hi I m one among the member of this list ,i have a problem with libiptc...please look after if u can do it. I want to insert one rule using the iptc_insert_entry function in libiptc.... As i m new to netfilter ,libiptc ..i m struggling a lot..i hope u can help me . Just give me an information about how to fill the target information in the ip_entry structure ...and the i target_offset field ... I want insert a rule like.. -t nat -A PREROUTING -s 192.45.23..1 -p icmp -j DROP please help me on how to fill the structure and invoke the function. I m eagerly expecting your reply... thanking you vijay