LinuxCBT SendMail Edition d3xseeders: 11
leechers: 14
LinuxCBT SendMail Edition d3x (Size: 1.24 GB)
Description
Focus: Sendmail Version 8x MTA
Duration: 14 Hours Course Objective LinuxCBT Sendmail v8 Edition - Module I Sendmail - Installation Network & systems architecture review Download current Sendmail v8.x.x source files Import PGP-compatbile public keys Verify source archive against imported public keys Discuss required applications Install GNU C Compiler (GCC) and ancillary applications Backup existing Postfix implementation and prepare for Sendmail installation Explore Sendmail source tree - identify key components Configure & compile Sendmail Discuss M4 & CF configuration files (sendmail.{mc,cf}, submit.{mc,cf}) Discuss default Sendmail operating modes - MSP & MTA Prepare default Mail Submission Program (MSP) configuration based on MC Prepare default Mail Transfer Agent (MTA) configuration based on MC Install Berkeley DB libraries for hashed lookups Complete installation Explore post-installation Sendmail environment Sendmail - Mail Submission Program (MSP) mode Discuss local injection of messages Explain required Sendmail MSP shell arguments for queue-runner mode Start Sendmail in MSP mode Verify Operating System (OS) results using BASH exit status Verify monitored queue in MSP mode Examine resultant Sendmail MSP Process Identification (PID) file creation Kill running instance of Sendmail in MSP mode Invoke Sendmail queue-runner mode Inject test messages into the local queue Examine the queue files generated by Sendmail MSP Examine Syslog configuration using GREP Discuss Sendmail logging Identify Sendmail log files Examine specific Sendmail log entries using GREP Sendmail - Mail Transfer Agent (MTA) mode Discuss Sendmail's separation of duties; MSP/MTA Explain required shell arguments for Sendmail MTA mode Invoke Sendmail in MTA mode running as a daemon Confirm Sendmail running in MTA mode Force delivery of locally-injected messages Confirm delivery of queued messages Sendmail - Local Mail Discuss Sendmail's local delivery mechanism Explore & discuss legacy /var/spool/mail directory Identify user mbox files Discuss mbox permissions Illustrate local mail injection flow Use mutt MUA to retrieve locally delivered mail Use mutt to reply to envelope sender by local injection using MSP Identify local mailer (procmail) used by Sendmail MTA Invoke Sendmail in verbose mode Attempt delivery to valid and invalid users & examine output Explain Sendmail verbose-mode transcript (local vs. remote) Sendmail - Logs Discuss Syslog semantics (facilities & levels) Discuss log rotation Examine logs & discuss entries Parse logs for interesting entries Identify sourced messages Discuss record types (receipt vs. delivery attempt(s)) Follow the message trail based on queue ID Explain Sendmail fields Identify PID related to various delivery attempts Identify total delivery time and transfer time Sendmail - Aliases Discuss aliases applications Identify aliases database Explain Sendmail's aliases expansion logic Discuss the default aliases - (mailer-daemon, postmaster, etc.) Test delivery to defined aliases Define additional aliases Rebuild aliases database using newaliases to route messages accordingly Verify deliverablility of aliases database entries Test delivery of messages to newly-defined aliases Examine Sendmail logs to view transcript of delivery to aliased user Explain the different types of supported Sendmail aliases Define lists using aliases - one-to-many mappings Test delivery to lists Define alias to deliver messages to mbox-compliant file Debug I/O errors related to Sendmail's attempt to write to mbox-compliant file Implement lists using file system includes Define piped aliases to redirect messages to the input stream of other applications Implement Sendmail's per-user.forward file for user-based message routing Setup aliases using pipes to the vacation program to enable auto-response Sendmail - Simple Mail Transfer Protocol (SMTP) Mail Discuss SMTP prerequisites Examine local name resolution configuration Confirm resolution of remote Sendmail server Identify available remote recipients Compose and deliver message to remote recipient Confirm receipt Reveal returned message headers using mutt MUA Disable message forwarding on remote host Confirm receipt of smtp-based messages Explain Sendmail's name resolution logic during delivery attempt Emulate Sendmail's name resolution logic to illustrate logic Demonstrate Sendmail delivering messages based on static HOSTS resolution Disable static name resolution for remote host Debug message delivery errors related to invalid name resolution Create DNS entry for remote server on primary DNS server Confirm DNS resolution using system tools Confirm mail delivery based on DNS