I P s e c Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved. Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved. Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved. Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved. 2003/12/3 2003/12/3 2003/12/3 2003/12/3 T10:IPSec ~技術概要とセキュアなネットワークの実現手法~ 第一部 IPsecの基本とリモートアクセスへの応用 新日鉄ソリューションズ株式会社 新日鉄ソリューションズ株式会社 新日鉄ソリューションズ株式会社 新日鉄ソリューションズ株式会社 基盤ソリューション事業部 基盤ソリューション事業部 基盤ソリューション事業部 基盤ソリューション事業部 マーケティング部 マーケティング部 マーケティング部 マーケティング部 松島 松島 松島 松島 正明 正明 正明 正明
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I P s e c
Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved.Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved.Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved.Copyright(c) 2003 NS Solutions Corporation, All Rights Reserved.
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IPsecIPsecIPsecIPsecのののの基本基本基本基本
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Security AssociationSecurity AssociationSecurity AssociationSecurity Association
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IKE Phase1IKE Phase1IKE Phase1IKE Phase1ネゴシエーションネゴシエーションネゴシエーションネゴシエーションの詳細の詳細の詳細の詳細
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認証認証認証認証 ResResResRes →→→→ Ini Ini Ini Ini (Pre(Pre(Pre(Pre----Shared Key)Shared Key)Shared Key)Shared Key)Initiator ResponderSGW A SGW BIKE SAIKE SAIKE SAIKE SAによって暗号化によって暗号化によって暗号化によって暗号化
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IKE Phase2IKE Phase2IKE Phase2IKE Phase2ネゴシエーションネゴシエーションネゴシエーションネゴシエーションの詳細の詳細の詳細の詳細
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パラメータ提案パラメータ提案パラメータ提案パラメータ提案
Initiator ResponderSGW A SGW BIKE SAIKE SAIKE SAIKE SAによって暗号化によって暗号化によって暗号化によって暗号化
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パラメータ選択パラメータ選択パラメータ選択パラメータ選択
ResponderSGW A SGW BIKE SAIKE SAIKE SAIKE SAによって暗号化によって暗号化によって暗号化によって暗号化
Phase2 ののののStage2で使用するで使用するで使用するで使用するHASH2HASH1 = PRF (SKEYID_a, M-ID | Ni | SA | Nr [ | KE ] [ | IDci | IDcr ] )
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IPsec SAIPsec SAIPsec SAIPsec SAの確立の確立の確立の確立
Initiator ResponderSGW A SGW BIKE SAIKE SAIKE SAIKE SAによって暗号化によって暗号化によって暗号化によって暗号化
Phase2 ののののStage3で使用するで使用するで使用するで使用するHASH3HASH1 = PRF (SKEYID_a, 0 | M-ID | Ni | Nr )
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• XAUTHXAUTHXAUTHXAUTH,,,,HyblidHyblidHyblidHyblid Auth Auth Auth Auth ともに、ともに、ともに、ともに、RadiusRadiusRadiusRadius,,,,One Time PasswordOne Time PasswordOne Time PasswordOne Time Password,,,,S/KeyS/KeyS/KeyS/Keyなどが使用可能などが使用可能などが使用可能などが使用可能
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– ESPESPESPESPは、は、は、は、IPIPIPIPヘッダのすぐ後に、ヘッダのすぐ後に、ヘッダのすぐ後に、ヘッダのすぐ後に、ESPESPESPESPヘッダがあるため、ヘッダがあるため、ヘッダがあるため、ヘッダがあるため、NAPTNAPTNAPTNAPT((((Network Address Port TranslationNetwork Address Port TranslationNetwork Address Port TranslationNetwork Address Port Translation))))に対応できなに対応できなに対応できなに対応できない。(い。(い。(い。(1111対1の対1の対1の対1のNATNATNATNATには対応可能)には対応可能)には対応可能)には対応可能)
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◆◆◆◆KEKEKEKE◆◆◆◆NATNATNATNAT----D (Source IP & PortD (Source IP & PortD (Source IP & PortD (Source IP & Port))))◆◆◆◆NATNATNATNAT----D (Destination IP & Port)D (Destination IP & Port)D (Destination IP & Port)D (Destination IP & Port)
◆◆◆◆KEKEKEKE◆◆◆◆NATNATNATNAT----D (Source IP & PortD (Source IP & PortD (Source IP & PortD (Source IP & Port))))◆◆◆◆NATNATNATNAT----D (Destination IP & Port)D (Destination IP & Port)D (Destination IP & Port)D (Destination IP & Port)
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User AInterface:192.168.0.1Virtual :10.0.1.1VPN DNS:192.168.1.2
User BInterface:192.168.0.1Virtual :10.0.1.2VPN DNS:192.168.1.2
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1414141414141414B B B B B B B B 44444444B B B B B B B B 2020202020202020B B B B B B B B 1212121212121212B B B B B B B B 1616161616161616B B B B B B B B ESPトレーラトレーラトレーラトレーラ
最大最大最大最大最大最大最大最大257257257257257257257257B B B B B B B B
4646464646464646~~~~~~~~14441444144414441444144414441444B B B B B B B B
PPPoEヘッダヘッダヘッダヘッダ
PPPヘッダヘッダヘッダヘッダ
66666666B B B B B B B B 22222222B B B B B B B B EthernetEthernetEthernetEthernetEthernetEthernetEthernetEthernet
1414141414141414B B B B B B B B 44444444B B B B B B B B 2020202020202020B B B B B B B B 1212121212121212B B B B B B B B 1616161616161616B B B B B B B B ESPトレーラトレーラトレーラトレーラ
最大最大最大最大最大最大最大最大257257257257257257257257B B B B B B B B
4646464646464646~~~~~~~~14521452145214521452145214521452B B B B B B B B
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MTU of next hop MTU of next hop MTU of next hop MTU of next hop ::::1200B1200B1200B1200B
PMTUPMTUPMTUPMTU送信送信送信送信
MTU of next hopMTU of next hopMTU of next hopMTU of next hop1127B1127B1127B1127B
データデータデータデータ IPヘッダヘッダヘッダヘッダ
ESPヘッダヘッダヘッダヘッダ
14531453145314531453145314531453B B B B B B B B
データデータデータデータ IPヘッダヘッダヘッダヘッダ
ESPヘッダヘッダヘッダヘッダ
12001200120012001200120012001200B B B B B B B B
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IPsec IPsec IPsec IPsec vs vs vs vs SSL VPNSSL VPNSSL VPNSSL VPN
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