Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
 
20.9.2014 - We have just updated our course layouts and descriptions and added our 2015 schedule.

As different as night and tyres

Brugge at nightI was going to say "as different as night and day" - but they're really too similar! You'll be reading this forum post on our new server, and I'm already seeing a dramatic improvement in performance - partly related to the heavy load on the previous server, partly because the previous server wasn't specifically tuned to our specific requirements, and partly becauseMelksham is home of Cooper Tires it was physically located half a world away from us, which added in a lag time on each access no matter how fast and under loaded the network connection was. Map out the IP address that we're now using for www.wellho.net, and you'll be pointed to London, England!

Of course, we have grown to make extensive use of some very specific facilities over the years the site has been hosted in California - some of which were rushed in to short demonstrations which were intended to show a feature or facility rather to to be flexibly hosted, so a number of issued remain to be fixed over coming days, or finally transferred over the coming fortnight.


All sorts of issues with the upgrade (but no major software version issues - after all we do train people to be forward looking!) but I thought you might "enjoy" what is perhaps the most dramatic error message I can ever recall getting out of a Linux system:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The RSA host key for www.wellho.net has changed,
and the key for the according IP address 83.170.95.163
is unchanged. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
Offending key for IP in /Users/grahamellis/.ssh/known_hosts:29
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
9d:8b:2d:0f:b8:17:fd:b3:24:ce:34:ef:de:cb:77:37.
Please contact your system administrator.
Add correct host key in /Users/grahamellis/.ssh/known_hosts to get rid of this message.
Offending key in /Users/grahamellis/.ssh/known_hosts:1
RSA host key for www.wellho.net has changed and you have requested strict checking.
Host key verification failed.
earth-wind-and-fire:~


And what caused that? Well - it could have been paraphrased into:

You're in touch with a different machine to the last time you contacted www.wellho.net. Are you sure this is right? and of course, in the circumstances, I am sure ;-)

The solution? Either delete the offending line from the known_hosts file (that :1 in the message means that it's line number 1) or - as I did (but should not admit) just clear down the .ssh directory and reauthenticate all hosts next time you connect to them!
(written 2008-07-18, updated 2008-07-23)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A163 - Web Application Deployment - Network Configuration and Security
  [4134] Setting up your MacBook Air as a mobile broadband router - (2013-07-07)
  [3448] Checking all the systems on a subnet, using Expect and Tk - (2011-09-18)
  [2489] Parallel Pinging, using Python Threads or Expect spawn lists - (2009-11-02)
  [2052] How was my web site compromised? - (2009-02-24)
  [1904] Ruby, Perl, Linux, MySQL - some training notes - (2008-11-23)
  [1666] Slow boot and terminal start on Linux boxes - (2008-06-05)
  [1408] Wireless hotel tips - FTP and Skype connections failing - (2007-10-26)
  [1073] Heartbeat script in Perl - (2007-02-09)
  [511] Domain Forwarding - 2 ways of doing it - (2005-11-29)
  [506] What are DHCP and DNS? - (2005-11-27)
  [332] Looking up IP addresses - (2005-06-01)
  [267] Searching security holes - (2005-04-04)
  [37] Security and Safety - (2004-09-03)
  [11] A bolt of lightning on Multicasting - (2004-08-11)


Back to
Rapid growth leads to server move
Previous and next
or
Horse's mouth home
Forward to
Ways to accept credit cards - or not!
Some other Articles
Larger applications in PHP
Pictures from South Hampshire
Hillier Gardens, Hampshire
Ways to accept credit cards - or not!
As different as night and tyres
Rapid growth leads to server move
At the Westbury Bypass Enquiry
There is more that one way - Perl
A Train Service Update for Melksham Party in the Park
Configuring Apache httpd
4289 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86 at 50 posts per page


This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2014: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 899360 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/1712_As- ... tyres.html • PAGE BUILT: Thu Sep 18 15:30:25 2014 • BUILD SYSTEM: WomanWithCat