Black Box ET0010A User Manual

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EncrypTight Component Connections
EncrypTight User Guide
27
This section describes the planning for the following connections: 
ETPM and ETKMS
 
on the Same Subnetwork
When the ETPM is located on the same subnetwork as the external ETKMS, the ETPM communicates 
with the ETKMS over the internal protected network using Ethernet connections as shown in 
.
Figure 7
ETPM and ETKMS located in the same subnetwork 
ETPM and ETKMS on Different Subnetworks
The ETPM and ETKMS interconnections on different subnetworks depends on the type of policy: Layer 
3 IP policy or Layer 2 Ethernet policy. 
ETPM and ETKMS in Layer 3 IP Policies
With larger IP networks, the ETPM and the external ETKMSs could be located on different subnetworks, 
as shown in 
. When managing the ETPM and ETKMS in-line, the communications path between 
the devices must pass through one or more PEPs and potentially one or more firewalls. For in-line 
management, in which management traffic can flow through the data path, be sure that the Enable 
passing TLS traffic in the clear
 feature is selected on all PEPs. Enable this feature from the ETEMS 
Appliance editor. By default, the Layer 3 PEPs are configured to pass all TLS traffic (port 443) in the 
clear. 
NOTE
The Enable passing TLS traffic in the clear feature passes all TLS traffic in the clear for all destination 
addresses. For added security, disable passing TLS traffic in the clear and create a policy for all TLS 
traffic (port 443) between EncrypTight components. For more information on creating policies, see 
.