ERROR: could not insert 'iptable_nat': Exec format error

[Yoppie]

I just got a new dedicated server with proxmox installed.

# pveversion
pve-manager/3.4-3/2fc72fee (running kernel: 2.6.32-37-pve)

But it seems the nat module is not loaded:

# iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o vmbr1 -j MASQUERADE
iptables v1.4.14: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

I tried to load it but I'm getting the following errors:

# modprobe iptable_nat
ERROR: could not insert 'iptable_nat': Exec format error

# insmod /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko
Error: could not insert module /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko: Invalid module format

Do you have any idea what's wrong and how I can fix it?

 

[Richard]

I just got a new dedicated server with proxmox installed.

# pveversion
pve-manager/3.4-3/2fc72fee (running kernel: 2.6.32-37-pve)

# insmod /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko
Error: could not insert module /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko: Invalid module format

Do you have any idea what's wrong and how I can fix it?

Did you make recently a kernel upgrade without reboot afterwards? If so reboot the system!

Check also the file data by

ls -l /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko

should result

-rw-r--r-- 1 root root 15888 Mar 18 08:29 /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko

A system upgrade is useful in any case.

 

[sigxcpu]

There were 2.6.32-37 kernels. Same version, different releases. Had the same issue with spl/zfs dkms build.

Not nice, Proxmox team

 

[Yoppie]

# ls -l /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko
-rw-r--r-- 1 root root 15888 Mar 18 08:29 /lib/modules/2.6.32-37-pve/kernel/net/ipv4/netfilter/iptable_nat.ko

I will try rebooting.

 

[Yoppie]

Rebooting worked. Thanks for pointing me in the right direction.

It's surprising because I hadn't touched the server since it was delivered by my hosting provider but anyway. It works now.