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Transparent Firewalls and VPNs

When the Cisco ASA runs in transparent mode, the following limitations and restrictions apply to configuring the IPSec tunnels on it:

  • The ASA can terminate the IPSec tunnels for management purposes only. That means you cannot establish an IPSec tunnel to pass traffic through the Cisco ASA.
  • An IPSec tunnel is allowed only if the ASA is running in single mode. Multimode transparent firewalls and IPSec VPNs are not supported.
  • WebVPN and IPSec remote-access VPNs are not supported. You can configure only one site-to-site IPSec tunnel, which needs to be set up in answer mode to respond to a tunnel request.
  • The ASA does not affect the IPSec tunnels going through it. You may still set up ACLs to block unnecessary IPSec traffic passing through the ASA.
  • Because routing protocols are not supported in transparent mode, reverse route injection (RRI) is also not supported.
  • The IPSec tunnel uses the management IP address to terminate the connection. The IPSec tunnel could be terminated on either interfaceinside or outside.
  • Load balancing, stateful failover, QoS, and NAT over the VPN tunnel are not supported in IPSec VPN implementations.
  • NAT Traversal (NAT-T) and public key infrastructure (PKI) are fully supported in transparent mode for the management tunnel.

Part I: Product Overview

Introduction to Network Security

Product History

Hardware Overview

Part II: Firewall Solution

Initial Setup and System Maintenance

Network Access Control

IP Routing

Authentication, Authorization, and Accounting (AAA)

Application Inspection

Security Contexts

Transparent Firewalls

Failover and Redundancy

Quality of Service

Part III: Intrusion Prevention System (IPS) Solution

Intrusion Prevention System Integration

Configuring and Troubleshooting Cisco IPS Software via CLI

Part IV: Virtual Private Network (VPN) Solution

Site-to-Site IPSec VPNs

Remote Access VPN

Public Key Infrastructure (PKI)

Part V: Adaptive Security Device Manager

Introduction to ASDM

Firewall Management Using ASDM

IPS Management Using ASDM

VPN Management Using ASDM

Case Studies

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Cisco Asa(c) All-in-one Firewall, IPS, And VPN Adaptive Security Appliance
Cisco ASA: All-in-One Firewall, IPS, and VPN Adaptive Security Appliance
ISBN: 1587052091
EAN: 2147483647
Year: 2006
Pages: 231
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