DATA_SSL_CIPHER_LIST - UCMD Server configuration option
Description
The DATA_SSL_CIPHER_LIST option specifies one or more SSL/TLS cipher suites that are acceptable to use for network communications on the data session, which is used for standard I/O file transmission.
Usage
Method | Syntax | IBM i | UNIX | Windows | z/OS |
|---|---|---|---|---|---|
Configuration File Keyword | data_ssl_cipher_list cipherlist | ||||
Manager Override | n/a |
Values
cipherlist is a comma-separated list of SSL/TLS cipher suites. The following table identifies the list of SSL/TLS cipher suites supported for this option.
The list is in default order, with the most preferred suite first and the least preferred suite last.
Cipher Suite | Description |
|---|---|
AES256-GCM-SHA384 | 256-bit AES encryption in Galois Counter Mode, SHA-2 384-bit message digest. |
AES256-SHA | 256-bit AES encryption with SHA-1 message digest. |
AES128-GCM-SHA256 | 128-bit AES encryption in Galois Counter Mode, SHA-2 256-bit message digest. |
AES128-SHA | 128-bit AES encryption with SHA-1 message digest. |
ECDHE-RSA-AES256-GCM-SHA384 | Ephemeral Elliptic Curve Diffie-Hellman Key Exchange, RSA authentication, 256-bit AES encryption in Galois Counter Mode, SHA-2 384-bit message digest. |
ECDHE-ECDSA-AES256-GCM-SHA384 | Ephemeral Elliptic Curve Diffie-Hellman Key Exchange, ECDSA authentication, 256-bit AES encryption in Galois Counter Mode, SHA-2 384-bit message digest. |
ECDHE-RSA-AES128-GCM-SHA256 | Ephemeral Elliptic Curve Diffie-Hellman Key Exchange, RSA authentication, 128-bit AES encryption in Galois Counter Mode, SHA-2 256-bit message digest. |
ECDHE-ECDSA-AES128-GCM-SHA256 | Ephemeral Elliptic Curve Diffie-Hellman Key Exchange, ECDSA authentication, 128-bit AES encryption in Galois Counter Mode, SHA-2 256-bit message digest. |
RC4-SHA | 128-bit RC4 encryption with SHA-1 message digest. |
RC4-MD5 | 128-bit RC4 encryption with MD5 message digest. |
DES-CBC3-SHA | 128-bit Triple-DES encryption with SHA-1 message digest. |
NULL-SHA256 | No encryption and SHA-2 256-bit message digest. |
NULL-SHA | No encryption and SHA-1 message digest. |
NULL-MD5 | No encryption and MD5 message digest. |
To configure the UCMD Server to accept only encrypted data sessions, do not include the NULL-* ciphers in the list.