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1.0 Introduction to OpenBSD

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The OpenBSD project maintains several popular mailing lists which users should subscribe to and follow. To subscribe to a ...

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IPsec in Tunnel Mode between Windows XP Professional and OpenBSD with X.509v3 Certificate AuthenticationPage 1IPsec in Tunnel Mode between Windows XPProfessional and OpenBSD withX.509v3 Certificate AuthenticationThomas Walpuski<thomas@koeln.h07.org>Februa ry 7th 2002Translated into English by Mike van Opstal mvanopst@cs.umd.eduFor the fundamental understanding of this paper knowledge of IPsec is not mandatorybut nevertheless helpful. As an introduction its recommended to read:http://www.informatik.unibremen.de/gr p/agsec/Seminar/WS00/ipsec.ps.The following paper describes in detail the configuration of an IPsec HosttoHostconnection between OpenBSD and Windows XP Professional with Authentication via X.509v3Certificates. A VPN can be implemented with simple modifications. Windows XP ProfessionalsIPsec implementation corresponds approximately to that of Windows 2000 Professional with theHigh Encryption Service Pack (3DES). Most sections of this papers descriptions can also beused with Windows 2000 Professional.1 PreparationBefore we can really begin with the configuration we must first produce the necessaryRSA keys and certificates.1.1 RSAKey and Certificate for the CAIf no Certificate Authority is available to be used the first step is to create the RSA keysfor the CA.# openssl genrsa out /etc/ssl/private/ca.key 1024Generating RSA private key 1024 bit long modulus...............................++++ ++....++++++e is 65537 (0x10001Then you need to create a CSR (Certificate Signing Request) for this.# openssl req new key /etc/ssl/private/ca.key out > /etc/ssl/private/ca.csrUsing configuration from /etc/ssl/openssl.cnfYou are about to be asked to enter information that will be incorporatedinto your certificate request.What you are about to enter is what is called a Distinguished Name or aDN.There are quite a few fields but you can leave some blankFor some fields there will be a default valueIf you enter . the field will be left blank.Country Name (2 letter code) ]: ...

Source: cdrom.gnutemberg.org

 

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