For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.
Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!
I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Searching security holes
You'll see from my post earlier this morning that I've added some "Out and about in Wiltshire" pages to our shared data system
(Also known as a "wiki") on this site. And, I thought, "what better opportunity than to extend our site's search engine
to include the database of information in that system?"
But wait. Our shared data system includes not only "public editable" and "public facing" pages, but also pages that are marked "internal only" and are only readable by members of the Well House Consultants team. A search engine that would simply search the database for the desired term wouldn't be sufficient - the search system is another door (a back door) to the data and it needs to be (and has been) secured as appropriate.
Why am I posting this "tip"? Because it's something that authors of search facilities often overlook; I know of various web resources which aren't directly accessible to me, but which I can retrieve information from through search facilities without (or with poor) security. Often, I'll let the web site owner know they've got a problem if I find one of these ... but I do have the feeling that some folks aren't all that concerned about their security. Certainly the holes often remain. (written 2005-04-04, updated 2006-06-05)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articlesA163 - Web Application Deployment - Network Configuration and Security 
A bolt of lightning on Multicasting - (2004-08-11) 
Security and Safety - (2004-09-03) 
Looking up IP addresses - (2005-06-01) 
What are DHCP and DNS? - (2005-11-27) 
Domain Forwarding - 2 ways of doing it - (2005-11-29) 
Heartbeat script in Perl - (2007-02-09) 
Wireless hotel tips - FTP and Skype connections failing - (2007-10-26) 
Slow boot and terminal start on Linux boxes - (2008-06-05) 
As different as night and tyres - (2008-07-18) 
Ruby, Perl, Linux, MySQL - some training notes - (2008-11-23) 
How was my web site compromised? - (2009-02-24) 
Parallel Pinging, using Python Threads or Expect spawn lists - (2009-11-02) 
Checking all the systems on a subnet, using Expect and Tk - (2011-09-18) 
Setting up your MacBook Air as a mobile broadband router - (2013-07-07)
Some other Articles
Different course every dayNULL in MySQLFree parking for short errands in MelkshamInformation request forms, cleaning up spamSearching security holesA beautiful place to live and learnBusiness practise, 2005 style100% TrainingHarmonyA little bit of fun - the new Perl Quiz
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This is a page archived from The Horse's Mouth at
the diary and writings of Graham Ellis.
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