Hi to all. I have compiled from source iptables v1.8.2 on debian 9 with a kernel 4.9.144-rt93 64bit also recompiled for enable use of imq as module and other stuff. no error configurig (./configure CFLAGS="-ggdb3 -O0 -DDEBUG" --prefix=/usr --sbindir=/sbin --enable-libipq --enable-bpf-compiler --with-xtlibdir=/lib/xtables) nor during compiling with make, but running when I try to write a rule (for example: iptables -I FORWARD -j port-filter (after iptables -N port-filter) if I type iptables -L I get this error: Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination iptables: symbol lookup error: iptables: undefined symbol: xtables_find_target_revision There are some person that can help me ? Thank in advance, Emilio