Hi All, A quick update to my last query.
Make clean and a reboot seems to have fixed the issue. I haven’t modified any strongswan code so it should not have mattered. Anyways. Now I can see the IKE PH1 complete. *Dec 13 17:14:29.259: ISAKMP:(1008):Input = IKE_MESG_INTERNAL, IKE_PHASE1_COMPLETE *Dec 13 17:14:29.259: ISAKMP:(1008):Old State = IKE_P1_COMPLETE New State = IKE_P1_COMPLETE Thanks. Makarand Pradhan Senior Software Engineer. iS5 Communications Inc. #1-1815 Meyerside Drive Mississauga, Ontario L5T 1G3 Main Line: +1-844-520-0588 Ext. 129 Direct Line: +1-289-724-2296 Cell: +1-226-501-5666 Fax:+1-289-401-5206 Email: [email protected] Website: www.iS5Com.com Confidentiality Notice: This message is intended only for the named recipients. This message may contain information that is confidential and/or exempt from disclosure under applicable law. Any dissemination or copying of this message by anyone other than a named recipient is strictly prohibited. If you are not a named recipient or an employee or agent responsible for delivering this message to a named recipient, please notify us immediately, and permanently destroy this message and any copies you may have. Warning: Email may not be secure unless properly encrypted. -----Original Message----- From: Users <[email protected]> On Behalf Of Makarand Pradhan Sent: December 12, 2019 2:31 PM To: [email protected] Subject: [strongSwan] Wrong DH group and hash in IKE phase 1 proposal Hello Everyone, I'm trying to set up a tunnel between Strongswan and Cisco 2811. I'm following instructions per: https://www.cisco.com/c/en/us/support/docs/ip/internet-key-exchange-ike/117258-config-l2l.html Phase 1 parameters are configured in ipsec.conf as: keyexchange=ikev1 ike=aes128-md5-modp1536 When I try starting up the tunnel, the IKE proposal sent out contains: Per log on Cisco router: *Dec 12 21:32:39.438: ISAKMP: encryption AES-CBC *Dec 12 21:32:39.438: ISAKMP: keylength of 128 *Dec 12 21:32:39.438: ISAKMP: hash SHA256 *Dec 12 21:32:39.438: ISAKMP: unknown DH group 31 *Dec 12 21:32:39.438: ISAKMP: auth pre-share *Dec 12 21:32:39.438: ISAKMP: life type in seconds *Dec 12 21:32:39.438: ISAKMP: life duration (basic) of 1520 I've captured the packet in wireshark and the packet indicates the wrong DH group and wrong hash. I've attached the captured pcap file. My ipsec.conf file is as follows: config setup charondebug=ike 4 #####IS5##### conn m1 type=tunnel authby=secret auto=add keyexchange=ikev1 ike=aes128-md5-modp1536 esp=aes128-sha1 ikelifetime=1520 right=80.0.0.3 rightid=80.0.0.3 rightsubnet=10.10.3.0/24 left=80.0.0.2 leftid=80.0.0.2 leftsubnet=192.168.0.0/16 I've tried changing to 3DES and SHA512 and different DH groups in ipsec.conf. All the same, I always see AES-SHA256-DHGRP31 going out. Any opinions or suggestions to correct my ipsec.conf would be highly appreciated. With rgds, Makarand.
