Field
Description
Enable or disable User must change password.
The function is enabled with
7+
.
The function is disabled by default.
Access Level
Use Add to assign at least one access profile to the user. Se-
lecting Read-only specifies that the user can view the paramet-
ers of the access profile, but not change them. Selecting Read-
only is only possible if the option Switch to SNMP Browser in
the menu Access Profiles is not enabled.
If the option Switch to SNMP Browser is enabled, a warning
message displays because the user can switch to the SNMP
browser view, access the parameters and make any changes
they like. The option Read-only is not available in the SNMP
browser view.
If intersecting access profiles are assigned to a user, read and
write have a higher priority than Read-only. Buttons cannot be
set to the setting Read-only.
7.7 Certificates
An asymmetric cryptosystem is used to encrypt data to be transported in a network, to gen-
erate or check digital signatures and the authenticate users. A key pair consisting of a pub-
lic key and a private key is used to encrypt and decrypt the data.
For encryption the sender requires the public key of the recipient. The recipient decrypts
the data using his private key. To ensure that the public key is the real key of the recipient
and is not a forgery, a so-called digital certificate is required.
This confirms the authenticity and the owner of a public key. It is similar to an official pass-
port in that it confirms that the holder of the passport has certain characteristics, such as
gender and age, and that the signature on the passport is authentic. As there is more than
one certificate issuer, e.g. the passport office for a passport, and as such certificates can
be issued by several different issuers and in varying qualities, the trustworthiness of the is-
suer is extremely important. The quality of a certificate is regulated by the German Signa-
ture Act or respective EU Directives.
Certification authorities that issue so-called qualified certificates are organised in a hier-
archy with the Federal Network Agency as the higher certifying authority. The structure and
content of a certificate are stipulated by the standard used. X.509 is the most important and
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7 System Management
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