Content rule templates

Content rules are applied to policy routes to provide specific instructions about what the security policy is looking for, and what to do when it triggers. When you create a content rule, you must select a Content Rule Template on which to base your rule.

Content rules look for conditions that match the What To Look For? clauses and apply the What To Do? actions that have been configured.

Choose your content rule template carefully, as it determines which What To Look For? clauses are included.

You can change the suggested What To Do? actions and add additional actions if required.

Clearswift Gateway provides the following Content Rule templates:

Template	What the rule does...	What to Look For? clauses	Default Disposal/Primary Action
Add Disclaimer	Adds an annotation (such as a disclaimer) to the message.	Always Trigger the Rule	Annotate the message
Add Disclaimer Conditionally	Detects messages with particular media types and expressions, and appends an annotation (such as a disclaimer) to the message. The lexical expression clause operates in conjunction with the selected media types in this content rule. The rule will only apply when the lexical expression is triggered in any attachment or part of a message that matches the media types you have selected.	Which Media Types, Lexical Expression	Annotate the message
All Traffic	Allows all traffic.	Always Trigger the Rule	Deliver/Continue
Analyze Properties	Analyzes document properties for specific lexical expressions.	Analyze Properties, Which Media Types, Size Restriction	Deliver/Continue
Archive to Server	Sends a copy of the message to a relay server.	Always Trigger the Rule	Send a Copy (Relay Server)
Attachment Count Restriction	Detects messages with an excessive number of attachments, based on a user-specified attachment limit.	Restrict the Number of Attachments	Deliver the message
Check Registered Data	Detects data that has been registered on the Information Governance Server.	Which Media Types, Classification Level The Classification Level specifically relates to values that are assigned to items that have been registered on an IG Server. The disposal action will trigger where content passing through the Gateway is matched to content registered on the IG Server, and where the Classification level for the item as set on the IG server is equal or exceeds the level set on the Gateway. If this value is set to 0 on your Gateway, matches to any IG registered items will trigger the disposal action., Scan text extracted from images (OCR)	Deliver/Continue
Detect Active Content	Detects active content (such as macros) in selected media types.	Which Media Types	Deliver/Continue
Detect Filenames	Detects and processes selected filenames based on Filename Lists.	Filename	Deliver/Continue
Detect Lexical Expression	Detects and processes unacceptable lexical expressions in selected media types. Note: If you want to scan scripts in the content, select the Scan Embedded Script option and use the Which Media Types clause to include a selection of media types. Note: If you want to scan text extracted from images using OCR, you must also select Scan body in the Lexical Expression clause.	Lexical Expression, Which Media Types, Size Restriction, Scan text extracted from Images (OCR)	Deliver/Continue
Detect Malformed Data	Detects content containing 'bad', corrupted, or malformed data.	Which media types	Hold in the Message Processing Failure area/ Allow the communication
Detect Media Types	Detects and processes selected media types.	Which Media Types, Size Restriction Filename	Deliver/Continue
Detect Spam	Detects spam using a selection of SpamLogic methods.	Spam Detection	Deliver the message
Detect Unacceptable Images	Detects messages with unacceptable images, based on a user-specified threshold.	Unacceptable Images	Deliver the message
Detect Virus	Detects viruses and Malware (including Sandboxing).	Virus Detection, Malware Outbreak Detection, Scan with sandbox	Hold in Virus area (if detected) Hold in Message Processing Failure area (if unsuccessful)
Digital Signature Validation	Detects valid digital signatures.	Digital Signature Validation	Hold in Message Processing Failure area
Encryption or Decryption Fails	Detects messages that have failed to be encrypted or decrypted.	Cryptographic Failure	Hold in Message Processing Failure area
Message Modification Fails	Detects and processes messages that the Gateway has not been able to modify.	Message has failed to be modified	Hold in Message Processing Failure area
Message Processing Fails	Detects messages that the Gateway has been unable to process.	Message has failed to be processed	Hold in Message Processing Failure area
Message Size Restriction	Detects messages that exceed a user-specified size limit.	Size Restriction	Deliver the message
Missing Manager	Detects messages that do not include the sender's manager when a manager relationship is defined.	Missing Manager Detection	No action (if detected) No action (if not in relationships list)
Redact Text	Detects unacceptable lexical expressions in selected media types. Attempts to redact content. Note: If you want to scan text extracted from images using OCR, you must also select Scan body in the Lexical Expression clause.	Lexical Expression, Which Media Types, Size Restriction, Bypass Rule, Scan text extracted from Images (OCR)	Deliver/Continue (if successful) Deliver the message (if unsuccessful)
Run External Command	Runs an executable program that performs processing on a file type that the Gateway does not support by default.	Which Media Type, Run External Command	No action (if detected) No action (if modified)
Sanitize Active Content	Detects active content (such as macros) in selected media types. Attempts to sanitize content.	Which Media Types, Bypass Rule	Deliver/Continue (if successful) Deliver the message (if unsuccessful)
Sanitize Document Content	Detects metadata and document properties in selected document areas and selected media types. Attempts to sanitize content.	Which Media Types, Bypass Rule, Contains Any Of The Following	Deliver/Continue (if successful) Deliver the message (if unsuccessful)
Sanitize Message	Detects messages containing URLs, hyperlinks, and active content in the message subject or body.	Which Message Types, Mode, HTML and RTF Email Bodies, URLs and Hyperlinks	No action (if detected) No action (if modified)
Send a Copy (BCC)	Sends copies of messages to a specified email address.	Always Trigger the Rule	No action
Structural Validation	Checks for appended data in certain format types.	Always Trigger the Rule	Deliver/Continue

Content rule templates

See also...