Multitech MTPSR1-120 manual Appendix A - TCP/IP Description

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Appendix A - TCP/IP Description

Appendix A - TCP/IP Description

UDP, described in RFC 768 (http://info.internet.isi.edu:80/in-notes/rfc/files/rfc768.txt) provides an end-to-end datagram (connectionless) service. Some applications, such as those that involve a simple query and response, are better suited to the datagram service of UDP because there is no time lost to virtual circuit establishment and termination. UDP’s primary function is to add a port number to the IP address to provide a socket for the application.

The Application Layer protocols are examples of common TCP/IP applications and utilities, which include:

•Telnet (Telecommunication Network): a virtual terminal protocol allowing a user logged on to one TCP/IP host to access other hosts on the network, described in RFC 854 (http:// info.internet.isi.edu:80/in-notes/rfc/files/rfc854.txt).

•FTP: the File Transfer Protocol allows a user to transfer files between local and remote host computers per RFC 959 (http://info.internet.isi.edu:80/in-notes/rfc/files/rfc959.txt).

•Archie: a utility that allows a user to search all registered anonymous FTP sites for files on a specified topic.

•Gopher: a tool that allows users to search through data repositories using a menu-driven, hierarchical interface, with links to other sites, per RFC 1436 (http://info.internet.isi.edu:80/in- notes/rfc/files/rfc1436.txt).

•SMTP: the Simple Mail Transfer Protocol is the standard protocol for the exchange of electronic mail over the Internet, per RFC 821 (http://info.internet.isi.edu:80/in-notes/rfc/files/ rfc821.txt).

•HTTP: the Hypertext Transfer Protocol is the basis for exchange of information over the World Wide Web (WWW). Various versions of HTTP are in use over the Internet, with HTTP version 1.0, per RFC 1945 (http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1945.txt) being the most current.

•HTML: WWW pages are written in the Hypertext Markup Language (HTML), an ASCII-based, platform-independent formatting language, per RFC 1866 (http://info.internet.isi.edu:80/in- notes/rfc/files/rfc1866.txt).

•Finger: used to determine the status of other hosts and/or users, per RFC 1288 (http:// info.internet.isi.edu:80/in-notes/rfc/files/rfc1288.txt).

•POP: the Post Office Protocol defines a simple interface between a user’s mail reader software and an electronic mail server; the current version is POP3, described in RFC 1460 (http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1460.txt).

•DNS: the Domain Name System defines the structure of Internet names and their association with IP addresses, as well as the association of mail, name, and other servers with domains.

•SNMP: the Simple Network Management Protocol defines procedures and management information databases for managing TCP/IP-based network devices. SNMP, defined by RFC 1157 (http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1157.txt) is widely deployed in local and wide area network. SNMP Version 2 (SNMPv2), per RFC 1441 (http://info.internet.isi.edu:80/ in-notes/rfc/files/rfc1441.txt) adds security mechanisms that are missing in SNMP, but is also more complex.

•Ping: a utility that allows a user at one system to determine the status of other hosts and the latency in getting a message to that host. Ping uses ICMP Echo messages.

•Whois/NICNAME: Utilities that search databases for information about Internet domain and domain contact information, per RFC 954 (http://info.internet.isi.edu:80/in-notes/rfc/files/ rfc954.txt).

•Traceroute: a tool that displays the route that packets will take when traveling to a remote host.

