Replication Server supports the -X option in isql that sends encrypted passwords through the network when making a client connection
configure replication server set send_enc_password to 'on'
To ensure that all Replication Server client connections, including the first connection to the RSSD, send encrypted passwords, set the configuration parameter RS_send_enc_pw to “on” in the rs_name.cfg file using a text editor.
If RS_send_enc_pw is “on,” all Replication Server connections to the RSSD send encrypted passwords—even if send_enc_password is “off.”