3225851 - DB6: R3trans fails due to security software

R3trans fails due to following error:

Communication function detecting the error: recv
Protocol specific error code(s): "*", "*", "0"

*** ERROR in prepareStatement[dbdb6.c, 15963] CON = 0 CACHEID = 0 (BEGIN)
&+     DbSlConnectDB6( SQLExtendedPrepare ): [IBM][CLI Driver] SQL30081N  A communication error has been detected. Commun
&+     ication protocol being used: "TCP/IP".  Communication API being used: "SOCKETS".  Location where the error was
&+     detected: "200.100.12.34".  Communication function detecting the error: "recv".  Protocol specific error code(s): 
&+     "*", "*", "0".  SQLSTATE=08001                                                                                       
&+                                                                                                                       
&+     VALUES( CASE CURRENT DEGREE WHEN 'ANY' THEN -1 ELSE CAST( CURRENT DEGREE AS INTEGER ) END )                       
&+       cursor type=NO_HOLD, isolation=UR, cc_release=YES, optlevel=5, degree=1, op_type=32, read_only=0 

SAP application server and database server are on the same host.

SAP on IBM Db2 for Linux, UNIX, and Windows

R3trans, "TCP/IP", "recv", "*", "0",  , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , BC-DB-DB6-DBA , Database Administration , Problem