Dialup IPsec VPN II

Description

NSE4 6.0 NSE4 6.0 Quiz on Dialup IPsec VPN II, created by Marcos Avila on 13/09/2018.
Marcos Avila
Quiz by Marcos Avila, updated more than 1 year ago
Marcos Avila
Created by Marcos Avila about 6 years ago
8
1

Resource summary

Question 1

Question
Uses UDP port 500 (and UDP port 4500 when crossing NAT) Negotiates a tunnel’s private keys, authentication, and encryption One lPsec SA is used per traffic direction. Phases: Phase1 Phase2
Answer
  • IKE
  • ESP
  • AH

Question 2

Question
Phase 1 negotiation modes
Answer
  • main mode aggresive mode
  • main mode quick mode

Question 3

Question
Phase 2 negotiation mode
Answer
  • aggresive mode
  • quick mode

Question 4

Question
takes place when each endpoint of the tunnel—the initiator and the responder—connects and begins to set up the VPN.
Answer
  • Phase 1
  • Phase 2

Question 5

Question
[blank_start]2.[blank_end] Negotiate one bidirectional SA (called IKE SA) *ln IKE v1, two possible ways: -Main mode: six packets exchanged -Aggressive mode: three packets exchanged *Not the same as final SAs later *Encrypted tunnel for Diffie-Hellman (DH) [blank_start]1 .[blank_end] Authenticate peers *Pre—shared key or digital signature *Extended authentication (XAuth) [blank_start]3.[blank_end] DH exchange for secret keys
Answer
  • 2.
  • 1 .
  • 3.

Question 6

Question
Key agreement method: Independently calculate a private key using only public keys Each FortiGate uses a shared secret key plus a nonce to calculate keys for the following: Symmetric encryption algorithms (such as 3DES, AES) Symmetric authentication (HMACs)
Answer
  • Diffie-Hellman
  • IKE
  • ESP

Question 7

Question
ESP can´t support NAT because it has no port numbers.
Answer
  • True
  • False

Question 8

Question
Negotiates two unidirectional SAs for ESP (called lPsec SAS) Protected by phase IKE SA When SAs are about to expire, it renegotiates Optionally, if Perfect Forward Secrecy is set to Enabled, FortiGate uses Diffie-Hellman to generate new keys each time phase 2 expires. Each phase 1 can have multiple phase 2s. High security subnets can have stronger ESP.
Answer
  • Phase 2
  • Phase 1

Question 9

Question
Also, if you set ____________ to Enable, each time phase 2 expires, FortiGate will use Diffie-Hellman to recalculate new secret keys. In this way, new keys are not derived from older keys, making it much harder for an attacker to crack the tunnel.
Answer
  • Perfect Forward Secrecy
  • NAT-Transversal
  • Split tunneling

Question 10

Question
If multiple phase 2 exist, FortiGate directs traffic to the correct phase 2. Allows granular security settings for each LAN. If traffic does not match an lPsec SA selector, it is dropped. ln point-to-pointVPNs, selectors must match. - The source on one FortiGate is the destination setting on the other. Select which SA to apply using: Destination and source IP subnet(s) Protocol number Source port and destination port
Answer
  • Quick mode selectors
  • Phase 2
  • Phase 1
  • Agressive mode

Question 11

Question
During phase 2, you must configure a pair of settings called quick mode selectors. They identify and direct traffic to the appropriate phase 2. In other words, they allow granular SAs.
Answer
  • True
  • False

Question 12

Question
In aggressive mode, how many packets are exchanged to establish phase 1 of the lPsec tunnel?
Answer
  • A. Six
  • B. Three

Question 13

Question
Which statement about quick mode selectors is true?
Answer
  • A. Only phase 2 has quick mode selectors.
  • B. Only phase 1 has quick mode selectors.

Question 14

Question
Settings need in Dialup VPN between two fortigates
Answer
  • A phase 1 At least one phase 2 Firewall policies Static routes or a dynamic routing protocol
  • A phase 1 At least one phase 2 Firewall policies Static routes or a dynamic routing protocol IPsec interface

Question 15

Question
Dialup IPsec is also known as
Answer
  • A. point-to-point
  • B. point-to—multipoint

Question 16

Question
IKE mode configuration automatically configures network settings?
Answer
  • A. client
  • B. server
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