Hi,
I'm using strongSwan 5.6.3 on Openwrt for x86 architecture. Here i'm
trying to achieve the hub-n-spoke setup [a network diagram has been
attached] for connecting/routing multiple subnets behind more than two
gateways.
I've tried numerous changes in ipsec.conf as suggested, but I'm stuck
with 'received TS_UNACCEPTABLE notify, no CHILD_SA built' on the spoke
side, Although both of the security associations are up.
Need a remedy Badly.
My configurations are as followings-
Hub
--
config setup
strictcrlpolicy=no
conn %default
ikelifetime=30m
keylife=10m
rekeymargin=3m
keyingtries=1
mobike=yes
conn spokeconn2
left=3.3.3.3
leftsubnet=0.0.0.0/0
right=20.20.20.20
rightsubnet=192.168.20.0/24
ike=aes256-sha1-modp2048!
esp=aes256-sha1-modp2048!
authby=secret
type=tunnel
keyexchange=ikev2
auto=route
conn spokeconn1
left=3.3.3.3
leftsubnet=0.0.0.0/0
right=10.10.10.10
rightsubnet=192.168.10.0/24
ike=aes256-sha1-modp2048!
esp=aes256-sha1-modp2048!
authby=secret
type=tunnel
keyexchange=ikev2
auto=route
Spoke1
--
config setup
strictcrlpolicy=no
conn %default
ikelifetime=30m
keylife=10m
rekeymargin=3m
keyingtries=1
mobike=yes
conn allmainconn
left=10.10.10.10
leftsubnet=192.168.10.0/24
right=3.3.3.3
rightsubnet=192.168.100.0/24,192.168.20.0/24
ike=aes256-sha1-modp2048!
esp=aes256-sha1-modp2048!
authby=secret
type=tunnel
keyexchange=ikev2
auto=route
Spoke2
---
config setup
strictcrlpolicy=no
charondebug="all"
conn %default
ikelifetime=30m
keylife=10m
rekeymargin=3m
keyingtries=1
mobike=yes
conn allmainconn
left=20.20.20.20
leftsubnet=192.168.20.0/24
right=3.3.3.3
rightsubnet=192.168.100.0/24,192.168.10.0/24
ike=aes256-sha1-modp2048!
esp=aes256-sha1-modp2048!
authby=secret
type=tunnel
keyexchange=ikev2
auto=route
For Authentication I'm using PSK key.
Error Logs Recieved:
Hub-
initiating IKE_SA spokeconn2[4] to 20.20.20.20
generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP)
N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
sending packet: from 3.3.3.3[500] to 20.20.20.20[500] (464 bytes)
received packet: from 20.20.20.20[500] to 3.3.3.3[500] (464 bytes)
parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP)
N(FRAG_SUP) N(HASH_ALG) N(MULT_AUTH) ]
remote host is behind NAT
authentication of '3.3.3.3' (myself) with pre-shared key
establishing CHILD_SA spokeconn2{6}
generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH SA TSi TSr
N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_4_ADDR) N(ADD_4_ADDR) N(MULT_AUTH)
N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
sending packet: from 3.3.3.3[4500] to 20.20.20.20[4500] (284 bytes)
received packet: from 20.20.20.20[4500] to 3.3.3.3[4500] (268 bytes)
parsed IKE_AUTH response 1 [ IDr AUTH SA TSi TSr N(AUTH_LFT)
N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_4_ADDR) ]
authentication of '20.20.20.20' with pre-shared key successful
IKE_SA spokeconn2[4] established between
3.3.3.3[3.3.3.3]...20.20.20.20[20.20.20.20]
scheduling reauthentication in 1505s
maximum IKE_SA lifetime 1685s
error installing route with policy 192.168.10.0/24 === 192.168.20.0/24 out
unable to install IPsec policies (SPD) in kernel
failed to establish CHILD_SA, keeping IKE_SA
received AUTH_LIFETIME of 1514s, scheduling reauthentication in 1334s
peer supports MOBIKE
sending DELETE for ESP CHILD_SA with SPI 85f68599
generating INFORMATIONAL request 2 [ D ]
sending packet: from 3.3.3.3[4500] to 20.20.20.20[4500] (76 bytes)
received packet: from 20.20.20.20[4500] to 3.3.3.3[4500] (76 bytes)
parsed INFORMATIONAL response 2 [ D ]
establishing connection 'spokeconn2' failed
Spoke1-
initiating IKE_SA allmainconn[1] to 3.3.3.3
generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP)
N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
sending packet: from 10.10.10.10[500] to 3.3.3.3[500] (464 bytes)
received packet: from 3.3.3.3[500] to 10.10.10.10[500] (464 bytes)
parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP)
N(FRAG_SUP) N(HASH_ALG) N(MULT_AUTH) ]
remote host is behind NAT
authentication of '10.10.10.10' (myself) with pre-shared key
establishing CHILD_SA allmainconn{2}
generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH SA TSi TSr
N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_4_ADDR) N(MULT_AUTH) N(EAP_ONLY)
N(MSG_ID_SYN_SUP) ]
sending packet: from 10.10.10.10[4500] to 3.3.3.3[4500] (300 bytes)
received packet: from 3.3.3.3[4500] to 10.10.10.10[4500] (172 bytes)
parsed IKE_AUTH response 1 [ IDr AUTH N(AUTH_LFT) N(MOBIKE_SUP)
N(ADD_4_ADDR) N(ADD_4_ADDR) N(ADD_4_ADDR) N(TS_UNACCEPT) ]
authentication of '3.3.3.3' with pre-shared key successful
IKE_SA allmainconn[1] established between
10.10.10.10[10.10.10.10]...3.3.3.3[3.3.3.3]
scheduling reauthentication in 1524s
maximum IKE_SA lifetime
