conntrack: generic helper won't handle protocol 47. Please consider loading the specific helper modu

[ehabh]

I have gre tunnels working in a vm on proxmox 3.4 but now I am trying proxmox 4.4 and when i try to create a tunnel in a kvm vm just like in 3.4 the tunnel is created ie the interfaces but does not pass any traffix I also get this error in dmesg in the vm

conntrack: generic helper won't handle protocol 47. Please consider loading the specific helper module
protocol 47 is gre, the gre modules are loaded both on the proxmox server and in the vm.

 

[dietmar]

IMHO this is VM specific, because you run your own kernel inside the VM. I doubt that this is related to the proxmox update.

 

[ehabh]

I do not think this is vm specific because I tried it also with clean installs of centos 6 AND centos 7 both in kvm. The only thing different is that this server has a routed network config.

 

[karnz]

Today I got this error too, and all my VM are LXC. Not sure how to load specific helper module?

proxmox-ve: 5.2-2 (running kernel: 4.15.18-7-pve)
pve-manager: 5.2-10 (running version: 5.2-10/6f892b40)
pve-kernel-4.15: 5.2-10
pve-kernel-4.15.18-7-pve: 4.15.18-27
pve-kernel-4.15.18-5-pve: 4.15.18-24
pve-kernel-4.15.18-4-pve: 4.15.18-23
pve-kernel-4.15.18-1-pve: 4.15.18-19
pve-kernel-4.15.17-3-pve: 4.15.17-14
pve-kernel-4.15.17-2-pve: 4.15.17-10
pve-kernel-4.15.17-1-pve: 4.15.17-9
pve-kernel-4.13.13-2-pve: 4.13.13-33
ceph: 12.2.8-pve1
corosync: 2.4.2-pve5
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: 1.2-2
libjs-extjs: 6.0.1-2
libpve-access-control: 5.0-8
libpve-apiclient-perl: 2.0-5
libpve-common-perl: 5.0-41
libpve-guest-common-perl: 2.0-18
libpve-http-server-perl: 2.0-11
libpve-storage-perl: 5.0-30
libqb0: 1.0.1-1
lvm2: 2.02.168-pve6
lxc-pve: 3.0.2+pve1-3
lxcfs: 3.0.2-2
novnc-pve: 1.0.0-2
proxmox-widget-toolkit: 1.0-20
pve-cluster: 5.0-30
pve-container: 2.0-29
pve-docs: 5.2-9
pve-firewall: 3.0-14
pve-firmware: 2.0-5
pve-ha-manager: 2.0-5
pve-i18n: 1.0-6
pve-libspice-server1: 0.14.1-1
pve-qemu-kvm: 2.12.1-1
pve-xtermjs: 1.0-5
qemu-server: 5.0-38
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3
zfsutils-linux: 0.7.11-pve1~bpo1