[strongSwan] Error : remote host is behind NAT - received proposals inacceptable - generating IKE_SA_INIT response 0 [ N(NO_PROP) ]

IL Ka kazakevichilya at gmail.com
Fri Feb 15 08:17:05 CET 2019


I see DH problem as Tobias said.
look:

Client:

IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048,
IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048,
IKE:AES_CBC_256/HMAC_SHA2_384_192/PRF_HMAC_SHA2_384/MODP_2048

StrongSwan:
IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
IKE:AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024

Client wants MODP_2048 while Swan has only MODP_1024 enabled.

As result, "no acceptable DIFFIE_HELLMAN_GROUP found"

See ipsec.conf for "ike" setting. Especially about "modpgroup".




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On Fri, Feb 15, 2019 at 8:42 AM MOSES KARIUKI <kariukims at gmail.com> wrote:

> Dear Team,
> Please see below:
>
> *ipsec statusall*
> Status of IKE charon daemon (strongSwan 5.6.2, Linux 4.15.0-45-generic,
> x86_64):
>   uptime: 17 hours, since Feb 14 11:52:17 2019
>   malloc: sbrk 1757184, mmap 0, used 534320, free 1222864
>   worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0,
> scheduled: 0
>   loaded plugins: charon aesni aes rc2 sha2 sha1 md4 md5 mgf1 random nonce
> x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey
> sshkey pem openssl fips-prf gmp agent xcbc hmac gcm attr kernel-netlink
> resolve socket-default connmark stroke updown eap-mschapv2 xauth-generic
> counters
> Virtual IP pools (size/online/offline):
>   10.10.10.0/24: 254/0/0
> Listening IP addresses:
>   102.1*9.2*9.**
> Connections:
>    ikev2-vpn:  %any...%any  IKEv2, dpddelay=300s
>    ikev2-vpn:   local:  [102.1*9.2*9.**] uses public key authentication
>    ikev2-vpn:    cert:  "CN=102.1*9.2*9.**"
>    ikev2-vpn:   remote: [fromcert] uses EAP_MSCHAPV2 authentication with
> EAP identity '%any'
>    ikev2-vpn:   child:  0.0.0.0/0 === dynamic TUNNEL, dpdaction=clear
> Security Associations (0 up, 0 connecting):
>   none
>
>
> *systemctl status strongswan*
> ● strongswan.service - strongSwan IPsec IKEv1/IKEv2 daemon using ipsec.conf
>    Loaded: loaded (/lib/systemd/system/strongswan.service; enabled; vendor
> preset: enabled)
>    Active: active (running) since Thu 2019-02-14 11:52:17 UTC; 17h ago
>  Main PID: 2204 (starter)
>     Tasks: 18 (limit: 2275)
>    CGroup: /system.slice/strongswan.service
>            ├─2204 /usr/lib/ipsec/starter --daemon charon --nofork
>            └─2232 /usr/lib/ipsec/charon --debug-ike 1 --debug-knl 1
> --debug-cfg 2
>
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[CFG] received proposals:
> IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048, IKE:AES_C
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[CFG] configured proposals:
> IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024, IKE:AES
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[IKE] remote host is behind NAT
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[IKE] received proposals inacceptable
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[ENC] generating IKE_SA_INIT response 0 [ N(NO_PROP) ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 09[NET] sending packet: from 102.1*9.2*9.**[500] to 154.153.1*0.***[500]
> (36 bytes)
> Feb 15 05:31:32 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 10[CFG] proposing traffic selectors for us:
> Feb 15 05:31:32 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 10[CFG]  0.0.0.0/0
> Feb 15 05:31:32 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 10[CFG] proposing traffic selectors for other:
> Feb 15 05:31:32 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon[2232]:
> 10[CFG]  dynamic
>
> The error log:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[NET]
> received packet: from 154.153.1*0.***[500] to 102.1*9.2*9.**[500] (632
> bytes)
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[ENC]
> parsed IKE_SA_INIT request 0 [ SA KE No N(FRAG_SUP) N(NATD_S_IP)
> N(NATD_D_IP) V V V V ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[DMN] Starting IKE charon daemon (strongSwan 5.6.2, Linux
> 4.15.0-45-generic, x86_64)
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading ca certificates from '/etc/ipsec.d/cacerts'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG]   loaded ca certificate "CN=VPN root CA" from
> '/etc/ipsec.d/cacerts/ca-cert.pem'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading aa certificates from '/etc/ipsec.d/aacerts'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading ocsp signer certificates from '/etc/ipsec.d/ocspcerts'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading attribute certificates from '/etc/ipsec.d/acerts'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading crls from '/etc/ipsec.d/crls'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG] loading secrets from '/etc/ipsec.secrets'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG]   loaded RSA private key from '/etc/ipsec.d/private/server-key.pem'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[CFG]   loaded EAP secret for remoteprivate
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[LIB] loaded plugins: charon aesni aes rc2 sha2 sha1 md4 md5 mgf1 random
> nonce x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp
> dnskey sshkey pem openssl fips-prf gmp agent xcbc hmac gcm attr
> kernel-netlink resolve socket-default connmark stroke updown eap-mschapv2
> xauth-generic counters
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[LIB] dropped capabilities, running as uid 0, gid 0
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 00[JOB] spawning 16 worker threads
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG] received stroke: add connection 'ikev2-vpn'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG] conn ikev2-vpn
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   left=%any
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   leftsubnet=0.0.0.0/0
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   leftid=102.1*9.2*9.**
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   leftcert=server-cert.pem
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   right=%any
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   rightsourceip=10.10.10.0/24
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   rightdns=8.8.8.8,8.8.4.4
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   rightauth=eap-mschapv2
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   rightid=%fromcert
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   eap_identity=%identity
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   ike=aes256-sha1-modp1024,aes128-sha1-modp1024,3des-sha1-modp1024!
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   esp=aes256-sha256,aes256-sha1,3des-sha1!
