kernel-3.10.0-229.1.2.el7.x86_64 blocking gre packets

[daveginorge]

Hi All
HP Proliant DL120 G7 - 16GB RAM - 2x SSD HD Raid 1 - Intel 4 port server NIC card - 2 internal onboard NIC's
Centos 7 x64

Saturday I ran yum update. This updated the kernel to kernel-3.10.0-229.1.2.el7.x86_64 from kernel-3.10.0-123.20.1.el7.x86_64.

The first thing that got me worried was the fact that only 1 of my 6 NIC's kept the same position. The MAC addresses were allocated diffetent device names.

Secondly I noticed that my DLINK VPN router (pptp coneection) to a UK address lost connection. After many hours of iptable and Wireshark investigation I rebooted onto the old kernel-3.10.0-123.20.1.el7.x86_64. The NIC's then went back to the original order and the VPN connected.

I have multiple PPTP VPN's to various companies and each of these had stopped working on the new kernel-3.10.0-229.1.2.el7.x86_64.

I have a suspicion that for some reason the kernel is blocking the GRE packets. I was able to connect to the UK VPN using L2TP from the PC, the DLINK router only supports PPTP.

Am I the only person having bad effects with the new kernel-3.10.0-229.1.2.el7.x86_64 I'm hoping not.

Regards Dave