Use this parameter to specify that SNC should be used for internal RFC communications initiated by the AS ABAP.
This parameter specifies whether RFCs to internal destinations within the same SAP system should be protected with SNC.
Due to possible effects on performance, you should carefully consider the necessity of securing RFCs to internal destinations with SNC. You can achieve a comparable level of security for internal destinations with an adequate network infrastructure (see Recommendations).
0 (internal RFC connections are not SNC-protected)
snc/enable (activate SNC)
snc/accept_insecure_rfc (accept unprotected RFCs)
snc/accept_insecure_r3int_rfc (accept unprotected internal RFCs)
0 : Internal RFCs are unprotected
1 : Internal RFCs are protected with SNC