Proxim AP-2500 Dynamic Address Translation (DAT)

Introduction

•Outgoing e-mail (SMTP) Redirection: You can configure the AP-2500 to redirect outgoing e-mail messages to a

specified Simple Mail Transfer Protocol (SMTP) server. Subscribers can send e-mails as if they were connected to

their home network. See SMTP Redirection for details.

•VPN Passthrough: The AP-2500 can support multiple PPTP and IPsec VPN sessions for subscribers. See VPN

for details.

•Support for Application Level Gateways (ALGs): The AP-2500 supports Application Level Gateways (ALGs)

providing transparent access to subscribers for popular Web-based applications that do not work in typical Network

Address Translation (NAT) environments (see Dynamic Address Translation (DAT) for details). The AP provides

support for the following protocols:

– H323 (protocol used by Microsoft NetMeeting)

– Real Audio

–SMTP

– FTP

– PPTP (for VPN connections)

– IPSec (for VPN connections)

•Multiple Authentication Options: To authenticate subscribers, you can use the Access Point’s Internal Web

Server (IWS), an External Web Server (EWS), or RADIUS. See AP-2500 Authentication Methods for details.

•SSL Support: If using Internal authentication, you can copy your company’s digital certificates to the AP-2500 to

create HTTPS pages that provide end-to-end encrypted links between the AP and subscribers. See Secure Socket

Layer (SSL) for details.

•“Remember My Login” Cookie: The Access Point can store a cookie in your subscriber’s Web browser to

facilitate future logins by the customer.

•Billing Records Mirroring: Access Points can send copies of credit card billing records to a list of external

servers that you specify. See Credit Card Mirroring for details.

•Information and Control Console: The AP can open a Java pop-up window on your subscribers’ Web browsers

that reports the amount of time remaining in the user’s account (if paid for by credit card) or allows the user to

logout (if using RADIUS to manage users). Also, the ICC supports multiple advertising banners that you can

customize for your hotspot. See Information and Control Console (ICC) for details.

•Dynamic Billing Selection/Bandwidth Management: With ICC enabled, subscribers can dynamically switch

between billing plans to increase or decrease their own bandwidth.

•Walled Garden: You can provide unauthenticated users with free access to a limited number of Web sites as a

promotional tool. See Passthrough Addresses for details.

•Home Page Redirection: You can automatically redirect subscribers to the Web site of your choice either before

authentication (see Portal Page) and/or after authentication (see Home Page Redirection (HPR)).

•IP Upsell: You can configure the AP-2500 to offer public addresses to power users at a premium price. See

IP Upsell for details.

•URL Filtering: You can prohibit your subscribers from accessing specific Web sites. See URL Filtering for details.

Dynamic Address Translation (DAT)

Dynamic Address Translation (DAT) is a technique that eliminates IP configuration issues and the associated

complaints and support requests from subscribers.

Without DAT, a subscriber will typically need to change the following settings (twice -- once to join the hotspot network

and then set them back again to rejoin the user’s home network):

• IP Address

• Subnet Mask

• Default Gateway Address

• DNS Server Addresses

• Web browser’s proxy settings

• Outgoing mail server settings

DAT eliminates the need for subscribers to change any of these settings. The AP-2500 automatically redirects

subscriber messages to the appropriate location. DAT even works if a user’s wireless card is configured with static

IP settings.