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VPN connections from my MacBook / iOS devices to a Debian server having openswan / xl2tp were working just fine until I used apt-get to upgrade everything due to openssl heartbleed announcement.
Now the VPN connection stopped working with the following in the server auth.log:
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [RFC 3947] method set to=109
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike] method set to=110
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring unknown Vendor ID payload [8f8d83826d246b6fc7a8a6a428c11de8]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring unknown Vendor ID payload [439b59f8ba676c4c7737ae22eab8f582]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring unknown Vendor ID payload [4d1e0e136deafa34c4f3ea9f02ec7285]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring unknown Vendor ID payload [80d0bb3def54565ee84645d4c85ce3ee]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring unknown Vendor ID payload [9909b64eed937c6573de52ace952fa6b]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-03] meth=108, but already using method 110
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02] meth=107, but already using method 110
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] meth=106, but already using method 110
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: ignoring Vendor ID payload [FRAGMENTATION 80000000]
Apr 11 10:32:50 linode pluto[7868]: packet from x.x.x.x:500: received Vendor ID payload [Dead Peer Detection]
Apr 11 10:32:50 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: responding to Main Mode from unknown peer x.x.x.x
Apr 11 10:32:50 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
Apr 11 10:32:50 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: STATE_MAIN_R1: sent MR1, expecting MI2
Apr 11 10:32:50 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: message ignored because it contains an unknown or unexpected payload type (ISAKMP_NEXT_SAK) at the outermost level
Apr 11 10:32:50 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: sending notification INVALID_PAYLOAD_TYPE to x.x.x.x:500
Apr 11 10:32:53 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: message ignored because it contains an unknown or unexpected payload type (ISAKMP_NEXT_SAK) at the outermost level
Apr 11 10:32:53 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: sending notification INVALID_PAYLOAD_TYPE to x.x.x.x:500
Apr 11 10:32:56 linode pluto[7868]: "L2TP-PSK-NAT"[1] x.x.x.x #1: message ignored because it contains an unknown or unexpected payload type (ISAKMP_NEXT_SAK) at the outermost level
and then the connection breaks.
Same type of connection used to generate this in the logs only 10 days ago:
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: responding to Main Mode from unknown peer y.y.y.y
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: STATE_MAIN_R1: sent MR1, expecting MI2
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): peer is NATed
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: STATE_MAIN_R2: sent MR2, expecting MI3
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: ignoring informational payload, type IPSEC_INITIAL_CONTACT msgid=00000000
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: Main mode peer ID is ID_IPV4_ADDR: '192.168.2.101'
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[37] y.y.y.y #43: switched from "L2TP-PSK-NAT" to "L2TP-PSK-NAT"
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[38] y.y.y.y #43: deleting connection "L2TP-PSK-NAT" instance with peer y.y.y.y {isakmp=#0/ipsec=#0}
Apr 1 04:16:04 linode pluto[3093]: "L2TP-PSK-NAT"[38] y.y.y.y #43: transition from state STATE_MAIN_R2 to state STATE_MAIN_R3
etc.
My questions are:
- What's the most apparent meaning of INVALID_PAYLOAD_TYPE error?
- Other than downgrading openswan, what are my best options to investigate and fix this issue?
Dennis Kreminsky
Posted 2014-04-11T11:08:26.747
Reputation: 174
it looks like it can;t negotiate an IKE method (Internetwork Key Exchange), and despite trying multiple methods, still can't agree on one between the two peers. – Frank Thomas – 2014-04-11T12:10:13.417
I assume that IKE's must be configurable, somewhere? – Dennis Kreminsky – 2014-04-11T12:15:01.913
nope, looks like an auto-negotiation fallback mechanism. probably defined by international standards. I'm thinking its because you have a mismatch between the software component capabilities on the peers. make sure both sides of the connection have been upgraded. – Frank Thomas – 2014-04-11T12:18:26.850
client side is mac os x / ios, so not much I can do really, what puzzles me is that it was working just fine, and googling only gives raspberry users that have similar issues and just downgrade to get it fixed. – Dennis Kreminsky – 2014-04-11T12:33:14.850