User manual SMC 7404BRA FRT

[. . . ] 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 SMC7404BRA EU Broadband Router with built-in ADSL Modem From SMC's line of award-winning connectivity solutions December 2002 Part No: 750. 9701, UK 750. 9735 Pub No: 150000035400A COMPLIANCES FCC - Class B This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with instructions, may cause harmful interference to radio communications. However, there is no guarantee that the interference will not occur in a particular installation. [. . . ] Maximum number of incomplete TCP/UDP sessions from the same host. Defaults 180 sec Description The length of time for which an H. 323 session will be managed if there is no activity. Maximum 10 incomplete TCP/UDP sessions number from same host Incomplete TCP/UDP sessions detect sensitive time period Maximum half-open fragmentation packet number from same host Half-open fragmentation detect sensitive time period 300 msec Length of time before an incomplete TCP/UDP session is detected as incomplete. 30 Maximum number of half-open fragmentation packets from the same host. 10000 msec Length of time before a half-open fragmentation session is detected as half-open. Length of time from detecting a flood attack to blocking of the attack. Flooding cracker 300 sec block time 4-45 CONFIGURING THE BARRICADE DMZ If you have a client PC that cannot run an Internet application properly from behind the firewall, you can open the client up to unrestricted two-way Internet access. Enter the IP address of a DMZ (Demilitarized Zone) host on this screen. Adding a client to the DMZ may expose your local network to a variety of security risks, so only use this option as a last resort. 4-46 SNMP SNMP Community Use the SNMP configuration screen to display and modify parameters for the Simple Network Management Protocol (SNMP. ) A computer attached to the network, called a Network Management Station (NMS), can be used to access this information. Access rights to the agent are controlled by community strings. To communicate with the Barricade, the NMS must first submit a valid community string for authentication. Parameter Community Access Valid Note: Description A community name authorized for management access. Management access is restricted to Read only (Read) or Read/Write (Write. ) Enables/disables the entry. Up to 5 community names may be entered. 4-47 CONFIGURING THE BARRICADE Trap Parameter IP Address Community Description Traps are sent to this address when errors or specific events occur on the network. A community string (password) specified for trap management. Enter a word, something other than public or private, to prevent unauthorized individuals from reading information on your system. Sets the trap status to disabled, or enabled with V1 or V2c. The v2c protocol was proposed in late 1995 and includes enhancements to v1 that are universally accepted. These include a get-bulk command to reduce network management traffic when retrieving a sequence of MIB variables, and a more elaborate set of error codes for improved reporting to a Network Management Station. Version 4-48 ADSL ADSL Parameters Parameter Operation Mode Description · · · Automatic ETSI DTS/TM-06006 standard. G. 992. 1 standard Address 3C etc. Reserved. 4-49 CONFIGURING THE BARRICADE Status 4-50 ADSL Parameter Status Line Status Data Rate Upstream Downstream Operation Data/ Defect Indication Noise Margin Description Shows the current status of the ADSL line. Actual and maximum downstream data rate. Upstream: Minimum noise margin upstream. Downstream: Minimum noise margin downstream. Output Power Attenuation Upstream: Maximum reduction in the strength of the upstream signal. Downstream: Maximum reduction in the strength of the downstream signal. Fast Path FEC Correction There are two latency paths that may be used: fast and interleaved. For either path a forward error correction (FEC) scheme is employed to ensure higher data integrity. For maximum noise immunity, an interleaver may be used to supplement FEC. An interleaver is basically a buffer used to introduce a delay, allowing for additional error correction techniques to handle noise. [. . . ] SMC is responsible for return shipping charges from SMC to customer. i LIMITED WARRANTY WARRANTIES EXCLUSIVE: IF A SMC PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT OF THE PRODUCT IN QUESTION, AT SMC'S OPTION. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESSED OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SMC NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE OR USE OF ITS PRODUCTS. SMC SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD. [. . . ]