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Managing Messages > Enforced TLS connections
Enforced TLS connections
Administrator Help | TRITON AP-EMAIL | Version 8.1.x
You can specify that connections to or from a specific IP or domain group use mandatory Transport Layer Security (TLS) and determine the security level used by that connection. Use the Settings > Inbound/Outbound > Enforced TLS Connections page to specify the IP addresses or domain groups for which TLS connections are forced.
You define connection directions relative to the email SMTP server. Incoming connections are those from a protected or external domain or IP address group to the email protection system. Outgoing connections are those from the email system to a protected or external domain or IP address group.
After you define a group, you can change its order in the incoming or outgoing direction list. Select the group by marking its associated check box and use the Move Up or Move Down button to modify list order.
Delete a group by marking the check box and clicking Delete.
You may configure up to 32 incoming or outgoing connections.
Use the following steps to add an incoming or outgoing connection for which you want to use TLS:
1.
Click Add.
2.
Enter a name for your enforced TLS connection.
3.
Select a priority order for the connection in the Priority order drop-down list.
4.
Specify the security level for that connection. Security level options include the following:
*
Encrypt, the minimum enforcement level, used in all security levels
This security level is the only option available for incoming connections.
*
Encrypt and check CN, validation of a certificate's common name
*
Verify, validation that the certificate is from a trusted CA
*
Verify and check CN, validation of the certificate's common name and that the certificate is from a trusted CA
* 
Important 
To use the 2 "verify" options, you must have imported a trusted CA certificate. See Managing Transport Layer Security (TLS) certificates for information about trusted certificates.
5.
Select 1 of the following connection encryption strength options:
*
Medium, which involves the use of cipher suites that use 128-bit encryption
*
High, which includes most cipher suites with key lengths larger than 128 bits
6.
Define the IP address or domain group subject to forced TLS connection. Select 1 of the following options:
*
Any (for all connections). This option applies to any connection, regardless of IP or domain address.
*
IP address group. Select an existing IP address group in the drop-down list or create a new group using Add New IP Group.
*
Domain address group. Select an existing domain address group in the drop-down list or create a new group using Add New Domain Group.
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Managing Messages > Enforced TLS connections