i have wls cluster that needs to talk to sql server cluster. both are located on separate physical boxes (all are windows2k). the jdbc connections established between both have to be secure. an option is to use something along the lines of type3 jdbc driver (http://www.j-netdirect.com/), however i was wondering about possible type2 or type4 alternatives, as well as some "native" sql server options. another possibility is ipsec, however i doubt it can take advantage of sql server clustering.