Linksys WRVS4400N User Manual page 131

1. Refer to "Problem #2, I want to test my Internet connection" to verify that your computer is
properly connected to the Router.
2. Refer to "Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter" to
verify that your computer has an IP Address, Subnet Mask, Gateway, and DNS.
3. Set a static IP address on your system; refer to "Problem #1: I need to set a static IP address. "
4. Refer to "Problem #10: I need to remove the proxy settings or the dial-up pop-up window
(for PPPoE users). "
I can't get my Virtual Private Network (VPN) to work through the Router.
Access the Router's web interface by going to http://192.168.1.1 or the IP address of the
Router, and go to the VPN => VPN Pass Through tab. Make sure you have IPsec passthrough
and/or PPTP passthrough enabled.
VPNs that use IPSec with the ESP (Encapsulation Security Payload known as protocol 50)
authentication will work fine. At least one IPSec session will work through the Router; however,
simultaneous IPSec sessions may be possible, depending on the specifics of your VPNs.
VPNs that use IPSec and AH (Authentication Header known as protocol 51) are incompatible
with the Router. AH has limitations due to occasional incompatibility with the NAT standard.
Change the IP address for the Router to another subnet to avoid a conflict between the VPN IP
address and your local IP address. For example, if your VPN server assigns an IP address
192.168.1.X (X is a number from 1 to 254) and your local LAN IP address is 192.168.1.X (X is the
same number used in the VPN IP address), the Router will have difficulties routing information
to the right location. If you change the Router's IP address to 192.168.2.1, that should solve the
problem. Change the Router's IP address through the Basic Setup tab of the Web-based Utility.
If you assigned a static IP address to any computer or network device on the network, you need
to change its IP address accordingly to 192.168.2.Y (Y being any number from 1 to 254). Note
that each IP address must be unique within the network.
Your VPN may require port 500/UDP packets to be passed to the computer that is connecting
to the IPSec server. Refer to "Problem #7, I need to set up online game hosting or use other
Internet applications" for details.
Check the Linksys website at www.linksys.com for more information.
I need to set up a server behind my Router.
To use a server like a web, ftp, or mail server, you need to know the respective port numbers
they are using. For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and
port 25 (SMTP outgoing) and port 110 (POP3 incoming) are used for the mail server. You can
get more information by viewing the documentation provided with the server you installed.
Follow these steps to set up port forwarding through the Router's Web-based Utility. We will be
setting up web, ftp, and mail servers.
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Common Problems and Solutions
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