Hi, I used default Redhat 8.0 and use following call getsockopt (s,SOL_TCP,TCP_INFO, &info, ..) from http://www.blu.org/pipermail/discuss/2001-June/020145.html. And got error "protocol not supported". What do I need to do? Do I need to recompile kernel with some special settings? TIA Leigh - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html