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300-730 · Question #47

Which two statements are true when designing a SSL VPN solution using Cisco AnyConnect? (Choose two.)

The correct answer is D. The VPN IP address pool can overlap with the rest of the LAN networks. E. DTLS can be enabled for better performance. In a Cisco AnyConnect SSL VPN design, DTLS can be enabled for better performance and the VPN IP pool is permitted to overlap with internal LAN subnets.

Remote Access VPN

Question

Which two statements are true when designing a SSL VPN solution using Cisco AnyConnect? (Choose two.)

Options

  • AThe VPN server must have a self-signed certificate.
  • BA SSL group pre-shared key must be configured on the server.
  • CServer side certificate is optional if using AAA for client authentication.
  • DThe VPN IP address pool can overlap with the rest of the LAN networks.
  • EDTLS can be enabled for better performance.

How the community answered

(49 responses)
  • A
    10% (5)
  • B
    2% (1)
  • C
    4% (2)
  • D
    84% (41)

Why each option

In a Cisco AnyConnect SSL VPN design, DTLS can be enabled for better performance and the VPN IP pool is permitted to overlap with internal LAN subnets.

AThe VPN server must have a self-signed certificate.

A self-signed certificate is not required - Cisco best practice requires a CA-signed certificate on the ASA to prevent client trust warnings, and self-signed certs are discouraged in production AnyConnect deployments.

BA SSL group pre-shared key must be configured on the server.

SSL group pre-shared keys are not part of AnyConnect SSL VPN design - pre-shared keys are used in IPsec IKE phase 1 negotiations and have no equivalent role in SSL/TLS-based VPN connections.

CServer side certificate is optional if using AAA for client authentication.

The server-side certificate is not optional even when AAA handles client authentication - TLS requires the server to present a certificate to complete the SSL handshake regardless of the client authentication method selected.

DThe VPN IP address pool can overlap with the rest of the LAN networks.Correct

The VPN IP address pool can overlap with existing LAN networks because the AnyConnect client uses a virtual adapter and the ASA headend handles routing through the tunnel interface, so layer-3 address overlap between the pool and internal ranges does not cause a fundamental connectivity failure.

EDTLS can be enabled for better performance.Correct

DTLS (Datagram TLS) uses UDP as its transport and can be enabled alongside standard TLS to reduce latency and improve throughput, particularly for real-time and latency-sensitive applications, making it a valid and recommended design choice for performance optimization.

Concept tested: Cisco AnyConnect SSL VPN design with DTLS and IP pool overlap

Source: https://www.cisco.com/c/en/us/td/docs/security/asa/asa96/configuration/vpn/asa-96-vpn-config/vpn-anyconnect.html

Topics

#AnyConnect#SSL VPN design#DTLS#IP address pool

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