[Openswan Users] host to host ipsec vpn tunnel through NAT
Michael Chan
mchan49 at gmail.com
Wed Oct 9 18:29:06 UTC 2013
Hi,
I'm trying to setup a vpn connection from my client to server through a
NAT router, but I'm not getting the connection up. My topology looks like
this:
Client(10.10.0.10)------------(10.10.0.2)NAT(20.20.20.2)-----------(20.20.20.150)Server
NAT IP: 20.20.20.100.
So when I connect from the client to server through the NAT router, my
address will get translated using 20.20.20.100 when it reached the server.
This is what I see from ipsec status command from client and server. Is
there an example of this scenario on how the config should look like for
ipsec.conf?
Client log:
client1(etc)#ipsec status
000 using kernel interface: netkey
000 interface eth0/eth0 2001::a
000 interface lo/lo ::1
000 interface lo/lo 127.0.0.1
000 interface lo/lo 127.0.0.1
000 interface eth0/eth0 10.10.0.10
000 interface eth0/eth0 10.10.0.10
000 interface eth1/eth1 192.168.208.245
000 interface eth1/eth1 192.168.208.245
000
000 FIPS=disabled
000 SElinux=indeterminate
000
000 config setup options:
000
000 configdir=/etc, configfile=/etc/ipsec.conf, secrets=/etc/ipsec.secrets,
ipsecdir=/etc/ipsec.d, dumpdir=/var/run/pluto/
000 sbindir=/usr/sbin, libdir=/usr/libexec/ipsec,
libexecdir=/usr/libexec/ipsec
000 nhelpers=-1, uniqueids=yes, retransmits=yes, force_busy=no
000 ikeport=500, strictcrlpolicy=no, crlcheckinterval=0, listen=<any>
000 secctx_attr_value=0
000 %myid = (none)
000 debug none
000
000 nat_traversal=yes, keep_alive=20, nat_ikeport=4500,
disable_port_floating=no
000 virtual_private (%priv):
000 - allowed 1 subnet: 20.20.0.0/16
000 - disallowed 1 subnet: 10.0.0.0/8
000
000 ESP algorithms supported:
000
000 algorithm ESP encrypt: id=2, name=ESP_DES, ivlen=8, keysizemin=64,
keysizemax=64
000 algorithm ESP encrypt: id=3, name=ESP_3DES, ivlen=8, keysizemin=192,
keysizemax=192
000 algorithm ESP encrypt: id=6, name=ESP_CAST, ivlen=8, keysizemin=40,
keysizemax=128
000 algorithm ESP encrypt: id=7, name=ESP_BLOWFISH, ivlen=8, keysizemin=40,
keysizemax=448
000 algorithm ESP encrypt: id=11, name=ESP_NULL, ivlen=0, keysizemin=0,
keysizemax=0
000 algorithm ESP encrypt: id=12, name=ESP_AES, ivlen=8, keysizemin=128,
keysizemax=256
000 algorithm ESP encrypt: id=13, name=ESP_AES_CTR, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=14, name=ESP_AES_CCM_A, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=15, name=ESP_AES_CCM_B, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=16, name=ESP_AES_CCM_C, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=18, name=ESP_AES_GCM_A, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=19, name=ESP_AES_GCM_B, ivlen=12,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=20, name=ESP_AES_GCM_C, ivlen=16,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=22, name=ESP_CAMELLIA, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=252, name=ESP_SERPENT, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=253, name=ESP_TWOFISH, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP auth attr: id=1, name=AUTH_ALGORITHM_HMAC_MD5,
keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=2, name=AUTH_ALGORITHM_HMAC_SHA1,
keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=5, name=AUTH_ALGORITHM_HMAC_SHA2_256,
keysizemin=256, keysizemax=256
000 algorithm ESP auth attr: id=6, name=AUTH_ALGORITHM_HMAC_SHA2_384,
keysizemin=384, keysizemax=384
000 algorithm ESP auth attr: id=7, name=AUTH_ALGORITHM_HMAC_SHA2_512,
keysizemin=512, keysizemax=512
