Page 101 / 123 Scroll up to view Page 96 - 100
TW100-BRV304 User Guide
98
Windows 2000 Server Configuration
Configuration is the same as for
Example 2:
Windows 2000/XP Client to
except for specify-
ing the
Source
and
Destination
addresses for the "Filter Properties". Instead, for both IP Filters,
the
Filter Properties- Addressing
should be completed as follows.
Figure 83: Windows 2000 Server - Addressing
The
Source Address
should be set to "A specific IP Subnet", and the
IP address
and
Subnet mask
set to the address range used on the TW100-BRV304's LAN.
The
Destination Address
should be set to "A specific IP Subnet", and the
IP address
and
Subnet mask
set to the address range used on the Windows 2000 LAN.
Page 102 / 123
VPN
99
Using Certificates
Certificates are used to authenticate users. Certificates are issued to you by various CAs
(Certification Authorities). These Certificates are called "Self Certificates".
Each CA also issues a certificate to itself. This Certificate is required in order to validate
communication with the CA. These certificates are called "Trusted Certificates."
The
Certificates
screen lists both the Trusted Certificate - the certificates of each CA itself -
and Self Certificates - the certificates issued to you.
Figure 84: Certificates Screen
Subject Name
(CA)
The "Subject Name" is always the company or person to whom the
Certificate is issued. For trusted certificates, this will be a CA.
Issuer Name
The CA (Certification Authority) which issued the Certificate.
Expiry Time
The date on which the Certificate expires. You should renew the
Certificate before it expires.
Delete button
Use this button to delete a Trusted Certificate. Select the checkbox in
the
Delete
column for any Certificates you wish to delete, then click
the "Delete" button.
Name
The name you assigned to this Certificate. You should select a name
which helps to identify this particular certificate.
Subject Name
The company or person to whom the Certificate is issued.
Issuer Name
The CA (Certification Authority) which issued the Certificate.
Expiry Time
The date on which the Certificate expires. You should renew the
Certificate before it expires.
Delete button
Use this button to delete a Self Certificate. Select the checkbox in the
Delete
column for any Certificates you wish to delete, then click the
"Delete" button.
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TW100-BRV304 User Guide
100
Adding a Trusted Certificate
1.
After obtaining a new Certificate from the CA, you need to upload it to the TW100-
BRV304.
2.
On the "Certificates" screen, click the "Add Trusted Certificate" button to view the
Add
Trusted Certificate
screen, shown below.
Figure 85: Add Trusted Certificate
3.
Click the "Browse" button, and locate the certificate file on your PC
4.
Select the file. The name will appear in the "Certificate File" field.
5.
Click "Upload" to upload the certificate file to the TW100-BRV304.
6.
Click "Back" to return to the Trusted Certificate list. The new Certificate will appear in the
list.
Adding a Self Certificate
This process is different to obtaining a Trusted Certificate. The TW100-BRV304 must gener-
ate a request for the CA. You cannot request a Certificate directly. The correct procedure is as
follows:
1.
On the "Certificates" screen, click the "Add Self Certificate" button to view the first screen
of the
Add Self Certificate
procedure, shown below.
Figure 86: Add Self Certificate (1)
2.
Complete this screen.
Name
Enter a name which helps to identify this particular certifi-
cate. This name is only for your reference.
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VPN
101
Subject Name
This is the name which other organizations will see as the
Holder (owner) of this Certificate. This should be your
registered business name or official company name.
Gener-
ally, all Certificates should have the same value in the
Subject field.
Hash Algorithm
Select the desired option.
Signature Algorithm
Select the desired option. RSA is recommended.
Signature Key Length
Select the desired option. Normally, 1024 bits provides
adequate security.
3.
Click "Next" to continue to the following screen.
Figure 87: Add Self Certificate (2)
4.
Check that the data displayed in the
Certificate Details
section is correct. This data is used
to generate the Certificate request. If the data is not correct, click the "Back" button and
correct the previous screen.
5.
If the data is correct, copy the text in the
Data to supply to CA
panel to the clipboard.
6.
Apply for a Certificate:
Connect to the CA's web site.
Start the Self Certificate request procedure.
When prompted for the request data, copy this data (including "-----BEGIN
CERTIFICATE REQUEST-----" and "-----END CERTIFICATE REQUEST-----")
from this screen to the CA's form.
Submit the CA's form.
If there are no problems, the Certificate will then be issued.
7.
After obtaining a new Certificate, as described above, you need to upload it the TW100-
BRV304. Click the "Next" button to see the screen below.
Page 105 / 123
TW100-BRV304 User Guide
102
Figure 88: Add Self Certificate (3)
8.
Upload the Certificate:
Click the "Browse" button, and locate the certificate file on your PC
Select the file. The name will appear in the "Certificate File" field.
Click "Upload" to upload the certificate file to the TW100-BRV304.
Click "Finished" to return to the Certificate list. The new Certificate will appear in the
list.
CRLs
CRLs are only necessary if using Certificates.
CRL (Certificate Revocation List) files show Certificates which have been revoked, and are no
longer valid. Each CA issues their own CRLs.
It is VERY IMPORTANT to keep your CRLs up-to-date. You need to obtain the CRL for each
CA regularly. The "Next Update" field in the CRL shows when the next update will be avail-
able.
To add a New CRL
1.
Obtain the CRL file from your CA.
2.
Select
CRL
from the VPN menu. You will see a screen like the example below.
Figure 89: Certificate Revocation Lists
3.
Click the "Add New CRL" button. You will see a screen like the following:

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