3Com 3CRWE51196 - OfficeConnect Wireless Cable/DSL Gateway Setting Up

Setting up VPN’s with the                          

OfficeConnect Cable/DSL Gateway (3C855) and   

OfficeConnect Wireless Cable/DSL Gateway   

(3CRWE51196) 

1 Introduction 

The OfficeConnect Cable/DSL Gateway and OfficeConnect Wireless Cable/DSL 

Gateway do not provide any Virtual Private Network (VPN) initiation or termination 

functionality. However, they do have a “pass-through” feature, which allows certain 

types of VPN traffic through. Table 1 below shows a summary of the VPN traffic 

types that the Gateway can pass. 

Note that different conditions will apply depending on whether the VPN was initiated 

from the LAN (Intranet) side of your Gateway, or whether it was initiated from the 

Internet side. From here on, a direction of “From the LAN to the Internet” refers to a 

VPN connection initiated from your LAN. “From the Internet to the LAN” refers to a 

VPN connection initiated from the Internet. 

Table 1 - A Summary of the VPN traffic types supported by the OfficeConnect Cable/DSL 

Gateway and OfficeConnect Wireless Cable/DSL Gateway  

Direction 

VPN Type 

From the LAN to the Internet 

From the Internet to the LAN 

IPSec 

see section 2.1 

see section 2.2 

PPTP 

see section 3.1 

see section 3.2 

L2TP (Windows 

2000) 

see section 4.1 

see section 4.2 

The configuration notes that follow all assume that the Gateway is correctly 

configured for Internet access.