IPsec 기술은 양단간 보안은 물론, 모드, 암호 프로토콜, 다양한 암호화 알고리즘들의 조합을 통해서 다양하고 계층적인 보안 서비스를 제공한다. VPN 서비스가 제공되는 가장 일반적인 유형은 원격 접속자의 공동 인트라넷에 대한 접근을 허용하는 것이다. 하지만 NAT(Network Address Translation) 기술이 호텔과 같이 원격 접속자가 주로 사용하는 곳은 물론 홈 게이트웨이와 같은 네트워크 장치에 널리 사용되고 있어 IPsec 을 통한 양단간 통합 보안 서비스를 제공하는데 치명적인 장애가 발생한다. 따라서 본 논문에서는 IPsec 기술을 NAT 상의 네트워크에 적용할 때 발생하는 문제점과 기존의 해결 방안에 대해서 언급하고 이들의 장 단점을 분석한다. 또한 효율적으로 IPsec 기술을 NAT 네트워크 상에 적용할 수 있는 새로운 연동 방안을 제시함으로써 네트워크 구조에 독립적인 보안 서비스를 제공하고자 한다.
KSP Keywords
Network Address Translation
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