When testing using Kerberos authentication why does authentication occur on every request instead of just once.
This is a known issue in Silk Performer 7.2 which can be fixed by applying Patch 11 (SP72_Patch_11_Kerberos). This patch fixes Kerberos authentication, where too many domain controller round trips have been done. Now only one roundtrip per domain/user combination is performed.
A call to the WebSetUserAuthNtlm function, to set the user name and password, clears the internal credential memory, so that subsequent Kerberos authentications of the same user force a new round trip to the domain controller (this enables the simulation of a system start). Consequently, if you want to avoid the domain controller round trips, place the WebSetUserAuthNtlm function call into the Init transaction.
To request this patch please contact Support and quote this resolution ID.