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+----------------------------------------------------------+
|            Symantec Messaging Gateway (SMG)               |
|                                                          |
|        **Product Overview, Functionalities, & Usage**     |
+----------------------------------------------------------+

Symantec Messaging Gateway (SMG) is a robust email security solution designed to protect organizations from email-borne threats such as malware, spam, phishing, and targeted attacks. It offers powerful filtering, data loss prevention, encryption, and virus scanning capabilities. SMG can be deployed as a hardware appliance or virtual machine, integrating seamlessly into enterprise environments.

**Key Functionalities**:
- **Anti-Spam and Malware Filtering**: Protects the network from email-based threats such as spam, phishing, and malware.
- **Content Filtering**: Allows creating policies to filter email messages based on content, attachments, or specific keywords.
- **Data Loss Prevention (DLP)**: Helps prevent sensitive data from being accidentally or maliciously leaked via email.
- **Message Encryption**: Provides secure delivery for confidential messages.
- **Reporting and Logging**: Offers extensive reporting for message tracking and system performance.

**Usage**: SMG is primarily used by IT administrators to secure email communication, enforce compliance policies, and prevent data breaches. It helps ensure that emails are clean and do not contain malicious content.

**Recommendations**:
- Regularly update virus definitions and software to keep up with evolving threats.
- Use content filtering rules to enforce organizational email policies.
- Monitor system performance and email traffic regularly to optimize mail flow.
- Maintain backups and regularly export logs for auditing and troubleshooting.

+----------------------------------------------------------+
|                 Most Common Tasks (How-To)               |
+----------------------------------------------------------+

[ 1. Check Email Queue Status ]
------------------------------------------------------------
- **Purpose**: To view the current status of the email queue and see if there are any delays or stuck emails.
- **Steps**:
   1. In the Web UI, go to: `Status > Message Queues`.
   2. Check the different queues (Inbound, Outbound, Delivery).
   3. To manually release messages, select the queue and release or delete specific messages as needed.
   
[ 2. Add a Content Filtering Rule ]
------------------------------------------------------------
- **Purpose**: To create a new rule to filter emails based on certain content or conditions.
- **Steps**:
   1. In the Web UI, navigate to: `Content > Policies > Email Content Filtering`.
   2. Click "Add" to create a new rule.
   3. Define conditions, such as keywords, attachments, or specific users, and specify actions (e.g., quarantine, reject).
   4. Save the rule and test with sample emails.
   
[ 3. View Message Tracking and Logs ]
------------------------------------------------------------
- **Purpose**: To track specific messages and analyze logs for troubleshooting.
- **Steps**:
   1. In the Web UI, go to: `Status > Message Audit Logs`.
   2. Use the filters to search by sender, recipient, or message ID.
   3. View the log details to trace the flow and outcome of the message.
   4. For deeper analysis, use the CLI:
      - Command: `tail -f /data/logs/scanner/mta/smtp.log` (to view SMTP logs).
      
[ 4. Update Virus Definitions ]
------------------------------------------------------------
- **Purpose**: To ensure the system is using the latest virus definitions.
- **Steps**:
   1. In the Web UI, navigate to: `Administration > Version`.
   2. Click on "Check for Updates" under virus definitions.
   3. If updates are available, click "Install".
   4. Alternatively, from CLI, run the following command:
      - Command: `liveupdate`.
      
[ 5. Backup Configuration ]
------------------------------------------------------------
- **Purpose**: To backup the configuration for disaster recovery or migration.
- **Steps**:
   1. In the Web UI, navigate to: `Administration > Backup/Restore`.
   2. Click on "Backup Now".
   3. Download the backup file and store it in a secure location.
   4. You can also schedule automated backups from this section.
   
[ 6. Release Quarantined Emails ]
------------------------------------------------------------
- **Purpose**: To manually release or delete messages that have been quarantined by the system.
- **Steps**:
   1. In the Web UI, go to: `Status > Quarantine`.
   2. Select the quarantined messages you want to release or delete.
   3. Click "Release" to send the message to its intended recipient or "Delete" to remove it.
   
