Monico CDL, Инструкция по установке и эксплуатации

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6.1.1.1 Setting Properties

The Enable Web Server property is used to enable or disable the web server. By default, this
property is enabled and the Gateway will wait for incoming requests and then fulfill the requests as
required. If the server is disabled, connections to this port will be refused. Remember that in order
for the server to operate; a TCP/IP connection must be configured using the Communications
category.

The Listen on Port property indicates the TCP port number the web server will listen on. Port 80 is
the default port used by the HTTP protocol and will most likely suit your application.

The Remote Control property is used to enable or disable an option by which the remote viewing
facility is extended to allow a web browser to be used to simulate the pressing of keys or display
primitives, thereby allowing remote control of the panel or the machine it controls. While this
feature is extremely useful, care must be taken to use the various security parameters to avoid
unauthorized tampering with a machine. The use of an external firewall is also strongly
recommended if the panel is reachable from the Internet.

The Remote Refresh property represents the frequency at which the web browser connected to
the web server will refresh the remote view page. A value of zero will result in refreshes being
performed as quickly as possible. Higher values will reduce bandwidth usage, and may be suitable
for modem connections.
6.1.1.2 Security Properties

The IP Restrictions group is used to restrict web server access to hosts whose IP address matches
the mask and data indicated. All access may be restricted, or the filter may be used to restrict just
the remote control or data editing facilities.

The Authentication group defines whether users connecting to the web server will be required to
provide username and password information, and how that information will be validated. The
Method defines the algorithm to be used, with Digest being the recommended choice. The Source
property is used to indicate whether you will enter the required username and password directly
into the web server properties, or whether you will create users within MonicoView II’s security
system and grant them access to the web server.
6.1.2 Using the Security System
MonicoView II contains powerful features that allow you to define which operators have access to which
display pages, and limit those operators able to make changes to specific data. The software also contains
a security logging facility that can be used to record changes to data values indicating when the change
occurred and by whom it was performed.
6.1.2.1 Security Basics
The follow sections detail some of the basic concepts used by the security system.
6.1.2.2 Object-Based Security
MonicoView II’s security system is object-based. This means that security characteristics are applied to a
display page or to a tag, and not to the user interface element that accesses the page or makes a change to
the tag. The alternative subject-based approach typically means that you have to be careful to apply
security settings to every single user interface element that might change restricted data. MonicoView II’s
approach avoids this duplication and ensures that once you have decided to protect a tag, it will remain
protected throughout your database.