000 algorithm ESP auth attr: id=8, name=AUTH_ALGORITHM_HMAC_RIPEMD,
keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=9, name=AUTH_ALGORITHM_AES_CBC,
keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=251, name=AUTH_ALGORITHM_NULL_KAME,
keysizemin=0, keysizemax=0
000
000 IKE algorithms supported:
000
000 algorithm IKE encrypt: id=0, name=(null), blocksize=16, keydeflen=131
000 algorithm IKE encrypt: id=5, name=OAKLEY_3DES_CBC, blocksize=8,
keydeflen=192
000 algorithm IKE encrypt: id=7, name=OAKLEY_AES_CBC, blocksize=16,
keydeflen=128
000 algorithm IKE hash: id=1, name=OAKLEY_MD5, hashsize=16
000 algorithm IKE hash: id=2, name=OAKLEY_SHA1, hashsize=20
000 algorithm IKE hash: id=4, name=OAKLEY_SHA2_256, hashsize=32
000 algorithm IKE hash: id=5, name=OAKLEY_SHA2_384, hashsize=48
000 algorithm IKE hash: id=6, name=OAKLEY_SHA2_512, hashsize=64
000 algorithm IKE dh group: id=2, name=OAKLEY_GROUP_MODP1024, bits=1024
000 algorithm IKE dh group: id=5, name=OAKLEY_GROUP_MODP1536, bits=1536
000 algorithm IKE dh group: id=14, name=OAKLEY_GROUP_MODP2048, bits=2048
000 algorithm IKE dh group: id=15, name=OAKLEY_GROUP_MODP3072, bits=3072
000 algorithm IKE dh group: id=16, name=OAKLEY_GROUP_MODP4096, bits=4096
000 algorithm IKE dh group: id=17, name=OAKLEY_GROUP_MODP6144, bits=6144
000 algorithm IKE dh group: id=18, name=OAKLEY_GROUP_MODP8192, bits=8192
000 algorithm IKE dh group: id=22, name=OAKLEY_GROUP_DH22, bits=1024
000 algorithm IKE dh group: id=23, name=OAKLEY_GROUP_DH23, bits=2048
000 algorithm IKE dh group: id=24, name=OAKLEY_GROUP_DH24, bits=2048
000
000 stats db_ops: {curr_cnt, total_cnt, maxsz} :context={0,1,64}
trans={0,1,3072} attrs={0,1,2048}
000
000 Connection list:
000
000 "sample-connection-for-illustration": 10.0.0.0/8===10.10.0.10
<10.10.0.10>...20.20.20.150<20.20.20.150>===20.20.0.0/16; unrouted; eroute
owner: #0
000 "sample-connection-for-illustration": oriented; my_ip=unset;
their_ip=unset;
000 "sample-connection-for-illustration": xauth info: us:none, them:none,
my_xauthuser=[any]; their_xauthuser=[any]; ;
000 "sample-connection-for-illustration": modecfg info: us:none,
them:none, modecfg policy:push, dns1:unset, dns2:unset;
000 "sample-connection-for-illustration": labeled_ipsec:no, loopback:no;
000 "sample-connection-for-illustration": policy_label:unset;
000 "sample-connection-for-illustration": ike_life: 3600s; ipsec_life:
28800s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 0;
sha2_truncbug:no; initial_contact:no;
000 "sample-connection-for-illustration": policy:
PSK+ENCRYPT+PFS+UP+IKEv2ALLOW+SAREFTRACK+IKE_FRAG;
000 "sample-connection-for-illustration": prio: 8,16; interface: eth0;
metric: 0, mtu: unset;
000 "sample-connection-for-illustration": newest ISAKMP SA: #3; newest
IPsec SA: #0;
000 "sample-connection-for-illustration": IKE algorithms wanted:
AES_CBC(7)_256-SHA1(2)_000-MODP2048(14)
000 "sample-connection-for-illustration": IKE algorithms found:
AES_CBC(7)_256-SHA1(2)_160-MODP2048(14)
000 "sample-connection-for-illustration": IKE algorithm newest:
AES_CBC_256-SHA1-MODP2048
000 "sample-connection-for-illustration": ESP algorithms wanted:
AES(12)_256-SHA1(2)_000; pfsgroup=MODP2048(14)
000 "sample-connection-for-illustration": ESP algorithms loaded:
AES(12)_256-SHA1(2)_160
000
000 Total IPsec connections: loaded 1, active 0
000
000 State list:
000
000 #3: "sample-connection-for-illustration":500 STATE_MAIN_R3 (sent MR3,
ISAKMP SA established); EVENT_SA_REPLACE in 2905s; newest ISAKMP;
