C-8 User’s Reference GuideExported services are configured under IP Setup in System Configuration. This is where a particular type of TCPor UDP service originating from the Internet is redirected to a host on the Netopia R9100’s LAN interface. Anexample of this screen follows:Within exported services is a pop-up list of well-known TCP and UDP services that can be redirected to a singlehost on the Netopia R9100’s LAN interface. There is also an “Other...” option that allows for manualconfiguration of additional TCP or UDP ports. There can be a total of 32 exported services that can be defined.When a particular type of service is redirected to an IP address, that service is removed from the pop-up list,since only one type of service can be redirected to a single host. However several different types of servicescan be redirected to a single or multiple hosts. For example, port 80 (WWW server) could be redirected to192.168.5.3 on the Netopia R9100’s LAN interface, and port 23 (Telnet) can be redirected to that same host.SummaryNAT is a powerful feature of the Netopia R9100 and when used and set up properly can yield a secure networkwhile only using one IP address on the WAN interface. Note that the addresses listed in this appendix are fordemonstration purposes only. Do not use these addresses when configuring your local network.Add Exported Service+-Type------Port--++-----------------+Service... | ftp 21 || telnet 23 || smtp 25 |Local Server's IP Address: | tftp 69 || gopher 70 || finger 79 || www-http 80 || pop2 109 || pop3 110 || snmp 161 || timbuktu 407 || pptp 1723 || irc 6667 || Other... |+-----------------+ADD EXPORT NOW CANCEL
