SMCD3G Cable Modem Gateway User Manual

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Configuring Your Gateway Figure 25. Customer Defined Filter Menu Table 12. Customer Defined Filter Menu Options Option Description Name Name for identifying the custom service. The name is for reference purposes only. Type The type of protocol you want to filter. Choices are TCP, UDP, and TCP/UDP. Default is TCP. LAN IPs Lets you apply the filter to any LAN IP addresses, a single LAN IP address, or a range of LAN IP addresses. Start IP To specify: • A single remote IP address, enter the remote IP address. • A range of remote IP addresses, enter the starting IP address here and the ending IP address range in the next field. This field is unavailable if the Gateway is configured for any remote IP addresses. From Port Starting port number on which the filter will be applied. If necessary, contact the application vendor for this information. To Port Ending port number on which the filter will be applied. If necessary, contact the application vendor for this information. 46 SMCD3G Cable Modem Gateway User Manual
Configuring Special Applications Configuring Your Gateway Using the Special Application menu, you can configure your Gateway to detect port triggers for detect multiple-session applications and allow them to pass the firewall. For special applications, besides the initial communication session, there are multiple related sessions created during the protocol communications. Normally, a normal treats the triggered sessions as independent sessions and blocks them. However, your Gateway can co-relate the triggered sessions with the initial session and group them together in the NAT session table. As a result, you need only specify which protocol type and port number you want to track, as well as some other related parameters. In this way, the Gateway can pass the special applications according to the supplied information. Assume, for example, that to use H.323 in a Net Meeting application, a local client starts a session A to a remote host. The remote host uses session A to communicate with the local host, but it also could initiate another session B back to the local host. Since there is only session A recorded in the NAT session table when the local host starts the communication, session B is treated as an illegal access from the outside and is blocked. Using the Special Application menu, you can configure the Gateway to co-relate sessions A and B and automatically open the port for the incoming session B. The maximum allowed triggers is 50. To enable/disable the special application function, users can check/uncheck the Enable Triggering checkbox and press the APPLY icon to make it effective without reboot. To display the Special Applications menu, click Firewall in the menu bar and then click the Special Application submenu. Figure 26 shows an example of the menu. 47 SMCD3G Cable Modem Gateway User Manual
Page 2 and 3: SMC Networks 20 Mason Irvine, CA. 9
Page 4 and 5: Contents System Settings Menu......
Page 6 and 7: Key Features Preface The following
Page 8 and 9: Typographic Conventions Preface Thi
Page 10 and 11: Unpacking Package Contents Getting
Page 12 and 13: Getting to Know Your Gateway Table
Page 14 and 15: 2 Installing Your Gateway This chap
Page 16 and 17: Installing Your Gateway Figure 4. C
Page 18 and 19: Configuring Your Computer for TCP/I
Page 24 and 25: Pre-configuration Guidelines Before
Page 26 and 27: Configuring Your Gateway Accessing
Page 28 and 29: Configuring Your Gateway Web Manage
Page 30 and 31: Password Settings Menu Configuring
Page 32 and 33: LAN Settings Menu Configuring Your
Page 34 and 35: Configuring Your Gateway 4. To conf
Page 36 and 37: Configuring Your Gateway 5. To chan
Page 38 and 39: Security Settings (Firewall) Menu C
Page 40 and 41: Configuring Your Gateway 4. Click A
Page 42 and 43: Configuring Your Gateway Defined Ac
Page 44 and 45: Configuring Your Gateway 5. To defi
Page 48 and 49: To enable port triggering: Configur
Page 50 and 51: Configuring Your Gateway Table 13.
Page 52 and 53: Configuring Schedule Rules Configur
Page 54 and 55: Configuring Email Alerts Configurin
Page 56 and 57: Configuring DMZ Settings Configurin
Page 58 and 59: Viewing Status Information Configur
Page 60 and 61: Standards � 802.3 10BaseT Etherne
Page 62 and 63: Transmitter � Modulation: - TDMA:
Page 64 and 65: FCC Interference Statement Appendix
Page 66 and 67: Index F L Factory defaults LAN conn

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