XCOM loopback "SSL23_GET_CLIENT_HELLO:unknown protocol"
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XCOM loopback "SSL23_GET_CLIENT_HELLO:unknown protocol"


Article ID: 247355


Updated On:


XCOM Data Transport XCOM Data Transport - Linux PC XCOM Data Transport - Windows XCOM Data Transport - z/OS


Attempting to configure SSL for XCOM r11.6 SP01 on AIX and encountering the following error from a loopback test.
Default configssl.cnf file is being used i.e. SSL_METHOD parameter values are set to all.
XCOMU0780E Txpi  308: TxpiInitSSL Failed msg = <error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol> value = 4294967295:
#XCOMU0297E Error requesting header confirmation: Txpi  227: Socket received 0 bytes: partner closed socket. Last error: 0


Release : 11.6

Component : XCOM Data Transport for AIX


The loopback configuration file contained the parameter "PORT=8045" to connect to the correct SSL port but did not have parameter "SECURE_SOCKET=YES" set.
The parameter SECURE_SOCKET defaults to NO and is required to be set to YES when using an SSL port/socket.

Additional Information

When inadvertently using the incorrect combination of unsecure port "PORT=8044" with "SECURE_SOCKET=YES" similar errors will be encountered but for SSL23_GET_SERVER_HELLO i.e.

XCOMU0780E Txpi  308: TxpiInitSSL Failed msg = <error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol> value = 4294967295:
#XCOMU0298E Unable to allocate remote transaction program: Txpi  215: Socket send error return value = 9