resolution Sendmail - Mail Exchange (MX) based messaging Explain Sendmail's name resolution logic Use system tools to determine MX handler Attempt delivery to undefined MX handler Update DNS configuration to include MX & A records for second-level domain Attempt delivery to defined MX handler Confirm delivery based on MX resolution via logs and MUA Explain MX distances (priority) field Define additional MX host for second-level domain in DNS zone Test delivery to backup MX host for failover Sendmail - m4 Configuration Technique Discuss Sendmail.cf Explain advantages of using m4 Identify m4 templates in Sendmail source tree Explain m4 templates hierarchy Describe the structure of standard Sendmail m4-compliant files Use m4 to generate new Sendmail.cf file Increase logging verbosity Reload current instance of Sendmail and examine output Restrict the number of recipients Restrict the size of each message Use m4 to generate and test new configuration features Sendmail - Masquerading Discuss masquerading features and applications Explore default Sendmail masquerading configuration using MUA Alter Fully Qualified Domain Name (FQDN) of outbound messages using masquerading Regenerate Sendmail.cf using m4 technique Configure system to receive messages for new FQDN defined using masquerading Alter message envelope using masquerading feature Add Windows 2003 Host to DNS configuration & confirm resolution Masquerade outbound domain to reflect second-level domain Sendmail - Relay Control Discuss Sendmail's default relay rules Configure promiscuous relay & test consequences Relay mail to Internet-based host and confirm delivery using SSH Restrict relaying by defining relay domains Define & test file-based relay domains to permit hosts & subnets to relay Recompile Sendmail.mc using m4 technique Examine relaying with unresolvable domains Confirm relay to Internet-based host using relay domains and Windows 2003 Host Discuss benefits of using access db Define mc directives for access db invocation Create access db file using makemap Explore access db directives Discuss mailertable feature Define mailertable with forced SMTP routes Simulate DMZ-based MTA-front-end relaying messages to corporate back-end MTA Test results Confirm SMTP Auth pre-requisites Configure SMTP Auth support Recompile Sendmail to support SMTP Auth Test relaying from Outlook Express on Windows 2003 Host Sendmail - Smart Host Configuration Discuss Smart Host applications Configure Sendmail to use remote server as a Smart Host Rebuild configuration files Test local mail routing Test smart host routing Sendmail - Null Client Configuration Discuss Null Client applications Undefine Smart Host configuration Configure Sendmail as a null client Test mail routing as a null client Confirm forced SMTP route Sendmail - Virtual Domains Explain applications Define basic-global virtual domains applied to all mailboxes Update DNS configuration to route messages to appropriate Virtual Domain server Confirm delivery of messages to users at virtual domain Add new DNS zone for additional domain to route traffic accordingly Discuss virtual user tables applications Updated Sendmail.cf to include virtual user tables support Define virtual user domains hash Define virtual user maps Test delivery to various users at various domains Define and test a catchall address for a virtual domain Rebuild virtual user maps using makemap Relay virtual domains to remote recipients Sendmail - Malware Framework Discuss Malware Framework (MailScanner/ClamAV/SpamAssAssin) Dowload MailScanner Download Clam Anti-Virus (ClamAV) Download SpamAssAssin Clam Anti-Virus (ClamAV) Install requisite ClamAV components Compile & install ClamAV Identify key ClamAV binaries Update ClamAV configuration files for basic operation Update ClamAV definitions Invoke ClamAV as a daemon SpamAssAssin Installation Identify requisite SpamAssAssin components Compile & install SpamAssAssin Invoke SpamAssAssin as a daemon MailScanner Implementation Compile & install MailScanner Identify MailScanner-related directories Explore MailScanner's primary configuration Enable ClamAV & SpamAssAssin support Alter Sendmail queue configuration to support MailScanner Restart Sendmail Start MailScanner Test message delivery through malware framework Test sample Spam through malware framework Test sample Virus-laden file through malware framework Sendmail - Transport Layer Security (TLS) Configuration Discuss features & benefits Discuss clear-text implications & caveats Generate mail as a TLS client Confirm one-way encryption Generate PKI usage keys Configure & confirm TLS Server support Generate message responses Confirm bi-directional encryption Evaluate results Sharing WidgetAll Comments |
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