hi I trying to configure iptables with kernel but because of some problem i am not able to do so. Some information that i want to give are:- Operating system - Cent OS4 #My operating system on which i am trying to do Current kernel version- 2.6.9-11.EL #Result after running "uname -r" command Current iptables version - iptables v1.3.2 #Result after running "iptables -V" command ----------------------------------------------------------------------------------------- I have used the following command --------------------------------------------------------------------------------------------------------------------------------------------- cd /usr/src/kernels ls 2.6.9-11.EL-hugemem-i686 2.6.9-11.EL-smp-i686 2.6.9-11.EL-i686 2.6.9-5.0.3.EL-i686 cd .. wget http://iptables.org/downloads.html#iptables-1.3.2 bzip2 -cd iptables-1.3.2.tar.bz2 | tar xvf - cd iptables-1.3.2/ make KERNEL_DIR=/usr/src/kernels/2.6.9-11.EL-i686/ # Problem occured after running this command Extensions found: IPv4:recent cc -O2 -Wall -Wunused -I/usr/src/kernels/2.6.9-11.EL-i686//include -Iinclude/ -DIPTABLES_VERSION=\"1.3.2\" -fPIC -o extensions/libipt_ah_sh.o -c extensions/libipt_ah.c In file included from /usr/src/kernels/2.6.9-11.EL-i686//include/linux/netfilter_ipv4.h:8, from /usr/src/kernels/2.6.9-11.EL-i686//include/linux/netfilter_ipv4/ip_tables.h:26, from include/libiptc/libiptc.h:6, from include/iptables.h:5, from extensions/libipt_ah.c:8: /usr/src/kernels/2.6.9-11.EL-i686//include/linux/config.h:6:2: #error including kernel header in userspace; use the glibc headers instead! make: *** [extensions/libipt_ah_sh.o] Error 1 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- With regards Vikrant