User manual SMC 7404WBRA

[. . . ] Barricade ADSL Router Wireless Broadband Router with built-in ADSL Modem N N N N N N N N N N Compatible with all leading DSLAMs Firewall (hacker attack logging, DoS, and client filtering) Supports DMT line modulation Four auto-negotiating 10/100 Ethernet ports Built-in print server PPTP, L2TP, and IPSec pass through Multiple user Internet access with a single-user account Supports PPPoE and PPPoA Plug & Play installation Web-based management User Guide SMC7404WBRA EU Wireless Broadband Router with built-in ADSL Modem From SMC's line of award-winning connectivity solutions 38 Tesla Irvine, CA 92618 Phone: (949) 679-8000 January 2003 Part No: 750. 9077, UK 750. 9736 Pub No: 150000020800E R01 Information furnished is believed to be accurate and reliable. However, no responsibility is assumed by our company for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of our company. We reserve the right to change specifications at any time without notice. [. . . ] This method provides very little security as it is possible to learn the authentication key by watching RIP packets. MD5: MD5 is an algorithm that is used to verify data integrity through the creation of a 128-bit message digest from data input (which may be a message of any length) that is claimed to be as unique to that specific data as a fingerprint is to a specific individual. Authentication Code Password or MD5 Authentication key. RIP sends routing-update messages at regular intervals and when the network topology changes. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. RIP routers maintain only the best route to a destination. After updating its routing table, the router immediately begins transmitting routing updates to inform other network routers of the change. 4-36 ROUTING SYSTEM Routing Table Parameter Description Flags Indicates the route status: C = Direct connection on the same subnet. R = RIP (Routing Information Protocol) assigned route. I = ICMP (Internet Control Message Protocol) Redirect route. The subnetwork associated with the destination. This is a template that identifies the address bits in the destination address used for routing to specific subnets. Each bit that corresponds to a "1" is part of the network/subnet number; each bit that corresponds to "0" is part of the host number. Gateway Interface Metric The IP address of the router at the next hop to which matching frames are forwarded. The local interface through which the next hop of this route is reached. When a router receives a routing update that contains a new or changed destination network entry, the router adds 1 to the metric value indicated in the update and enters the network in the routing table. Network Address Netmask 4-37 CONFIGURING THE BARRICADE Note: Most modern routers support RIP-2 so there is usually no need for a static route table. Firewall The Barricade's firewall enables access control of client PCs, blocks common hacker attacks, including IP Spoofing, Land Attack, Ping of Death, IP with zero length, Smurf Attack, UDP port loopback, Snork Attack, TCP null scan, and TCP SYN flooding. The firewall does not significantly affect system performance and we advise leaving it enabled to protect your network. Note: When you check a radio button in the "Enable or disable Firewall module function" field, be sure to click the "APPLY" button. 4-38 FIREWALL Access Control 4-39 CONFIGURING THE BARRICADE Access Control allows users to define the outgoing traffic permitted or not-permitted through the WAN interface. The default is to permit all outgoing traffic. (See the following page for details. ) The Barricade can also limit the access of hosts within the local area network (LAN). The MAC Filtering Table allows the Barricade to enter up to 32 MAC addresses that are not allowed access to the WAN port. The following items are on the "Access Control" screen: Parameter Normal Filtering Table MAC Filtering Table Description Displays the IP address (or an IP address range) filtering table. Displays the MAC (Media Access Control) address filtering table. Note: Click "Add PC" and define the appropriate settings for client PC services (as shown on the following screen). 4-40 FIREWALL Access Control: Add PC 4-41 CONFIGURING THE BARRICADE URL Blocking The Barricade allows the user to block access to Web sites from a particular PC by entering either a full URL address or just a keyword. This feature can be used to protect children from accessing violent or pornographic Web sites. 4-42 FIREWALL Schedule Rule You may filter Internet access for local clients based on rules. Each access control rule may be activated at a scheduled time. [. . . ] 5 100-ohm UTP Wiring Conventions For Ethernet connections, a twisted-pair cable must have two pairs of wires. Each wire pair is identified by two different colors. For example, one wire might be red and the other, red with white stripes. Also, an RJ-45 connector must be attached to both ends of the cable. [. . . ]