AcerRouter 700 Series User Guide 1-6Similarly, when a remote site requests the creation of a tunnel, the AcerRouter 700will search for an appropriate tunnel profile matching the setup request. Once thetunnel is established, the remote site will initiate a user session to flow through thattunnel and the AcerRouter 700 will search for a matching VPN Connection Profilematching the request. Once found, the AcerRouter 700 will use the information in thematched profile to authenticate the incoming "call", after which data transfer canbegin.Tunnels allow IP, IPX and Bridging traffic to flow across IP networks, includingNetBIOS information (for Windows networking) encapsulated within IP or IPXpackets. Therefore, all resources and applications on the remote LAN becomeavailable to the local site.User sessions through tunnels may specify DES encryption to assure privacy. The useof the various levels of encryption within a AcerRouter 700 is subject to exportcontrol regulations.A Configuration ExampleFigure 1-7 Connecting Two Private Networks with Internet AccessIn Figure 1-7, two AcerRouter 700s are installed in two different locations. Both ofthem are connected to the Internet, allowing users to surf the Web. They are alsoconnected to each other through the ISDN network, forming a private companycompany network.This example also illustrates an important feature of the AcerRouter 700 that bothpublic and private devices can physically reside on the same LAN.All devices on both LANs (except for the Web servers) are configured to obtain theirIP addresses automatically (i.e., from the built-in DHCP server in the AcerRouter700). Since these IP addresses are only used in the local LAN environment, thesedevices naturally form a private network (with default IP network address of192.168.168.0) and are not accessible by users across the Internet. On the other hand,Your LAN #1AcerRouter 700Web ServerPublic: 206.112.113.xxxPrivate: 192.168.168.230Public: 206.112.113.6Private:AcerRouter 700Private: 192.168.170.230Your LAN #2Private:192.168.168.xxx192.168.170.xxxISDNTheInternetISDN.