Re: [[Infowarrior] - NSA Said to Have Used Heartbleed Bug for Years]
On 04/15/2014 09:56 AM, Matthew Black wrote: > From: Doug Barton [mailto:do...@dougbarton.us] >> When you say "clear the disk allocated to programs" what do you mean >> exactly? > > Seriously? When files are deleted, their sectors are simply released to the > free space pool without erasing their contents. Allocation of disk sectors > without clearing them gives users/programs access to file contents previously > stored by other users/programs. > > As to why this is a problem, well, as they write in some math textbooks, the > answer is trivial and left as an exercise to the reader. Well, usually > trivial. > > matthew black > california state university, long beach > > Bruce Schneier gave a plug for bleachbit - it does a reasonable job of trying to clean things up for you. > -Original Message- > From: Doug Barton [mailto:do...@dougbarton.us] > Sent: Monday, April 14, 2014 7:48 PM > To: nanog@nanog.org > Subject: Re: [[Infowarrior] - NSA Said to Have Used Heartbleed Bug for Years] > > On 04/14/2014 05:50 PM, John Levine wrote: >> In article <534c68f4@cox.net> you write: >>> On 4/14/2014 9:38 AM, Matthew Black wrote: >>>> Shouldn't a decent OS scrub RAM and disk sectors before allocating >>>> them to processes, unless that process enters processor privileged >>>> mode and sets a call flag? I recall digging through disk sectors on >>>> RSTS/E to look for passwords and other interesting stuff over 30 >>>> years ago. >>> >>> I have been out of the loop for quite a while but my strongly held >>> belief is that such scrubbing would be an enormous (and intolerable) >>> overhead ... >> >> It must be quite a while. Unix systems have routinely cleared the RAM >> and disk allocated to programs since the earliest days. > > When you say "clear the disk allocated to programs" what do you mean > exactly? > > > > > -- Glen Wiley KK4SFV
Re: Verizon's New Repair Method: Plastic Garbage Bags
Our neighborhood lost phone service when the pedestal at the end of the road was annihilated by a flail mowera WEEK AGO. The repair - orange plastic bag over the entrails of the pedestal. Yay Verizon - I finally understand why I send them so much money - stylish orange bags! On Mon, Aug 20, 2012 at 3:09 PM, Eric Wieling wrote: > For a while we have had a customer with some lines which go down every > time it rains. We put in the trouble ticket, a couple of days later > Verizon says the issue is resolved...until the next time it rains. > > The customer sent us some pictures today of the pole outside their office. > The repair appears to be wrapping some plastic bags around something up > on the pole. Here is link to the pictures the customer sent us, in case > anyone in the mood for a good scare. > > http://rock.nyigc.net/verizon/ > > > > -- Glen Wiley "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." - Antoine de Saint-Exupery
Re: DNS Reliability
Remember though that anycast only solves for availability in one layer of the system and it is not difficult to create a less available anycast presence if you do silly things with the way you manage your routes. A system is only as available as the least available layer in that system For example, if you use an automated system that changes your route advertisements and that system encounters a defect that breaks your announcements then although a well built anycast footprint might acheive 99.999, a poorly implemented management system that is less available and creates an outage would reduce the number. On Thu, Sep 12, 2013 at 4:25 PM, Phil Fagan wrote: > Its a good point about the anycast; 99.999% should be expected. > > > On Thu, Sep 12, 2013 at 2:14 PM, Beavis wrote: > > > I go with 99.999% given that you have a good number of DNS Servers > > (anycasted). > > > > > > On Thu, Sep 12, 2013 at 9:03 PM, Phil Fagan wrote: > > > >> Everything else remaining equal...is there a standard or expectation for > >> DNS reliability? > >> > >> 98% > >> 99% > >> 99.5% > >> 99.9% > >> 99.99% > >> 99.999% > >> > >> Measured in queries completed vs. queries lost. > >> > >> Whats the consensus? > >> > >> > >> -- > >> Phil Fagan > >> Denver, CO > >> 970-480-7618 > >> > > > > > > > > -- > > () ascii ribbon campaign - against html e-mail > > /\ www.asciiribbon.org - against proprietary attachments > > > > Disclaimer: > > http://goldmark.org/jeff/stupid-disclaimers/ > > > > > > -- > Phil Fagan > Denver, CO > 970-480-7618 > -- Glen Wiley KK4SFV "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." - Antoine de Saint-Exupery
