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2: Practical Overview of the IPsec Protocol in Objective-C Implementation ANSI/AIM Code 39 in Objective-C 2: Practical Overview of the IPsec Protocol




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2: Practical Overview of the IPsec Protocol using iphone toreceive barcode 3 of 9 for asp.net web,windows application ISO/IEC 18004:2000 A Very Brief Overview of Cryptography Valid Packet Rewriting Ciphers DES, 3DES, and AES 27 28 28. Algorithms Uniqueness Public-Key Algorithms Exchanging Public Keys Digital Signatures Diffie-Hellman Key Exchange Avoiding the Man in the Middle Session Keys Crypto Requirements for IPsec IPsec: A Suite of Protocols Kernel Mode: Packet Handling Authentication Header (AH) Encapsulated Security Payload (ESP) Transport and Tunnel Mode Choosing the IPsec Mode and Type The Kernel State Encryption Details Manual Keying Final Note on Protocols and Ports Usermode: Handling the Trust Relationships The IKE Protocol. Phase 1: Creating the ISAKMP SA 29 30 30 30 30 30 31 31 32 32 32 33 34 34 35 35 36 36 37 37 37. Table of Contents Phase 2: Quick Mode The NAT Problem 39 41. Summary. 3: Building and Installing Openswan Linux Distr ibutions Red Hat Debian SuSE Slackware Gentoo Linux "Router" Distributions Deciding on the Userland Pluto Racoon Isakmpd More Reasons to Pick Pluto Choosing the Kernel IPsec Stack KLIPS, the Openswan Stack. ipsecX Interfaces First Packet Caching Path MTU Discovery KLIPS" Downside 45 46 46 46 47 47 48 48 48 49 50 50 50 50. 51 51 51 52. NETKEY, the 2.6 IPsec Stack The USAGI / SuSE IPsec Stack Making the Choice GPL Compliance and KLIPS Binary Installation of the Openswan Userland Checking for Old Versions Installing the Binary Package for Openswan Building from Source Using RPM-based Distributions Rebuilding the Openswan Userland Building src.rpm from Scratch Openswan Options Building the Openswan Userland from Source Downloading the Source Code Configuring the Userland Tools.

Optional Features Compile Flags 53 53 54 54 54 55 55 56 57 58 58 59 59 59 59. 60 61. Table of Contents File Path Options Obscure Pluto Options 62 62. Compiling a Code 3/9 for Objective-C nd Installing Binary Installation of KLIPS Building KLIPS from Source Kernel Prerequisites Identifying your Kernel"s Abilities Using Both KLIPS and NETKEY The Kernel Build Options. Required Kernel Options Desired Options NETKEY Stack Options KLIPS Stack Options L2TP Options 63 63 64 64 65 65 65. 66 66 66 67 68. Patching the Kernel NAT-Traversal Patch KLIPS Compile Shortcut Activating KLIPS Determining the Stack in Use 69 69 70 70. Building KL IPS into the Linux Kernel Source Tree Building a Standard Kernel NAT Traversal Patching KLIPS into the Linux Kernel Verifying the Installation Summary. 71 71 72 72 74 74. 4: Configuring IPsec Manual vers barcode 3 of 9 for Objective-C us Automatic PSK versus RSA Pitfalls of Debugging IPsec Pre-Flight Check The ipsec verify Command NAT and Masquerading Checking External Commands Opportunistic Encryption The ipsec livetest Command Configuration of Openswan The ipsec.conf File. 75 76 76 77 77 78 79 79 79 80 81. Table of Contents Host-to-Hos t Tunnel Left and Right The type Options The auto Option The rsasigkey Options Bringing Up the IPsec Tunnels Listing IPsec Connections Testing the IPsec Tunnel Connecting Subnets Through an IPsec Connection Testing Subnet Connections Testing Properly Encrypting the Host and the Network Behind It. Employing Advanced Routing Creating More Tunnels 82 82 83 83 84 84 85 85 86 87 87 88. 88 88. Avoiding Du plication The Also Keyword KLIPS and the ipsecX Interfaces Pre-Shared Keys (PSKs) Proper Secrets Dynamic IP Addresses Hostnames Roadwarriors Multiple Roadwarrior Connections Dynamic IP and PSKs PSK and NAT Mixing PSK and RSA Connection Management Subnet Extrusion NAT Traversal Deprecated Syntax Confirming a Functional NAT-T Dead Peer Detection DPD Works Both Ways Configuring DPD Buggy Cisco Routers Ciphers and Algorithms Using ike= to Specify Phase 1 Parameters Using esp= to Specify Phase 2 Parameters. 89 89 89 90 iPhone Code 39 Full ASCII 90 90 91 91 92 92 93 93 93 94 96 97 97 98 99 99 100 101 101 102. Table of Contents Defaults an Code 3/9 for Objective-C d Strictness Unsupported Ciphers and Algorithms Aggressive Mode XAUTH XAUTH Gateway (Server Side) XAUTH Client (Supplicant Side) Fine Tuning Perfect Forward Secrecy Rekeying Key Rollover Summary. 102 103 103 104 105 105 106 106 106 107 107. 5: X.509 Certificates X.509 Certi ficates Explained X.509 Objects X.

509 Packing Types of Certificates Passphrases, PIN Codes, and Interactivity IKE and Certificates Using the Certificate DN as ID for Openswan Generating Certificates with OpenSSL Setting the Time Configuring OpenSSL. Be Consistent with All Certificates 109 110 112 112 113 113 113 114 114 114. OpenSSL Com barcode 39 for Objective-C mands for Common Certificate Actions Configuring Apache for IPsec X.509 Files Creating X.509-based Connections Using a Certificate Authority Using Multiple CAs Sending and Receiving Certificate Information Creating your own CA using OpenSSL Creating Host Certificates with Your Own CA.

Host Certif icates for Microsoft Windows (PKCS#12). 115 116 117 3 of 9 barcode for Objective-C 120 121 122 122 123.
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