PMDF System Manager's Guide

Chapter 26
26	Other Channels
26.1	Addressing Channels
26.1.1	Channel Operation
26.1.2	Examples
26.1.3	Setting Up the Channel
26.1.3.1	Adding the Channel to the Configuration File
26.1.3.2	Option Files
26.2	Bitbucket Channel
26.2.1	Configuration
26.3	Defragmentation Channel
26.3.1	Defragmentation Channel Definition and Rewrite Rules
26.3.2	Defragmentation Channel Retention Time
26.4	Pager Channels
26.4.1	Setting Up the Channel
26.4.1.1	Before You Start
26.4.1.2	Adding the Channel to the Configuration File
26.4.1.3	PAGER Mapping
26.4.1.4	Modem Script
26.4.1.5	Option Files
26.4.1.6	Use with PET Switches
26.4.1.7	A Word on Determining Channel Options by Trial and Error
26.4.1.8	Frequent Delivery Retries with the BACKOFF Option
26.4.1.9	Using a Directory Channel to Simplify Pager Addresses
26.4.2	Pager Channel Addresses
26.4.2.1	The Contents of the Attribute-value Pair List (AVPL)
26.4.2.2	Examples of Pager Channel Addresses
26.4.3	Pager Channel Logging
26.4.4	Identifying Troublesome Modems
26.5	Pipe Channels (OpenVMS and UNIX)
26.5.1	Setting Up the Channel
26.5.1.1	Adding the Channel to the Configuration File
26.5.1.2	Profile Database Entries for Pipe Channel Addressees (UNIX only)
26.5.1.3	Pipe Database
26.5.1.4	Option Files
26.5.2	The Order in Which Entries are Checked
26.5.3	Example Usage
26.6	Printer Channels
26.6.1	Setting Up the Channel
26.6.1.1	Adding the Channel to the Configuration File
26.6.1.2	Option Files
26.6.1.3	Controlling the Print Command (UNIX)
26.6.1.4	Handling Multipart Messages
26.6.2	Printer Channel Addresses
26.6.2.1	The Contents of the Attribute-value Pair List, AVPL
26.6.2.2	Quoting the AVPL
26.6.2.3	Examples of Printer Channel Addresses
26.6.3	Logging
26.6.4	A PostScript Printer Channel
26.6.5	Security Considerations
26.6.5.1	Security Considerations on OpenVMS Systems
26.6.5.2	Security Considerations on UNIX Systems
26.7	Processing and Reprocessing Channels
26.7.1	Process Channel Definition and Rewrite Rules
26.7.2	Reprocess Channel Definition and Rewrite Rules
26.8	Generic SMTP Channels
26.9	DEC NOTES Channels (OpenVMS)
26.9.1	Setting Up the NOTES Channel
26.9.2	Using an Option File for the NOTES Channel
26.9.3	Further Control of the Subject Database
Chapter 27
27	The PMDF Queue to E-mail Symbiont (OpenVMS)
27.1	Symbiont Configuration
27.2	Option Files
27.3	Sending Mail with the Symbiont
27.4	Printing Documents from Word Processors
27.4.1	Adding PostScript Support
27.4.2	Character Set Handling
Chapter 28
28	E-mail Firewalls and Other E-mail Security Considerations
28.1	What is an e-mail Firewall?
28.1.1	The e-mail Firewall Orientation
28.2	Preliminary Tasks Before Setting Up an e-mail Firewall
28.2.1	Have an Internet Firewall in Place
28.2.2	Security and e-mail Policies
28.3	The PMDF Firewall Configuration Utility
28.4	Firewall Configuration Features
28.4.1	Separating Message Traffic
28.4.1.1	Separating SMTP Over TCP/IP Message Traffic
28.4.1.1.1	Sample Configuration with Separate TCP/IP Channels
28.4.1.2	The Case of an Internal Mailhub
28.4.1.2.1	Sample Configuration With an Internal Mailhub System
28.4.2	Postmaster Messages
28.4.3	Logging and Tracking Messages and Connections
28.4.3.1	Logging Messages Passing through PMDF
28.4.3.1.1	Extra Logging Detail
28.4.3.2	Snapshots of Message Traffic through PMDF
28.4.3.3	Monitoring TCP/IP Connections to the Dispatcher
28.4.4	Controlling Address Rewriting and Controlling Message Pathways
28.4.4.1	Sample Configuration Controlling Internal Domain Rewriting
28.4.5	Controlling e-mail Access
28.4.5.1	Staticly Controlling e-mail Access
28.4.5.2	Sidelining Messages for Manual Inspection
28.4.5.3	Dynamically Controlling e-mail Access, and Defending Against Denial of Service Attacks
28.4.6	Controlling External Stimulation of Message Delivery
28.4.7	Controlling e-mail Content and Message Priority
28.4.7.1	Imposing Message Size Limits
28.4.7.2	Message Priority and Size Limits
28.4.7.3	Imposing Message Sensitivity Limits
28.4.7.4	Filtering Based on Message Headers
28.4.7.5	Checking or Filtering Message Content
28.4.7.6	Verifying Message Integrity
28.4.8	Restricting or Controlling Information Emitted
28.4.8.1	Restricting Access to PMDF Information via the PMDF HTTP Server
28.4.8.2	SMTP Probe Commands
28.4.8.3	Internal Names in Received: Headers
28.4.8.4	Centralized Naming and Internal Addresses
28.5	Other Features and Techniques that can Impact an e-mail Firewall
28.5.1	General Performance Issues on an e-mail Firewall
28.5.2	Additional Channel Keywords
28.5.3	Rightslist Identifiers and Group ids
28.5.4	PMDF Options