Hi Eric, Thank you very much. I went through the link process, but when I execute the program: ./test The following occurs: passer: Failed to send netlink message: Connection refused Could you point out for me how I can solve it again? Cheers! Regards, Ji Le lun 01/12/2003 à 02:47, Jee J.Z. a écrit : > Hi all, > > I am new to netfilter and even linux. I just wish to try the example code in the man page of libipq (I saved it as test.c and have compiled it to test.o). But when I make it: #cc test.o -o test, the following errors showed up: > > [root@kite1 netfilter]# cc test.o -o test you need to link with the libipq library : cc test.o -o test -lipq -- Eric Leblond Nufw, Now User Filtering Works (http://www.nufw.org)