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 IPsec 2.8.11 [starter]...

sun# ipsec start
Starting strongSwan IPsec 2.8.11 [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 2.8.11]
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: 182
003 "net-net" #1: malformed payload in packet
003 "net-net" #1: discarding duplicate packet; already STATE_MAIN_I3
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: 128
003 "net-net" #1: malformed payload in packet
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: 150
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]
Jul 20 07:26:40 moon pluto[12018]: "net-net" #1: malformed payload in packet
Jul 20 07:26:50 moon pluto[12018]: "net-net" #1: malformed payload in packet
Jul 20 07:27:11 moon pluto[12018]: "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]
Jul 20 07:26:40 sun pluto[6211]: "net-net" #1: probable authentication failure (mismatch of preshared secrets?): malformed payload in packet
Jul 20 07:26:50 sun pluto[6211]: "net-net" #1: probable authentication failure (mismatch of preshared secrets?): malformed payload in packet
Jul 20 07:27:10 sun pluto[6211]: "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]
Jul 20 07:26:40 sun pluto[6211]: "net-net" #1: sending encrypted notification PAYLOAD_MALFORMED to 192.168.0.1:500
Jul 20 07:26:50 sun pluto[6211]: "net-net" #1: sending encrypted notification PAYLOAD_MALFORMED to 192.168.0.1:500
Jul 20 07:27:10 sun pluto[6211]: "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...