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uname -a
Linux robin-desktop 4.13.0-45-generic #50~16.04.1-Ubuntu SMP Wed May 30 11:18:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

iptables -t raw -I PREROUTING -j NOTRACK
         iptables -t raw -I OUTPUT -j NOTRACK

sudo service netfilter-persistent start

sudo service netfilter-persistent start
Job for netfilter-persistent.service failed because the control process exited with error code. See "systemctl status netfilter-persistent.service" and "journalctl -xe" for details

sudo iptables-restore -t /etc/iptables/rules.v4
iptables-restore: line 2 failed

modprobe -v iptable_raw

 modinfo iptable_raw
filename:       /lib/modules/4.13.0-45-generic/kernel/net/ipv4/netfilter/iptable_raw.ko
license:        GPL
srcversion:     47CC897C719E76996CC9459
depends:        x_tables,ip_tables
intree:         Y
name:           iptable_raw
vermagic:       4.13.0-45-generic SMP mod_unload

lsmod | grep iptable_raw
root@robin-desktop:/home/robin# lsmod | grep ip_tables
ip_tables              24576  3 iptable_mangle,iptable_filter,iptable_nat
x_tables               40960  11 ipt_REJECT,iptable_mangle,ip_tables,ebtables,iptable_filter,xt_tcpudp,ipt_MASQUERADE,xt_CHECKSUM,ip6table_filter,xt_conntrack,ip6_tables

ls /lib/modules/`uname -r`/kernel/net/netfilter/ipset                       nft_limit.ko        xt_ipcomp.ko
ipvs                        nft_log.ko          xt_iprange.ko
nf_conntrack_amanda.ko      nft_masq.ko         xt_ipvs.ko
nf_conntrack_broadcast.ko   nft_meta.ko         xt_l2tp.ko
nf_conntrack_ftp.ko         nft_nat.ko          xt_LED.ko
nf_conntrack_h323.ko        nft_numgen.ko       xt_length.ko
nf_conntrack_irc.ko         nft_objref.ko       xt_limit.ko
nf_conntrack.ko             nft_queue.ko        xt_LOG.ko
nf_conntrack_netbios_ns.ko  nft_quota.ko        xt_mac.ko
nf_conntrack_netlink.ko     nft_redir.ko        xt_mark.ko
nf_conntrack_pptp.ko        nft_reject_inet.ko  xt_multiport.ko
nf_conntrack_proto_gre.ko   nft_reject.ko       xt_nat.ko
nf_conntrack_sane.ko        nft_rt.ko           xt_NETMAP.ko
nf_conntrack_sip.ko         nft_set_bitmap.ko   xt_nfacct.ko
nf_conntrack_snmp.ko        nft_set_hash.ko     xt_NFLOG.ko
nf_conntrack_tftp.ko        nft_set_rbtree.ko   xt_NFQUEUE.ko
nf_dup_netdev.ko            x_tables.ko         xt_osf.ko
nf_log_common.ko            xt_addrtype.ko      xt_owner.ko
nf_log_netdev.ko            xt_AUDIT.ko         xt_physdev.ko
nf_nat_amanda.ko            xt_bpf.ko           xt_pkttype.ko
nf_nat_ftp.ko               xt_cgroup.ko        xt_policy.ko
nf_nat_irc.ko               xt_CHECKSUM.ko      xt_quota.ko
nf_nat.ko                   xt_CLASSIFY.ko      xt_rateest.ko
nf_nat_redirect.ko          xt_cluster.ko       xt_RATEEST.ko
nf_nat_sip.ko               xt_comment.ko       xt_realm.ko
nf_nat_tftp.ko              xt_connbytes.ko     xt_recent.ko
nfnetlink_acct.ko           xt_connlabel.ko     xt_REDIRECT.ko
nfnetlink_cthelper.ko       xt_connlimit.ko     xt_sctp.ko
nfnetlink_cttimeout.ko      xt_connmark.ko      xt_SECMARK.ko
nfnetlink.ko                xt_CONNSECMARK.ko   xt_set.ko
nfnetlink_log.ko            xt_conntrack.ko     xt_socket.ko
nfnetlink_queue.ko          xt_cpu.ko           xt_state.ko
nf_synproxy_core.ko         xt_CT.ko            xt_statistic.ko
nf_tables_inet.ko           xt_dccp.ko          xt_string.ko
nf_tables.ko                xt_devgroup.ko      xt_tcpmss.ko
nf_tables_netdev.ko         xt_dscp.ko          xt_TCPMSS.ko
nft_compat.ko               xt_DSCP.ko          xt_TCPOPTSTRIP.ko
nft_counter.ko              xt_ecn.ko           xt_tcpudp.ko
nft_ct.ko                   xt_esp.ko           xt_TEE.ko
nft_dup_netdev.ko           xt_hashlimit.ko     xt_time.ko
nft_exthdr.ko               xt_helper.ko        xt_TPROXY.ko
nft_fib_inet.ko             xt_hl.ko            xt_TRACE.ko
nft_fib.ko                  xt_HL.ko            xt_u32.ko
nft_fwd_netdev.ko           xt_HMARK.ko
nft_hash.ko                 xt_IDLETIMER.ko

cat /proc/net/ip_tables_matches
conntrack
conntrack
conntrack
udplite
udp
tcp
icmp

modprobe iptable_raw