> > > Rich Shepard <[email protected]> wrote on Thu, 8 Jan 15:03:56 > -0800 (PST) > > On Thu, 8 Jan 2015, Keith Lofstrom wrote: > > > Glad you are back ... I think ... fully appreciating Rich Shepard > requires > > peculiar tastes :-) > > Keith, > > Nice to know _someone_ appreciates me. :-) > > > Your firewall/router and modem/switch probably have optional settings > that > > can block incoming ports (which you probably do not use). My further > guess > > is that these settings are stored in EPROM, and expanded into live code > in > > faster RAM at device boot time. The code in RAM can be upset by static > > electricity, cosmic rays, evil gremlins, and probable for this time of > > year, power glitches. > > Ah, so. > > Also, excess RF, which can also temporarily derange the settings in consumer networking gear.
> > A deep power cycle ( more than 10 seconds should be plenty ) will restore > > the modem/router to status quo ante; a quick off/on may not clear the RAM > > or trigger a full reset. > > I always power cycle deeply. When the capacitors finish draining (the > electron pool on the desktop stops growing) and I know it's time to turn it > back on. > > An EE who worked for ITT told me once it takes at least eight secs for electrolytic caps to discharge after a powerdown, and powerup before that eight second interval results in early failure. Therefore, when I ask folks to do power cycles on PCs, I always ask them to wait at least eight seconds. However, sometimes, a longer delay is called for in resetting cable and DSL modems. Experience indicates a two minute power cycle allows the ISP to issue a new DHCP lease, and that also often solved problems with the consumer gear I was supporting. -- 73s/Best regards de John Bartley K7AAY CN85qj •|||||||• "By reading this message, you agree to the NSA terms of service." _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
