬁguration is not satisfactory, select

Revertor restart the Telecommuting Module. The old conﬁguration will remain.