On small sites, we have servers (linux rh 8, 9, or fc 4) acting as > internet routers, with a lan on one nic and an ethernet dsl modem on > another nic. > Sometimes the internet connection is lost and there no way to get it > back but to reset the modem (even rebooting the server doesn't make it, > it's really a modem frozen problem) > Instead of paying somebody to drive there and pull the AC plug from the > socket then push it in again, I decided to find some Remote Power > Control device which could allow the server to do that by itself when it > decides the modem is frozen. > I found some sort of such devices on the net : > - iBoot : http://www.connectworld.net/data_center/remote_reboot.HTM > - Sentry : > http://www.servertech.com/products/RemotePowerManagement/SentryIPM-2/ > - Sensatronics : http://www.openxtra.co.uk/product.php/34/1/ > - Adder : http://www.adder.com/main.asp?id=508_2075_23632&mode=Description > > Basically they seem to fit my needs, there are some important > requirements though : > - the device must handle 220V/50Hz AC > - the device must be able to be connected to the linux server, either > via ethernet ip, serial rs232 or usb and handled by it > - the device must accept commands via linux script (being as simple as > some "echo value > /dev/ttySx" or as complex as some "wget > http://device-ip-address/cgi/power?state=on";) and must not require a > browser with a java applet or whatever that can't be scripted > > I'd appreciate any advice and experience about such solutions, or other > for those who had addressed the same problem in a different way Here are some really old notes to something I did a few years ago: http://www.digitalhermit.com/linux/dsl_reboot.html It uses X10 devices available at Radio Shack and elsewhere to reboot a hung modem. This is 110V stuff, but 220V may be available. -- * The Digital Hermit http://www.digitalhermit.com * Unix and Linux Solutions kwan@xxxxxxxxxxxxxxxxx
