From owner-freebsd-hackers@FreeBSD.ORG Sun Apr 20 10:20:58 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8152337B409; Sun, 20 Apr 2003 10:20:56 -0700 (PDT) Received: from boreas.isi.edu (boreas.isi.edu [128.9.160.161]) by mx1.FreeBSD.org (Postfix) with ESMTP id BCA8B43F75; Sun, 20 Apr 2003 10:20:55 -0700 (PDT) (envelope-from larse@ISI.EDU) Received: from isi.edu (c-24-130-112-121.we.client2.attbi.com [24.130.112.121]) by boreas.isi.edu (8.11.6p2/8.11.2) with ESMTP id h3KHKt123077; Sun, 20 Apr 2003 10:20:55 -0700 (PDT) Message-ID: <3EA2D6F5.4060209@isi.edu> Date: Sun, 20 Apr 2003 10:20:53 -0700 From: Lars Eggert Organization: USC Information Sciences Institute User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4a) Gecko/20030401 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Jacques A. Vidrine" References: <20030410161511.GA25681@madman.celabo.org> <20030416052335.GA2519@blossom.cjclark.org> <20030416123621.GC72501@madman.celabo.org> <20030420165538.GA31101@madman.celabo.org> In-Reply-To: <20030420165538.GA31101@madman.celabo.org> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms000906080205040907010104" cc: freebsd-hackers@FreeBSD.org cc: "Crist J. Clark" Subject: Re: Single IP host and IPsec tunnel mode experience X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 20 Apr 2003 17:20:59 -0000 This is a cryptographically signed message in MIME format. --------------ms000906080205040907010104 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit On 4/20/2003 9:55 AM, Jacques A. Vidrine wrote: > On Wed, Apr 16, 2003 at 07:36:21AM -0500, Jacques A. Vidrine wrote: > >>On Tue, Apr 15, 2003 at 10:23:35PM -0700, Crist J. Clark wrote: >> >>>'uname -a'? >> >>The endpoints were both 4.7. >> >> >>>I can't reproduce this on a 4.8 to 4.7 tunnel. On >>>192.168.64.70, >>> >>> spdadd 192.168.64.70/32 10.0.0.0/24 any -P out >>> ipsec esp/tunnel/192.168.64.70-192.168.64.20/require; >>> spdadd 10.0.0.0/24 192.168.64.70/32 any -P in >>> ipsec esp/tunnel/192.168.64.20-192.168.64.70/require; >>> >>>And on 192.168.64.20, the gateway to 10.0.0.0/24, >>> >>> spdadd 192.168.64.70/32 10.0.0.0/24 any -P in >>> ipsec esp/tunnel/192.168.64.70-192.168.64.20/require; >>> spdadd 10.0.0.0/24 192.168.64.70/32 any -P out >>> ipsec esp/tunnel/192.168.64.20-192.168.64.70/require; >>> >>>Works fine. >> >>Hmm, yes, that appears to be exactly what I'm trying to do. Well, >>that's heartening ... it means that there is likely some anomoly in my >>environment that is hosing me. Now if only I can figure what it is :-) > > > Oddly enough ... ESP works, AH does not. Are you going through a NAT box? (Sorry, haven't been following this thread closely.) AH includes more of the IP header when computing the crypto checksum (compared to ESP), if those fields get diddled by a NAT box, the receiver will drop the packets because of bad crypto. One of the netstat counters on the receiver will show this. If you need to authenticate, maybe try using ESP authentication? Lars -- Lars Eggert USC Information Sciences Institute --------------ms000906080205040907010104 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJtjCC AzgwggKhoAMCAQICEGZFcrfMdPXPY3ZFhNAukQEwDQYJKoZIhvcNAQEEBQAwgdExCzAJBgNV BAYTAlpBMRUwEwYDVQQIEwxXZXN0ZXJuIENhcGUxEjAQBgNVBAcTCUNhcGUgVG93bjEaMBgG A1UEChMRVGhhd3RlIENvbnN1bHRpbmcxKDAmBgNVBAsTH0NlcnRpZmljYXRpb24gU2Vydmlj ZXMgRGl2aXNpb24xJDAiBgNVBAMTG1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBDQTErMCkG CSqGSIb3DQEJARYccGVyc29uYWwtZnJlZW1haWxAdGhhd3RlLmNvbTAeFw0wMDA4MzAwMDAw MDBaFw0wNDA4MjcyMzU5NTlaMIGSMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBD YXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xDzANBgNVBAoTBlRoYXd0ZTEdMBsGA1UECxMUQ2Vy dGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNvbmFsIEZyZWVtYWlsIFJTQSAyMDAw 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