User manual ZYXEL NBG-415

[. . . ] ZyXEL NBG-415N Draft 802. 11n Wireless Broadband Router User's Guide Version 1. 00 10/2006 Edition 1. 00 ZyXEL NBG-415N User's Guide Copyright Copyright © 2006 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. [. . . ] Click Save to save the changes of a configuration screen for the current session. Click Clear to start configuring a screen again. 7. 2 Virtual Server With the virtual server (also known as port forwarding) feature, you can make inside (behind NAT on the LAN) servers, for example, web or FTP, visible to the outside world even though NAT makes your whole inside network appear as a single computer to the outside world. 73 Chapter 7 Advanced ZyXEL NBG-415N User's Guide You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers. You can allocate a server IP address that corresponds to a port or a range of ports. Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at your location. If you are unsure, refer to your ISP. 7. 2. 1 Common Services and Port Numbers The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further information about port numbers. Table 27 Virtual Server: Common Services and Port Numbers SERVICES ECHO FTP (File Transfer Protocol) SMTP (Simple Mail Transfer Protocol) DNS (Domain Name System) Finger HTTP (Hyper Text Transfer protocol or WWW, Web) POP3 (Post Office Protocol) NNTP (Network News Transport Protocol) SNMP (Simple Network Management Protocol) SNMP trap PPTP (Point-to-Point Tunneling Protocol) PORT NUMBER 7 21 25 53 79 80 110 119 161 162 1723 7. 2. 2 Virtual Server Setup To configure virtual server settings, click Advanced > Virtual Server. Chapter 7 Advanced 74 ZyXEL NBG-415N User's Guide Figure 47 Advanced: Virtual Server The following table describes the labels in this screen. Table 28 Advanced: Virtual Server LABEL Active DESCRIPTION Select this check box to enable this virtual server setting. Clear this check box to disallow forwarding of these ports to an inside server without having to delete the entry. Enter a name to identify this port-forwarding rule. Alternatively, select a pre-defined name from the drop-down list box to have the ZyXEL Device fill in the default port numbers for the selected service. Enter the inside IP address of the inside server. Alternatively, select the name of a LAN computer from the drop-down list box to have the ZyXEL Device fill in the IP address of the computer. Select the protocol type (TCP, UDP or Both). Enter the port number to which you want the ZyXEL Device to translate the public port. Enter the incoming port number for the selected service. Select You can configure filter actions in the Inbound Filter screen. Select the name of a time setting during which this setting is active. You can configure schedules in the Schedules screen. Click this button to save the changes of a configuration screen for the current session. Click this button to start configuring a screen again. Name IP Address Protocol Private Port Public Port Inbound Filter Schedule Save Clear Virtual Server List 75 Chapter 7 Advanced ZyXEL NBG-415N User's Guide Table 28 Advanced: Virtual Server (continued) LABEL Enable DESCRIPTION Select this check box to enable this virtual server setting. [. . . ] Repeat the above two steps for each IP address you want to add. Configure additional default gateways in the IP Settings tab by clicking Add in Default gateways. In TCP/IP Gateway Address, type the IP address of the default gateway in Gateway. To manually configure a default metric (the number of transmission hops), clear the Automatic metric check box and type a metric in Metric. [. . . ]