[ 7. Add a New Admin User ]
------------------------------------------------------------
- **Purpose**: To create a new administrative user with specific roles and permissions.
- **Steps**:
   1. In the Web UI, navigate to: `Administration > Control Center > Administrators`.
   2. Click "Add".
   3. Define the username, password, and assign the necessary permissions (e.g., full admin or limited access).
   4. Click "Save" to create the user.
   
[ 8. Set Up Message Encryption ]
------------------------------------------------------------
- **Purpose**: To ensure confidential messages are securely transmitted.
- **Steps**:
   1. In the Web UI, navigate to: `Content > Policies > Email Encryption`.
   2. Click "Add" to create a new encryption policy.
   3. Define conditions under which emails should be encrypted (e.g., for specific recipients, subject, or content).
   4. Save and test the policy by sending encrypted messages.
   
+----------------------------------------------------------+
|               Symantec Messaging Gateway (SMG)            |
|                       Administration                     |
+----------------------------------------------------------+

[ Login to SMG CLI ]
------------------------------------------------------------
1. SSH into the appliance
   Command: `ssh admin@<SMG-IP>`
   
2. Enter your admin credentials.

[ Common SMG CLI Commands ]
------------------------------------------------------------
1. Check the system status:
   Command: `status`
   
2. View disk usage:
   Command: `df -h`
   
3. Reboot appliance:
   Command: `reboot`
   
4. Restart services:
   Command: `service control restart`
   
[ Certificate Management ]
------------------------------------------------------------
1. Import Certificate via CLI:
   - Copy the certificate to the SMG using SCP:
     Command: `scp certfile admin@<SMG-IP>:/var/tmp/`
      
   - Import the certificate:
     Command: `cert import <certname>`
      
   - Apply the certificate to services:
     Command: `cert apply <certname>`
      
2. Import Certificate via Web UI:
   - Navigate to: `Administration > Certificates`
   - Click "Add Certificate" and upload your certificate file.
   - After import, assign the certificate to the desired services.
   
[ User Management ]
------------------------------------------------------------
1. Create New Admin User:
   Command: `add-admin-user <username> <password>`
   
2. Modify Existing User:
   Command: `modify-admin-user <username> <new-password>`
   
3. Delete Admin User:
   Command: `delete-admin-user <username>`
   
[ Rule Management ]
------------------------------------------------------------
1. Create new Content Filtering Rule via Web UI:
   - Go to: `Content > Policies > Email Content Filtering`
   - Click "Add" and define conditions and actions for the rule.
   
2. View all active rules from CLI:
   Command: `content-filter list`
   
3. Enable or disable a rule:
   Command: `content-filter enable <rule-id>`
   Command: `content-filter disable <rule-id>`
   
[ Log Management ]
------------------------------------------------------------
1. View Mail Logs:
   Command: `tail -f /data/logs/scanner/mta/smtp.log`
   
2. View Audit Logs:
   Command: `tail -f /data/logs/audit.log`
   
3. View Brightmail Engine Logs:
   Command: `tail -f /data/logs/brightmail.log`
   
4. Export logs:
   Command: `log export <log-type> /path/to/export/`
   
[ System Updates ]
------------------------------------------------------------
1. Update Virus Definitions (via CLI):
   Command: `liveupdate`
   
2. Check for Software Updates:
   Command: `version --check`
   
3. Install Software Updates:
   Command: `version --install <package>`
   
4. Rollback to previous version:
   Command: `version --rollback`
   
+----------------------------------------------------------+


Most Common Tasks (How-To) Summary:

   •	Check Email Queue Status: Monitor mail flow and resolve stuck messages.
   •	Add a Content Filtering Rule: Set up rules to filter emails based on content.
   •	View Message Tracking and Logs: Track messages and analyze logs for troubleshooting.
   •	Update Virus Definitions: Keep virus definitions up-to-date for better protection.
   •	Backup Configuration: Safeguard the current system setup for recovery.
   •	Release Quarantined Emails: Manually handle emails caught in quarantine.
   •	Add a New Admin User: Create users with administrative rights and custom roles.
   •	Set Up Message Encryption: Securely transmit sensitive email messages.