Again,
perl /usr/local/csf/bin/csftest.pl
Testing ip_tables/iptable_filter...OK
Testing ipt_LOG...OK
Testing ipt_multiport/xt_multiport...FAILED [FATAL Error: FATAL: Could not load /lib/modules/4.2.3-2-pve/modules.dep: No such file or directory] - Required for csf to function
Testing ipt_REJECT...OK
Testing ipt_state/xt_state...OK
Testing ipt_limit/xt_limit...OK
Testing ipt_recent...OK
Testing xt_connlimit...FAILED [Error: iptables: Protocol wrong type for socket.] - Required for CONNLIMIT feature
Testing ipt_owner/xt_owner...FAILED [Error: FATAL: Could not load /lib/modules/4.2.3-2-pve/modules.dep: No such file or directory] - Required for SMTP_BLOCK and UID/GID blocking features
Testing iptable_nat/ipt_REDIRECT...OK
Testing iptable_nat/ipt_DNAT...OK
RESULT: csf will not function on this server due to FATAL errors from missing modules [1]
Also, lsmod on host says:
lsmod
Module Size Used by
xt_nat 16384 0
xt_REDIRECT 16384 0
nf_nat_redirect 16384 1 xt_REDIRECT
xt_recent 20480 0
xt_limit 16384 0
nf_log_ipv4 16384 2
nf_log_common 16384 1 nf_log_ipv4
xt_LOG 16384 2
xt_owner 16384 1
xt_connlimit 16384 0
iptable_nat 16384 0
nf_nat_ipv4 16384 1 iptable_nat
nf_nat 24576 3 nf_nat_redirect,nf_nat_ipv4,xt_nat
xt_state 16384 50
veth 16384 0
ip6t_REJECT 16384 1
nf_reject_ipv6 16384 1 ip6t_REJECT
nf_conntrack_ipv6 20480 33
nf_defrag_ipv6 36864 1 nf_conntrack_ipv6
ip6table_filter 16384 2
ip6_tables 28672 1 ip6table_filter
xt_mac 16384 6
ipt_REJECT 16384 4
nf_reject_ipv4 16384 1 ipt_REJECT
xt_physdev 16384 16
nf_conntrack_ipv4 20480 36
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
xt_comment 16384 50
xt_tcpudp 16384 235
xt_set 16384 8
xt_addrtype 16384 7
xt_multiport 16384 9
xt_conntrack 16384 18
xt_mark 16384 28
ip_set_hash_net 36864 2
ip_set 45056 2 ip_set_hash_net,xt_set
iptable_filter 16384 3
ip_tables 28672 2 iptable_filter,iptable_nat
x_tables 36864 23 xt_physdev,ip6table_filter,xt_mark,xt_comment,xt_recent,ip_tables,xt_tcpudp,xt_limit,xt_owner,xt_state,xt_connlimit,xt_conntrack,xt_LOG,xt_mac,xt_nat,xt_set,xt_multiport,iptable_filter,ipt_REJECT,xt_REDIRECT,ip6_tables,xt_addrtype,ip6t_REJECT
nfsd 319488 2
auth_rpcgss 61440 1 nfsd
nfs_acl 16384 1 nfsd
nfs 258048 0
lockd 94208 2 nfs,nfsd
grace 16384 2 nfsd,lockd
fscache 65536 1 nfs
sunrpc 331776 6 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
ib_iser 53248 0
rdma_cm 45056 1 ib_iser
iw_cm 45056 1 rdma_cm
ib_cm 45056 1 rdma_cm
ib_sa 32768 2 rdma_cm,ib_cm
ib_mad 49152 2 ib_cm,ib_sa
ib_core 102400 6 rdma_cm,ib_cm,ib_sa,iw_cm,ib_mad,ib_iser
ib_addr 20480 2 rdma_cm,ib_core
iscsi_tcp 20480 0
libiscsi_tcp 24576 1 iscsi_tcp
libiscsi 57344 3 libiscsi_tcp,iscsi_tcp,ib_iser
scsi_transport_iscsi 98304 4 iscsi_tcp,ib_iser,libiscsi
nfnetlink_log 20480 1
nfnetlink 16384 3 nfnetlink_log,ip_set
intel_rapl 20480 0
iosf_mbi 16384 1 intel_rapl
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
coretemp 16384 0
kvm_intel 167936 0
kvm 512000 1 kvm_intel
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
snd_pcm 102400 0
ghash_clmulni_intel 16384 0
aesni_intel 167936 0
snd_timer 32768 1 snd_pcm
aes_x86_64 20480 1 aesni_intel
lrw 16384 1 aesni_intel
i915 1138688 1
snd 86016 2 snd_timer,snd_pcm
gf128mul 16384 1 lrw
mei_me 36864 0
iTCO_wdt 16384 1
mxm_wmi 16384 0
iTCO_vendor_support 16384 1 iTCO_wdt
glue_helper 16384 1 aesni_intel
i2c_i801 24576 0
ppdev 20480 0
drm_kms_helper 126976 1 i915
ablk_helper 16384 1 aesni_intel
drm 356352 3 i915,drm_kms_helper
8250_fintek 16384 0
ie31200_edac 16384 0
i2c_algo_bit 16384 1 i915
input_leds 16384 0
serio_raw 16384 0
cryptd 20480 3 ghash_clmulni_intel,aesni_intel,ablk_helper
soundcore 16384 1 snd
pcspkr 16384 0
mei 102400 1 mei_me
lpc_ich 24576 0
shpchp 36864 0
parport_pc 32768 0
mac_hid 16384 0
parport 49152 2 ppdev,parport_pc
edac_core 53248 1 ie31200_edac
wmi 20480 1 mxm_wmi
video 36864 1 i915
tpm_infineon 20480 0
vhost_net 20480 0
vhost 36864 1 vhost_net
macvtap 20480 1 vhost_net
macvlan 24576 1 macvtap
nf_conntrack_ftp 20480 0
nf_conntrack 106496 8 nf_nat,xt_state,xt_connlimit,nf_nat_ipv4,xt_conntrack,nf_conntrack_ftp,nf_conntrack_ipv4,nf_conntrack_ipv6
autofs4 40960 2
raid1 36864 2
ahci 36864 4
libahci 32768 1 ahci
r8169 81920 0
mii 16384 1 r8169