root@NightIsMyBestFriend:~/openvpn-ca/keys# ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
ERROR: problem running ufw-init
modprobe: ERROR: ../libkmod/libkmod.c:514 lookup_builtin_file() could not open builtin file '/lib/modules/2.6.32-openvz-042stab116.2-amd64/modules.builtin.bin'
modprobe: FATAL: Module nf_conntrack_ftp not found in directory /lib/modules/2.6.32-openvz-042stab116.2-amd64
modprobe: ERROR: ../libkmod/libkmod.c:514 lookup_builtin_file() could not open builtin file '/lib/modules/2.6.32-openvz-042stab116.2-amd64/modules.builtin.bin'
modprobe: FATAL: Module nf_nat_ftp not found in directory /lib/modules/2.6.32-openvz-042stab116.2-amd64
modprobe: ERROR: ../libkmod/libkmod.c:514 lookup_builtin_file() could not open builtin file '/lib/modules/2.6.32-openvz-042stab116.2-amd64/modules.builtin.bin'
modprobe: FATAL: Module nf_conntrack_netbios_ns not found in directory /lib/modules/2.6.32-openvz-042stab116.2-amd64
iptables-restore: line 4 failed
iptables-restore: line 4 failed
iptables-restore v1.6.0: iptables-restore: unable to initialize table 'nat'

Error occurred at line: 13
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
iptables-restore: line 35 failed
ip6tables-restore: line 4 failed
ip6tables-restore: line 4 failed
ip6tables-restore: line 138 failed
ip6tables-restore: line 35 failed
sysctl: permission denied on key 'net.ipv4.tcp_sack'

Problem running '/etc/ufw/before.rules'
Problem running '/etc/ufw/user.rules'
Problem running '/etc/ufw/before6.rules'
Problem running '/etc/ufw/user6.rules'