There are several requirements and restrictions for network-based security.
A network-based security mechanism installed on all machines for which network security is to be enabled. The security mechanism must be supported by SAP Replication Server.
SAP Replication Server version 11.5 or later for all client and destination SAP Replication Servers.
SAP ASE version 12 or later and/or compatible heterogeneous data servers for all client and destination data servers.Compatible heterogeneous data servers must support the security mechanism installed on SAP Replication Server and the set proxy concept. See the Heterogeneous Replication Guide.
Both ends of a secured pathway (client and server) must support the same security mechanism, and the security parameters must have the same feature settings.
User names must be unique throughout the replication system.
If your replication system supports multiple security systems, and you cannot guarantee unique user names, you may need to turn off request stored procedures to avoid a potential security breach.