lastdpd=-1s(seq in:0 out:0); idle; import:not set
000 #1: "sample-connection-for-illustration":500 STATE_MAIN_I1 (sent MI1,
expecting MR1); EVENT_RETRANSMIT in 26s; nodpd; idle; import:admin initiate
000 #1: pending Phase 2 for "sample-connection-for-illustration" replacing
#0
000
000 Shunt list:
000
Server log:
server1(etc)#ipsec status
000 using kernel interface: netkey
000 interface lo/lo ::1
000 interface lo/lo 127.0.0.1
000 interface eth0/eth0 20.20.20.150
000 interface eth1/eth1 192.168.208.246
000
000 FIPS=disabled
000 SElinux=disabled
000
000 config setup options:
000
000 configdir=/etc, configfile=/etc/ipsec.conf, secrets=/etc/ipsec.secrets,
ipsecdir=/etc/ipsec.d, dumpdir=/var/run/pluto/
000 sbindir=/usr/sbin, libdir=/usr/libexec/ipsec,
libexecdir=/usr/libexec/ipsec
000 nhelpers=-1, uniqueids=yes, retransmits=yes, force_busy=no
000 ikeport=500, strictcrlpolicy=no, crlcheckinterval=0, listen=<any>
000 secctx_attr_value=0
000 %myid = (none)
000 debug none
000
000 nat_traversal=no, keep_alive=20, nat_ikeport=4500,
disable_port_floating=yes
000 virtual_private (%priv):
000 - allowed 0 subnets:
000 - disallowed 0 subnets:
000 WARNING: Either virtual_private= is not specified, or there is a syntax
000 error in that line. 'left/rightsubnet=vhost:%priv' will not
work!
000 WARNING: Disallowed subnets in virtual_private= is empty. If you have
000 private address space in internal use, it should be excluded!
000
000 ESP algorithms supported:
000
000 algorithm ESP encrypt: id=2, name=ESP_DES, ivlen=8, keysizemin=64,
keysizemax=64
000 algorithm ESP encrypt: id=3, name=ESP_3DES, ivlen=8, keysizemin=192,
keysizemax=192
000 algorithm ESP encrypt: id=6, name=ESP_CAST, ivlen=8, keysizemin=40,
keysizemax=128
000 algorithm ESP encrypt: id=7, name=ESP_BLOWFISH, ivlen=8, keysizemin=40,
keysizemax=448
000 algorithm ESP encrypt: id=11, name=ESP_NULL, ivlen=0, keysizemin=0,
keysizemax=0
000 algorithm ESP encrypt: id=12, name=ESP_AES, ivlen=8, keysizemin=128,
keysizemax=256
000 algorithm ESP encrypt: id=13, name=ESP_AES_CTR, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=14, name=ESP_AES_CCM_A, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=15, name=ESP_AES_CCM_B, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=16, name=ESP_AES_CCM_C, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=18, name=ESP_AES_GCM_A, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=19, name=ESP_AES_GCM_B, ivlen=12,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=20, name=ESP_AES_GCM_C, ivlen=16,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=22, name=ESP_CAMELLIA, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=252, name=ESP_SERPENT, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=253, name=ESP_TWOFISH, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP auth attr: id=1, name=AUTH_ALGORITHM_HMAC_MD5,
keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=2, name=AUTH_ALGORITHM_HMAC_SHA1,
keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=5, name=AUTH_ALGORITHM_HMAC_SHA2_256,
keysizemin=256, keysizemax=256
000 algorithm ESP auth attr: id=6, name=AUTH_ALGORITHM_HMAC_SHA2_384,
keysizemin=384, keysizemax=384
000 algorithm ESP auth attr: id=7, name=AUTH_ALGORITHM_HMAC_SHA2_512,
keysizemin=512, keysizemax=512
000 algorithm ESP auth attr: id=8, name=AUTH_ALGORITHM_HMAC_RIPEMD,
keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=9, name=AUTH_ALGORITHM_AES_CBC,
keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=251, name=AUTH_ALGORITHM_NULL_KAME,
keysizemin=0, keysizemax=0
