Perle Systems P840 manual IP Router Pattern Filtering, Protocol Discrimination

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Filtering

IP Router Pattern Filtering

Pattern filtering may be used on any portion of the IP frame. IP pattern filtering behaves the same as bridge pattern filtering, except the start of the IP frame is offset 0, because the IP router function of the bridge/router handles only the IP frame itself.

IP pattern filtering may use any combination of filtering operators as described in the bridge pattern filters.

Protocol Discrimination

Protocol discrimination may be required to prevent or limit the protocols within an IP frame that may traverse a routed Local Area Network.

In Local Area Networks, there may be many different Transport layer protocols that coexist within the IP Network layer. TCP, UDP, and ICMP are just a few of the common protocols in use today. Each of these protocols is encapsulated within an IP frame, and therefore is subject to the IP routing function. If you would like to discriminate against a particular protocol to prevent its usage of the routed LAN facilities the P840 router provides programmable filter masks that may be defined to act on any part of the IP frame.

The IP Router Filter Patterns menu is located under the Filter Set-Up Menu. Within the IP Router Filter Patterns Menu there exists a Help function that can be used as a reference during IP Router Filter Pattern creation. This Help function includes all of the logical operators that may be applied to the mask expression.

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Contents Perle P840 Introduction P840 RouterARP-Address Resolution Protocol IP Routing and the P840 RouterProxy ARP Complete IP Connection IP Header Details Redirect Icmp MessagesUnreachable QuenchPing Update MechanismRIP-Routing Information Protocol Time and Mask serverBridging and the P840 Router Initial Bridging ProcessStation Address Learning Aging Timer Filled Address Table Address PurgingAging Exception P840 Router Feature Definitions TelnetLink Compression Typical Compression Ratios by File Type Multilink WAN TopologiesBandwidth On Demand MultipointOperating Software Upgrades Time of Day Connect ApplicationP840 Isdn Connection Management Wide Area Network Topologies SupportedCall Establishment Methods Isdn Connection Management Auto-Call Time-of-Day ConnectionsAddress Connect Manual CallConnection Process CombinationSuspension Process Idle TimerProtocol Awareness Interesting TrafficP840 Session Participation Spoofing Suspended ServerIP Address Connect IP SpecificsTermination Process Suspension of TCP/IP SessionsConsole Connector Pinout InformationEvent Logs Event logsEvent Logs Event Logs Event Logs Event Logs Event Logs Alarm logs Event Logs Event Logs Event Logs Code Description Code Event Logs Event Logs Event Logs Event Logs Event Logs PPP Security logs MAC Address Filtering SecurityFiltering Security-Filter if DestinationSecurity-Filter if Source Security-Forward if Destination Filtering Security-Forward if SourceFiltering Pattern Filter Operators Bridge Pattern FilteringProtocol Discrimination Filter all IP Packets Protocol Type FieldInternet Protocol IP IP, and no moreFiltering Filter all IP without TCP traffic Transport Control Protocol / Internet Protocol TCP/IPFilter only TCP/IP Filter all except TCP/IPEthernet Broadcasting Bandwidth ConservationFilter all DEC Ethernet MulticastingGeneral Restrictions Internet AddressesEthernet Station Addresses Mask Combinations Mask would be 6-010203040506&12-0800&23-06 ExampleIP Router Pattern Filtering Frame Formats Ethernet Type Codes Octet Locations on an IP Routed TCP/IP Frame Octet Locations on a Bridged XNS Frame

P840 specifications

Perle Systems is renowned for its high-performance networking hardware, and the Perle P840 model exemplifies this reputation with its advanced features and technologies. Designed for small to medium-sized enterprises, the P840 serves as a versatile and reliable solution for connectivity needs.

One of the main features of the Perle P840 is its robust network performance, supporting both Ethernet and serial connectivity. With support for RS-232, RS-422, and RS-485 interfaces, the P840 enables seamless integration of legacy devices into modern network architectures, allowing businesses to leverage existing infrastructure without the need for extensive upgrades.

The P840 also boasts advanced security features to protect sensitive data during transmission. It supports SSL encryption and VPN capabilities, ensuring that data travels securely across the network. Additionally, it implements strong authentication protocols, providing organizations with peace of mind knowing that their communications are safeguarded against potential threats.

Another standout characteristic of the P840 is its flexibility in configuration. It offers multiple port configurations, allowing for customization based on specific user needs. With options for both managed and unmanaged modes, the device can easily adapt to various network environments. This flexibility makes it suitable for diverse applications, including industrial automation, process control, and telecommunications.

The Perle P840 is designed for durability and reliability, featuring a rugged enclosure that can withstand demanding environments. Its solid-state components reduce the risk of failure, contributing to increased uptime and lower maintenance costs. Furthermore, the compact design allows for easy installation in tight spaces, making it a practical choice for various deployment scenarios.

In terms of management and monitoring, the P840 includes an intuitive web-based interface, enabling administrators to configure settings and monitor network performance effortlessly. SNMP support further enhances management capabilities, allowing for integration into larger network management systems.

Overall, the Perle P840 stands out as a powerful solution for enterprises seeking seamless connectivity, robust security, and flexibility in configuration. Its combination of advanced features and durable design makes it an ideal choice for industries requiring reliable serial and network connectivity in challenging environments. With the P840, businesses can build a resilient networking infrastructure that supports their growing demands while safeguarding their critical data.
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