Manuals / APC / Computer Equipment / Power Supply

APC UPS control system manual Credits, Security Issues

Models: UPS control system

1 233
Download 233 pages 42.59 Kb
Page 84
Image 84

Credits:

Many thanks go to Russell Kroll <rkroll at exploits.org> who wrote the CGI programs to work with his UPS Monitoring system named Network UPS Tools (NUT). Thanks also to Jonathan Benson <jbenson at technologist.com> for initially adapting the upsstatus.cgi program to work with apcupsd.

We have enhanced the bar graph program and hope that our changes can be useful to the original author in his project.

Security Issues:

•apcupsd runs as root.

•If you have NETSERVER ON in your apcupsd.conf file (which is the deault), be aware that anyone on the network can read the status of your UPS. This may or may not pose a problem. If you don’t consider this information privileged, as is the case for me, there is little risk. In addition, if you have a firewall between your servers and the Internet, crackers will not have access to your UPS information. Additionally, you can restrict who can access your apcupsd server by using inted to run the sservice and using access control lists with a TCP wrapper or by configuring TCP wrappers in apcupsd (see below for TCP Wrapper details).

•If you are running master/slave networking with a single UPS powering multiple machines, be aware that it is possible for someone to simulate the master and send a shutdown request to your slaves. The slaves do check that the network address of the machine claiming to be the master is that same as the address returned by DNS corresponding to the name of the master as specified in your configuration file.

Wrappers

As of apcupsd version 3.8.2, TCP Wrappers are implemented if you turn them on when configuring (./configure --with-libwrap). With this code enabled, you may control who may access your apcupsd via TCP connections (the Network Information Server, and the Master/Slave code). This control is done by modifying the file: /etc/hosts.allow. This code is implemented but untested. If you use it, please send us some feedback.

83

Page 83 Page 85
Page 84
Image 84
APC UPS control system manual Credits, Security Issues
Page 83 Page 85

UPS control system specifications

APC UPS (Uninterruptible Power Supply) control systems are vital components for ensuring uninterrupted power supply and protecting critical equipment from power interruptions, surges, or fluctuations. Designed by Schneider Electric, APC UPS systems are renowned for their high quality and reliability. They utilize advanced technologies and features to suit diverse applications, from home offices to large industrial settings.

One of the main features of APC UPS systems is the ability to provide backup power during outages. This is achieved through a battery system that activates immediately when the mains power fails. This seamless transition minimizes downtime and ensures that electronic devices continue to operate, protecting data integrity and equipment lifespan.

Another significant characteristic of APC UPS systems is their intelligent management capabilities. Most models come with PowerChute software, which provides users with real-time monitoring of power conditions and the status of the UPS. This software allows for graceful shutdowns of connected devices during extended outages, thereby preventing data loss and damage to devices.

APC UPS systems also incorporate advanced technologies such as Automatic Voltage Regulation (AVR). AVR technology ensures that the output voltage remains stable by correcting minor fluctuations without switching to battery mode. This not only prolongs the battery life but also provides a consistent power supply to the connected equipment.

Thermal management is another critical aspect of APC UPS control systems. The design often includes efficient cooling systems that prevent overheating, ensuring optimal performance and longevity of the unit. Some models feature EcoMode, which reduces energy consumption and lowers operational costs by working at high efficiency only when battery backup is not required.

APC UPS systems are designed with scalability in mind. Users can easily add more batteries or connect additional UPS units to accommodate growing power needs. Features such as hot-swappable batteries and modular design facilitate easy upgrades and servicing without interrupting power supply.

In terms of connectivity, APC UPS products often feature multiple options including USB, RS-232, and network management capabilities. This enables users to connect remote management tools and integrate the UPS with existing IT infrastructure.

In summary, APC UPS control systems deliver reliability, efficiency, and advanced technology features that cater to a wide array of power protection needs, making them a trusted choice for individuals and businesses alike.