User manual ZYXEL PRESTIGE 1400

[. . . ] Prestige 1400 WAN Router with Integrated Ethernet Switch ZyNOS Version 3. 20 February 2001 User's Guide Prestige 1400 WAN Router with Integrated Ethernet Switch Prestige 1400 WAN Router with Integrated Ethernet Switch Copyright Copyright © 2000 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. [. . . ] Device rules act on the raw data from/to LAN and WAN. Protocol filter rules act on the IP packets. Device and TCP/IP filter rules are discussed in more detail in the next section. When NAT (Network Address Translation) is enabled, the inside IP address and port number are replaced on a connection-by-connection basis, which makes it impossible to know the exact address and port on the wire. Therefore, the Prestige applies the protocol filters to the "native" IP address and port number before NAT for outgoing packets and after NAT for incoming packets. On the other hand, the device Filter Configuration 9-5 Prestige 1400 WAN Router with Integrated Ethernet Switch filters are applied to the raw packets that appear on the wire. They are applied at the point when the Prestige is receiving and sending the packets; i. e. The interface can be an Ethernet port or any other hardware port. The following diagram illustrates this. Figure 9-5 Protocol and Device Filter Sets To speed up filtering, all rules in a filter set must be of the same type, i. e. , protocol filters or device filters. The class of a filter set is determined by the first rule that you create. When applying the filter sets to a port, separate menu fields are provided for protocol and device filter sets. If you include a protocol filter set in a device filters field or vice versa, the Prestige will warn you and will not allow you to save. 9. 5. 1 TCP/IP Filter Rule This section shows you how to configure a TCP/IP filter rule. TCP/IP rules allow you to base the rule on the fields in the IP and the upper layer protocol, e. g. , UDP and TCP, headers. To configure a TCP/IP rules, select TCP/IP Filter Rule from the Filter Type field and press Enter to open Menu 21. 1. 1 - TCP/IP Filter Rule, as shown next. 9-6 Filter Configuration Prestige 1400 WAN Router with Integrated Ethernet Switch Menu 21. 1. 1 - TCP/IP Filter Rule Filter #: 1, 1 Filter Type= TCP/IP Filter Rule Active= Yes IP Protocol= 6 IP Source Route= No Destination: IP Addr= 0. 0. 0. 0 IP Mask= 0. 0. 0. 0 Port #= 137 Port # Comp= Equal Source: IP Addr= 0. 0. 0. 0 IP Mask= 0. 0. 0. 0 Port #= 0 Port # Comp= None TCP Estab= No More= No Log= None Action Matched= Check Next Rule Action Not Matched= Check Next Rule Press ENTER to Confirm or ESC to Cancel: Press Space Bar to Toggle. Figure 9-6 Menu 21. 1. 1 - TCP/IP Filter Rule The following table describes how to configure your TCP/IP filter rule. Table 9-4 TCP/IP Filter Rule Menu Fields FIELD Filter # DESCRIPTION This is the filter set, filter rule co-ordinates, i. e. , 2, 3 refers to the second filter set and the third filter rule of that set. Press [SPACE BAR] to toggle between types of rules. Parameters displayed below each type will be different. This field activates/deactivates the filter rule. Protocol refers to the upper layer protocol, e. g. , TCP is 6, UDP is 17 and ICMP is 1. Enter 0 if IP protocol is don't care. If Yes, the rule applies to packet with IP source route option; else the packet must not have source route option. The majority of IP packets do not have source route. [. . . ] xvii System Related Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B System Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7, 3-8, 11-1 Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 System Status Route Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3 WAN/LAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2 System Up Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]