000
000 IKE algorithms supported:
000
000 algorithm IKE encrypt: id=0, name=(null), blocksize=16, keydeflen=131
000 algorithm IKE encrypt: id=5, name=OAKLEY_3DES_CBC, blocksize=8,
keydeflen=192
000 algorithm IKE encrypt: id=7, name=OAKLEY_AES_CBC, blocksize=16,
keydeflen=128
000 algorithm IKE hash: id=1, name=OAKLEY_MD5, hashsize=16
000 algorithm IKE hash: id=2, name=OAKLEY_SHA1, hashsize=20
000 algorithm IKE hash: id=4, name=OAKLEY_SHA2_256, hashsize=32
000 algorithm IKE hash: id=5, name=OAKLEY_SHA2_384, hashsize=48
000 algorithm IKE hash: id=6, name=OAKLEY_SHA2_512, hashsize=64
000 algorithm IKE dh group: id=2, name=OAKLEY_GROUP_MODP1024, bits=1024
000 algorithm IKE dh group: id=5, name=OAKLEY_GROUP_MODP1536, bits=1536
000 algorithm IKE dh group: id=14, name=OAKLEY_GROUP_MODP2048, bits=2048
000 algorithm IKE dh group: id=15, name=OAKLEY_GROUP_MODP3072, bits=3072
000 algorithm IKE dh group: id=16, name=OAKLEY_GROUP_MODP4096, bits=4096
000 algorithm IKE dh group: id=17, name=OAKLEY_GROUP_MODP6144, bits=6144
000 algorithm IKE dh group: id=18, name=OAKLEY_GROUP_MODP8192, bits=8192
000 algorithm IKE dh group: id=22, name=OAKLEY_GROUP_DH22, bits=1024
000 algorithm IKE dh group: id=23, name=OAKLEY_GROUP_DH23, bits=2048
000 algorithm IKE dh group: id=24, name=OAKLEY_GROUP_DH24, bits=2048
000
000 stats db_ops: {curr_cnt, total_cnt, maxsz} :context={0,8,64}
trans={0,8,3072} attrs={0,8,2048}
000
000 Connection list:
000
000 "sample-connection-for-illustration": 20.20.0.0/16===20.20.20.150
<20.20.20.150>...10.10.0.10<10.10.0.10>===10.10.0.0/16; unrouted; eroute
owner: #0
000 "sample-connection-for-illustration": oriented; my_ip=unset;
their_ip=unset;
000 "sample-connection-for-illustration": xauth info: us:none, them:none,
my_xauthuser=[any]; their_xauthuser=[any]; ;
000 "sample-connection-for-illustration": modecfg info: us:none,
them:none, modecfg policy:push, dns1:unset, dns2:unset;
000 "sample-connection-for-illustration": labeled_ipsec:no, loopback:no;
000 "sample-connection-for-illustration": policy_label:unset;
000 "sample-connection-for-illustration": ike_life: 3600s; ipsec_life:
28800s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 0;
sha2_truncbug:no; initial_contact:no;
000 "sample-connection-for-illustration": policy:
PSK+ENCRYPT+PFS+UP+IKEv2ALLOW+SAREFTRACK+IKE_FRAG;
000 "sample-connection-for-illustration": prio: 16,16; interface: eth0;
metric: 0, mtu: unset;
000 "sample-connection-for-illustration": newest ISAKMP SA: #1; newest
IPsec SA: #0;
000 "sample-connection-for-illustration": IKE algorithms wanted:
AES_CBC(7)_256-SHA1(2)_000-MODP2048(14)
000 "sample-connection-for-illustration": IKE algorithms found:
AES_CBC(7)_256-SHA1(2)_160-MODP2048(14)
000 "sample-connection-for-illustration": IKE algorithm newest:
AES_CBC_256-SHA1-MODP2048
000 "sample-connection-for-illustration": ESP algorithms wanted:
AES(12)_256-SHA1(2)_000; pfsgroup=MODP2048(14)
000 "sample-connection-for-illustration": ESP algorithms loaded:
AES(12)_256-SHA1(2)_160
000
000 Total IPsec connections: loaded 1, active 0
000
000 State list:
000
000 #8: "sample-connection-for-illustration":500 STATE_QUICK_I1 (sent QI1,
expecting QR1); EVENT_RETRANSMIT in 20s; lastdpd=-1s(seq in:0 out:0); idle;
import:admin initiate
000 #1: "sample-connection-for-illustration":500 STATE_MAIN_I4 (ISAKMP SA
established); EVENT_SA_REPLACE in 2137s; newest ISAKMP; lastdpd=-1s(seq
in:0 out:0); idle; import:admin initiate
000
000 Shunt list:
000
server1(etc)#
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