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Steelhead Appliance Installation and Configuration Guide
Installing and Configuring the Steelhead Appliance
Disabling SMB Signing
The following table lists the complete matrix for SMB registry parameters that ensure full optimization (that
is, bandwidth and latency optimization) using the Steelhead appliance.
Note:
Rows with an asterisk (*) and a plus sign (+) are illegal combinations of SSReq and SSen on the server and the
workstation respectively.
This table represents behavior for Windows 2000 workstations and servers with service pack 3 and Critical
Fix Q329170. Prior to the critical fix, the security signature feature was not enabled or enforced even on
domain controllers.
There are two sets of these parameters on each computer: one set for the computer as a server and the other
set for the computer as a client.
Important:
You must disable SMB signing for all Domain Controllers in the Active Directory if the Domain Controller
is also a file server and if you want the CIFS protocol blade to accelerate access.
Note:
On the client, if SMB signing is set to required, do not disable it on the server. For the best performance it should
be enabled on the clients, disabled on file servers, and enabled on domain controllers.
Number
Parameters on
Workstation
Parameters on
Server
Result
SSReq
SSEn
SSReq
SSEn
1
OFF
OFF
OFF
OFF
Signature Disabled: Steelhead full optimization
2
OFF
OFF
OFF
ON
Signature Disabled: Steelhead full optimization
3
OFF
OFF
ON
ON
Cannot establish session
4*
OFF
OFF
OFF
ON
Cannot establish session
5
OFF
ON
OFF
OFF
Signature Disabled: Steelhead full optimization
6
OFF
ON
OFF
ON
Signature Enabled; Steelhead bandwidth optimization
7
OFF
ON
ON
ON
Signature Enabled; Steelhead bandwidth optimization
8*
OFF
ON
OFF
ON
Signature Enabled; Steelhead bandwidth optimization
9
ON
ON
OFF
OFF
Cannot establish session
10*
ON
ON
OFF
ON
Signature Enabled; Steelhead bandwidth optimization
11
ON
ON
ON
ON
Signature Enabled; Steelhead bandwidth optimization
12
ON
ON
OFF
ON
Signature Enabled; Steelhead bandwidth optimization
13+
ON
OFF
OFF
OFF
Cannot establish session
14+
ON
OFF
OFF
ON
Signature Enabled; Steelhead bandwidth optimization
15+
ON
OFF
ON
ON
Signature Enabled; Steelhead bandwidth optimization
16+
ON
OFF
OFF
ON
Signature Enabled; Steelhead bandwidth optimization