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Contents User Guide Dual Ethernet ProxyServer Model MTPSR1-120Record of Revisions RevisionDescription User GuidePatents TRADEMARKChapter 3 - Software Loading and Configuration Chapter 2 - InstallationChapter 1 - Introduction and Description Chapter 4 - Firewall SoftwareChapter 6 - Warranty, Service and Tech Support Chapter 5 - Remote Configuration and ManagementAppendixes IndexChapter 1 - Introduction and Description Chapter 3 - Software Loading and Configuration Chapter 2 - InstallationIntroduction Preview of this GuideChapter 6 - Warranty, Service and Tech Support Chapter 5 - Remote Configuration and ManagementChapter 4 - ProxyServer Software AppendixesFront Panel Description PowerETHERNET 1 and WAN LinkEthernet 1 and 2 10Base-T Connectors RS232/V.35 ConnectorCommand Connector Power ConnectorCommand Port SpecificationsEthernet Ports WAN LinkChapter 2 - Installation Safety Warnings Unpacking Your ProxyServerFigure 2-1. Unpacking Step Procedure V.35 Shunt ProcedureFigure 2-2. Cabinet Mounting Screw Figure 2-3. Shunt PositionsCabling Procedure Step Procedure Cabling Your ProxyServerFigure 2-4. Cable Connections Chapter 2 - Installation Table 2-1. cont’d Step Procedure Dual Ethernet ProxyServer User Guide Chapter 3 - Software Loading and Configuration Loading Your Software 7. The “Do you want to download default setup?” dialog is displayed Chapter 3 - Software Loading and ConfigurationDHCP Relay Agent does not apply IP Port ConfigurationDefault WAN Link Configuration 19. The Writing Setup dialog box is displayed as the setup configuration is written to the ProxyServer Chapter 4 - Firewall Software Figure 4-1. Cable/DSL Modem Configuration Configuration 1 - Cable/DSL ModemTypical Applications Private LANChapter 4 - Firewall Software Figure 4-2. Existing Dual-LAN with Router Configuration Configuration 2 - Existing Dual-LAN with RouterInternet Services Network Private LANFigure 4-3. New Dual-LAN with T1 DSU Configuration Configuration 3 - New Dual-LAN with T1 DSUThe Internet LAN Port Parameters group is either configured with the DHCP Client option active, enabling the ISP to dynamically provide the registered Internet IP addresses, or with the DHCP Client option disabled if a static IP addressing scheme is provided by the ISP. If the DHCP Client field is deactivated the static IP Address of 204.26.12.10 is then entered and the WAN option is checked in the Internet Gateway Parameters group Configuration Port Setup Download Default SetupFirewall Program Group Download Firmware Update Uninstall Firewall ConfigurationWAN Device Configuration Firewall Configuration Changing IP Parameters Net Mask - Enter the Subnetwork Mask for the WAN port in this field Changing WAN Port Parameters Adding Proxy Applications Enabling the DHCP Server Chapter 5 - Remote Configuration and Management Enabling PPP/SLIPEnabling PPP Enabling SLIP Statistics ApplicationsFiltering Chapter 5 - Remote Configuration and Management Connect the modem to your local telephone line Modem-Based Remote Configuration ProcedureClick OK when you are satisfied with your selections Windows Sockets Compliant TCP/IP Stack LAN-Based Remote Configuration Procedure8 Click Exit when the downloading is complete Telnet Remote ManagementFirewall Configuration Firewall Management MenuThe Firewall Management Menu provides two basic options Firewall Configuration and WAN Device Configuration. A further option enables you to close the Telnet session from this menu by pressing the Esc key WEB Management Chapter 6 - Warranty, Service and Tech Support On-line Warranty Registration Limited WarrantyChapter 6 - Warranty, Service and Technical Support Tech SupportRecording ProxyServer Information Service ATTN SERVICE OR REPAIRSMULTI-TECH SYSTEMS, INC 2205 WOODALE DRIVE MOUNDS VIEW, MINNESOTA To Log on to the Multi-Tech BBS The Multi-Tech BBSTo Download a File If you know the file nameAbout CompuServe About the Multi-Tech Fax-Back ServiceAbout the Internet ftp//ftp.multitech.comAppendixes Dual Ethernet ProxyServer User Guide Appendix A - TCP/IP Description Internet Protocol IP Index F Configuration 3 - New Dual-LAN with T1 DSU Configuration 2 - Existing Dual-LAN with Router26Secured LAN Port Parameters 20, 33
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