function showVPN1()
{
dw("<FONT><B>VPN Settings</B><A NAME=VPN0></A><BR>")
dw("<font size=2>VPN Settings are settings that are used to create virtual private tunnels to remote VPN gateways. The tunnel technology supports data confidentiality, data origin authentication and data integrity of network information by utilizing encapsulation protocols, encryption algorithms, and hashing algorithms.<BR>")
dw("<UL><I><B>VPN enable item:</B></I>VPN protects network information from ill network inspectors. But it greatly degrades network throughput. Enable it when you really need a security tunnel. It is disabled for default.<BR>")
dw("<I><B>VPN enable item:</B></I>Computers running Microsoft Windows can communicate with one another using NetBIOS. Users can access remote network resources by browsing the Window Network Neighborhood.<BR>")
dw("<I><B>Max. number of tunnels item:</B></I>Since VPN greatly degrades network throughput, the allowable maximum number of tunnels is limited. Be careful to set the value for allowing the number of tunnels can be created simultaneously. Its value ranges from 1 to 39.<BR>")
dw("<I><B>Tunnel name:</B></I>Indicate which tunnel that is focused now.<BR>")
dw("<I><B>Method:</B></I>IPSec VPN supports two kinds of key-obtained methods: manual key and automatic key exchange. Manual key approach indicates that two end VPN gateways setup authenticator and encryption key by system managers manually. However, IKE approach will perform automatic Internet key exchange.")
dw("System managers of both end gateways only need set the same pre-shared key.<BR>")
dw("<I><B>Dynamic VPN settings:</B></I>VPN gateway allows users to build VPN tunnel from remote mobile host. Click this button to finish detailer configuration.<BR>")
dw("<I><B>More...:</B></I>To setup detailer configuration for manual key or IKE approaches by clicking the \"More\" button.<BR>")
dw("<I><B>View VPN Status:</B></I>Click this button and you will get more detailed information about IPSec tunnel of VPN gateway. You can also terminate certain IPSec tunnel manually by pressing drop button.</UL><P><P></FONT>")
dw("<FONT><B>Dynamic VPN Settings</B><A name=vpn2></A></FONT><BR>")
dw("<FONT SIZE=2>VPN gateway can ignore IP information of client when using Dynamic VPN, so it is suitable for users to build VPN tunnel with VPN gateway from remote mobile host.<BR>")
dw("<UL><I><B>Dynamic VPN enable item</B></I>:Enable it when you need remote mobile hosts build security tunnel with DI-"+mn+". It is disabled for default.<BR>")
dw("<I><B>Local subnet</B></I>:The subnet of LAN site of local VPN gateway. It can be a host, a partial subnet, and the whole subnet of LAN site of local gateway.<BR>")
dw("<I><B>Local netmask</B></I>:Local netmask combined with local subnet to form a subnet domain. Pre-shared key:The first key that supports IKE mechanism of both VPN gateway and VPN client host for negotiating further security keys. The pre-shared key must be same for both VPN gateways and clients.<BR>")
dw("<I><B>Select IKE proposal</B></I>:Click the button to setup a set of frequent-used IKE proposals and select from the set of IKE proposals for the dedicated tunnel.<BR>")
dw("<I><B>Select IPSec proposal</B></I>:Click the button to setup a set of frequent-used IPSec proposals and select from the set of IKE proposals for the dedicated tunnel.<BR></UL><P>")
dw("<FONT><B>L2TP Server Setting</B><A name=l2tps></A></FONT><BR>")
dw("<FONT SIZE=2>The VPN gateway can behave as a L2TP server, and allows remote hosts to access LAN servers after establishing L2TP connection with it. The device can support three authentication methods: PAP, CHAP, and MSCHAP(v1). Users can also enable MPPE encryption when using MSCHAP.<BR>")
dw("<UL><I><B>L2TP Server</B></I>:Check this checkbox to enable function of L2TP server.<BR>")
dw("<I><B>Virtual IP of L2TP Server</B></I>:The IP address of L2TP server. This IP address should be different from IP address of PPTP server and LAN subnet of VPN gateway.<BR>")
dw("<I><B>Authentication Protocol</B></I>:Users can choose authentication protocol as PAP, CHAP, or MSCHAP(v1).<BR>")
dw("<I><B>MPPE Encryption Mode</B></I>:Check this checkbox to enable MPPE encryption. Please note that MPPE needs to work with MSCHAP authentication method.<BR></UL><P>")
dw("<B>Tunnel Setting</B><BR>Users can input five different user accounts for L2TP server.<BR>")
dw("<UL><I><B>Tunnel Name</B></I>:Input the name for tunnel.<BR>")
dw("<I><B>User Name</B></I>:Input a user name that is allowed to establish L2TP connection with VPN gateway.<BR>")
dw("<I><B>Password</B></I>:Input the password for the user.<BR></UL><P>")
dw("<FONT><B>PPTP Server Setting</B><A name=pptps></A></FONT><BR>")
dw("<FONT SIZE=2>The VPN gateway can behave as a PPTP server, and allows remote hosts to access LAN servers after establishing PPTP connection with it. The device can support three authentication methods: PAP, CHAP, and MSCHAP(v1). Users can also enable MPPE encryption when using MSCHAP.<BR>")
dw("<UL><I><B>PPTP Server</B></I>:Check this checkbox to enable function of PPTP server.<BR>")
dw("<I><B>Virtual IP of PPTP Server</B></I>:The IP address of PPTP server. This IP address should be different from IP address of PPTP server and LAN subnet of VPN gateway.<BR>")
dw("<I><B>Authentication Protocol</B></I>:Users can choose authentication protocol as PAP, CHAP, or MSCHAP(v1).<BR>")
dw("<I><B>MPPE Encryption Mode</B></I>:Check this checkbox to enable MPPE encryption. Please note that MPPE needs to work with MSCHAP authentication method.<BR></UL><P>")
dw("<B>Tunnel Setting</B><BR>Users can input five different user accounts for PPTP server.<BR>")
dw("<UL><I><B>Tunnel Name</B></I>:Input the name for tunnel.<BR>")
dw("<I><B>User Name</B></I>:Input a user name that is allowed to establish PPTP connection with VPN gateway.<BR>")
dw("<I><B>Password</B></I>:Input the password for the user.<BR></UL><P>")
showHelp("vpnIKE")
}