Hi, on FC3 I have tried to install a nat-t patch for kernel 2.6.9-1 but I have an error, in particular: have put the file 'openswan-2.4.0.kernel-2.6-natt.patch' in: /usr/src/redhat/SOURCES ..where are already other file .patch. Then I have modified the '/usr/src/redhat/SPECS/kernel-2.6.spec' and I have inserted: Patch2020: openswan-2.4.0.kernel-2.6-natt.patch .. .. %patch2020 -p1 ..then I execute: #rpmbuild -bp --target=i686 kernel.spec ..but I have the following error: CONFIG_IPSEC_NAT_TRAVERSAL make[1]: *** [nonint_oldconfig] Error 1 make: *** [nonint_oldconfig] Error 2 error: Bad exit status from /var/tmp/rpm-tmp.56626 (%prep) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.56626 (%prep) why ?? where is the my mistake ?? still thanks. Salvatore.