スズキです。 ike-scan 自体は、下記の記事が参考になります。 IPsec VPN Penetration Testing with BackTrack Tools ポイントは下記 ike-scan の実行結果の部分でしょうか? 0 returned handshake; 0 returned notify This means the target is not an IPsec gateway. 1 returned handshake; 0 returned notify This means the target is configured for IPsec and is willing to perform IKE negotiation, and either one or more of the transforms you proposed are acceptab