HP A7533A - Brocade 4Gb SAN Switch Base, Administrator'S Manual

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146 Configuring advanced security features
Securing the management interface
You can secure an Ethernet management interface between two B-Series switches or enterprise-class
platforms by implementing IPsec and IKE policies to create a tunnel that protects traffic flows. The tunnel
has at each end a B-Series switch or enterprise-class platform. There may be routers, gateways, and
firewalls in between the two ends.
IMPORTANT: Enabling secure IPsec tunnels does not provide IPsec protection for traffic flows on the
external management interfaces of intelligent blades in a chassis, nor does it support protection of traffic
flows on FCIP interfaces.
Internet Protocol security (IPsec) is a framework of open standards that ensures private and secure
communications over Internet Protocol (IP) networks through the use of cryptographic security services. The
goal of IPsec is to provide the following capabilities:
• Authentication: Ensures that the sending and receiving end-users and devices are known and trusted by
one another.
• Data Integrity: Confirms that the data received was in fact the data transmitted.
• Data Confidentiality: Protects the user data being transmitted, such as utilizing encryption to avoid
sending data in clear text.
• Replay Protection: Prevents replay attack, a type of denial of service (DoS) attack where an attacker
intercepts a series of packets and resends them to cause the recipient to waste CPU cycles processing
them.
• A utomated Key Management: Automates the process, as well as manages the periodic exchange and
generation of new keys.
Using the
ipsecConfig
command, you must configure multiple security policies for traffic flows on the
Ethernet management interfaces based on IPv4 or IPv6 addresses, a range of IPv4 or IPv6 addresses, the
type of an application, port numbers, and port types used (UDP/TCP). You must specify the transforms and
processing choices for the traffic flow (drop, protect or bypass). Also, you must select and configure the key
management protocol using an automatic or manual key.
For more information on IPv4 and IPv6 addressing, see Chapter 1, ”
Performing basic configuration tasks ”
on page 29.
Configuration examples
This section contains several examples of various configurations you can use to implement an IPsec tunnel
between two devices.
Endpoint-to-Endpoint Transport or Tunnel
In this scenario, both endpoints of the IP connection implement IPsec, as required of hosts in RFC4301. The
transport mode is commonly used with no inner IP header. If there is an inner IP header, the inner
addresses will be the same as the outer addresses. A single pair of addresses will be negotiated for
packets protected by this SA (see Figure 5 ).
Table 40 Fabric merges with tolerant/absent combinations
Fabric-wide consistency policy setting Expected behavior
Policy type Fabric A Fabric B
Tolerant/Absent SCC;DCC Error message logged.
Run
fddCfg --fabwideset
“<policy_ID>”
from any switch
with the desired configuration to fix
the conflict. The
secPolicyActivate
command
is blocked until conflict is resolved.
DCC
SCC;DCC
SCC
DCC SCC