PRE-TEST

moon# echo 1 > /proc/sys/net/ipv4/ip_forward

sun# echo 1 > /proc/sys/net/ipv4/ip_forward

moon# ipsec start
Starting strongSwan 4.3.6 IPsec [starter]...

sun# ipsec start
Starting strongSwan 4.3.6 IPsec [starter]...

moon# sleep 2

moon# ipsec up net-net
002 "net-net" #1: initiating Main Mode
104 "net-net" #1: STATE_MAIN_I1: initiate
003 "net-net" #1: ignoring Vendor ID payload [strongSwan]
003 "net-net" #1: received Vendor ID payload [XAUTH]
003 "net-net" #1: received Vendor ID payload [Dead Peer Detection]
106 "net-net" #1: STATE_MAIN_I2: sent MI2, expecting MR2
108 "net-net" #1: STATE_MAIN_I3: sent MI3, expecting MR3
003 "net-net" #1: next payload type of ISAKMP Hash Payload has an unknown value: 41
003 "net-net" #1: malformed payload in packet
010 "net-net" #1: STATE_MAIN_I3: retransmission; will wait 20s for response
003 "net-net" #1: next payload type of ISAKMP Hash Payload has an unknown value: 207
003 "net-net" #1: malformed payload in packet
003 "net-net" #1: discarding duplicate packet; already STATE_MAIN_I3
003 "net-net" #1: discarding duplicate packet; already STATE_MAIN_I3
010 "net-net" #1: STATE_MAIN_I3: retransmission; will wait 40s for response
003 "net-net" #1: next payload type of ISAKMP Hash Payload has an unknown value: 56
003 "net-net" #1: malformed payload in packet
031 "net-net" #1: max number of retransmissions (2) reached STATE_MAIN_I3.  Possible authentication failure: no acceptable response to our first encrypted message


TEST

moon# cat /var/log/auth.log | grep 'malformed payload in packet' [YES]
Feb 27 23:31:03 moon pluto[21937]: "net-net" #1: malformed payload in packet
Feb 27 23:31:12 moon pluto[21937]: "net-net" #1: malformed payload in packet
Feb 27 23:31:32 moon pluto[21937]: "net-net" #1: malformed payload in packet

sun# cat /var/log/auth.log | grep 'probable authentication failure.*mismatch of preshared secrets.*malformed payload in packet' [YES]
Feb 27 23:31:02 sun pluto[8458]: "net-net" #1: probable authentication failure (mismatch of preshared secrets?): malformed payload in packet
Feb 27 23:31:12 sun pluto[8458]: "net-net" #1: probable authentication failure (mismatch of preshared secrets?): malformed payload in packet
Feb 27 23:31:32 sun pluto[8458]: "net-net" #1: probable authentication failure (mismatch of preshared secrets?): malformed payload in packet

sun# cat /var/log/auth.log | grep 'sending encrypted notification PAYLOAD_MALFORMED' [YES]
Feb 27 23:31:02 sun pluto[8458]: "net-net" #1: sending encrypted notification PAYLOAD_MALFORMED to 192.168.0.1:500
Feb 27 23:31:12 sun pluto[8458]: "net-net" #1: sending encrypted notification PAYLOAD_MALFORMED to 192.168.0.1:500
Feb 27 23:31:32 sun pluto[8458]: "net-net" #1: sending encrypted notification PAYLOAD_MALFORMED to 192.168.0.1:500

moon# ipsec status | grep 'net-net.*STATE_MAIN_I4.*ISAKMP SA established' [NO]

sun# ipsec status | grep 'net-net.*STATE_MAIN_R3.*ISAKMP SA established' [NO]


POST-TEST

moon# ipsec stop
Stopping strongSwan IPsec...

sun# ipsec stop
Stopping strongSwan IPsec...