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   dpddelay=300
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   dpdtimeout=150
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   dpdaction=1
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   sha256_96=no
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   mediation=no
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   keyexchange=ikev2
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG] adding virtual IP address pool 10.10.10.0/24
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG]   loaded certificate "CN=102.1*9.2*9.**" from 'server-cert.pem'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 05[CFG] added configuration 'ikev2-vpn'
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[NET] received packet: from 216.218.206.86[8310] to 102.1*9.2*9.**[500]
> (64 bytes)
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[ENC] parsed ID_PROT request 0 [ SA ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> looking for an ike config for 102.1*9.2*9.**...154.153.1*0.***
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[CFG] looking for an ike config for 102.1*9.2*9.**...216.218.206.86
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[IKE] no IKE config found for 102.1*9.2*9.**...216.218.206.86, sending
> NO_PROPOSAL_CHOSEN
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[ENC] generating INFORMATIONAL_V1 request 2332246493 [ N(NO_PROP) ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 08[NET] sending packet: from 102.1*9.2*9.**[500] to 216.218.206.86[8310]
> (40 bytes)
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[NET] received packet: from 154.153.1*0.***[500] to 102.1*9.2*9.**[500]
> (632 bytes)
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[ENC] parsed IKE_SA_INIT request 0 [ SA KE No N(FRAG_SUP) N(NATD_S_IP)
> N(NATD_D_IP) V V V V ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] looking for an ike config for 102.1*9.2*9.**...154.153.1*0.***
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   candidate: %any...%any, prio 28
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] found matching ike config: %any...%any with prio 28
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[IKE] received MS NT5 ISAKMPOAKLEY v9 vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[IKE] received MS-Negotiation Discovery Capable vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[IKE] received Vid-Initial-Contact vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[ENC] received unknown vendor ID:
> 01:52:8b:bb:c0:06:96:12:18:49:ab:9a:1c:5b:2a:51:00:00:00:02
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[IKE] 154.153.1*0.*** is initiating an IKE_SA
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable DIFFIE_HELLMAN_GROUP found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable PSEUDO_RANDOM_FUNCTION found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable PSEUDO_RANDOM_FUNCTION found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG]   no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] received proposals:
> IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_384_192/PRF_HMAC_SHA2_384/MODP_2048
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  candidate: %any...%any, prio 28
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a ipsec[2204]:
> 09[CFG] configured proposals:
> IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> found matching ike config: %any...%any with prio 28
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> received MS NT5 ISAKMPOAKLEY v9 vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> received MS-Negotiation Discovery Capable vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> received Vid-Initial-Contact vendor ID
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[ENC]
> received unknown vendor ID:
> 01:52:8b:bb:c0:06:96:12:18:49:ab:9a:1c:5b:2a:51:00:00:00:02
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> 154.153.1*0.*** is initiating an IKE_SA
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable DIFFIE_HELLMAN_GROUP found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable PSEUDO_RANDOM_FUNCTION found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable PSEUDO_RANDOM_FUNCTION found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> selecting proposal:
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
>  no acceptable ENCRYPTION_ALGORITHM found
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> received proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_384_192/PRF_HMAC_SHA2_384/MODP_2048
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> configured proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> received proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048,
> IKE:AES_CBC_256/HMAC_SHA2_384_192/PRF_HMAC_SHA2_384/MODP_2048
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[CFG]
> configured proposals: IKE:AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024,
> IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> remote host is behind NAT
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[IKE]
> received proposals inacceptable
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[ENC]
> generating IKE_SA_INIT response 0 [ N(NO_PROP) ]
> Feb 15 05:11:49 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a charon: 09[NET]
> sending packet: from 102.1*9.2*9.**[500] to 154.153.1*0.***[500] (36 bytes)
> Feb 15 05:11:50 VM-e2b7eaee-4c52-4455-8364-c1977c8afa6a kernel:
> [68232.190082] [UFW BLOCK] IN=ens3 OUT=
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.153.1*0.***
> DST=102.1*9.2*9.** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=15775 DF PROTO=TCP
> SPT=54821 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> ....
>
>
>
> On Thu, Feb 14, 2019 at 5:37 PM MOSES KARIUKI <kariukims at gmail.com> wrote:
>
>> Thanks Tobias for the feedback. Let me try from another machine and
>> revert back to you.
>>
>> Thanks a lot,
>> Moses K
>>
>> On Thu, Feb 14, 2019 at 5:30 PM Tobias Brunner <tobias at strongswan.org>
>> wrote:
>>
>>> Hi Moses,
>>>
>>> > But now it gives the error that it didn't
>>> > connect as the remote host did not resolve . :(
>>>
>>> That doesn't sound like it's in any way related to your previous issue.
>>>  And until you fix that (DNS, firewall or whatever else the problem is)
>>> the config updates or the log won't help as the client won't send any
>>> packets to the server.
>>>
>>> Also, log level 9 makes no sense as 4 is the maximum and is too much
>>> either.  Set it to 2 (even 1 would be enough to debug the proposal
>>> issue, though).
>>>
>>> Regards,
>>> Tobias
>>>
>>
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