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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Tomcat - Shutdown port

On a new installation of Tomcat (default config files), you'll notice that your server.xml file is set up with a shutdown port of 8005, and shutdown="SHUTDOWN". What does this mean?

It means that anyone who contacts the server locally on port 8005 and send it the words SHUTDOWN can cause Tomcat to close out all its web applications and shut down cleanly. Yikes - is this a security hole of what? It could be. Fortunatly , you'll notice that I said it's a LOCAL connection to the port that causes a shutdown, so it no-one can ssh or telnet in, nor log in from the keyboard unless they're an admin, it might not be a problem ....

If your Tomcat server allows anyone except the administrator to log in with a shell, then I strongly suggest you change shutdown="SHUTDOWN" to shutdown="waSS-I41tis" so that at least it won't be a string that any hacker can guess. You might like to change the port number too. Alas, it would be unwise to disable the facility completely, since catalina.sh and shutdown.sh use the port (details read from the config file) as part of their processing. At least server.xml is neither group nor world readable.

waSS-I41tis => "what a STUPID SYSTEM - I for one think it's silly"
(written 2006-08-18)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A654 - Web Application Deployment - Configuring and Controlling Tomcat
  [907] Browser -> httpd -> Tomcat -> MySQL. Restarting. - (2006-10-28)
  [914] A practical example of roles - (2006-11-04)
  [1351] Compressing web pages sent out from server. Is it worth it? - (2007-09-14)
  [1370] Apache Tomcat Performance Tuning - (2007-09-29)
  [1503] Web page (http) error status 405 - (2008-01-12)
  [1553] Automatic startup and shutdown of Tomcat - (2008-02-24)
  [1762] WEB-INF (Tomcat) and .htaccess (httpd) - (2008-08-20)
  [1943] Port and Glasses - (2008-12-14)
  [1994] tomcat-users.xml; what a difference a space made - (2009-01-16)
  [2039] The Invoker - (2009-02-13)
  [2061] Tomcat 6 - Annotated Sample Configuration Files - (2009-03-01)
  [2163] CATALINA_OPTS v JAVA_OPTS - What is the difference? - (2009-05-09)
  [2652] Reading and writing cookies in Java Servlets and JSPs - (2010-02-26)
  [3043] Gathering information - logging - with log4j. First steps. - (2010-11-12)

A652 - Web Application Deployment - Tomcat -Sourcing, Installing and Initial Testing
  [1049] Java 6, Apache Tomcat 6. - (2007-01-21)
  [1550] Java (JSP and Servlet examples) live on our server - (2008-02-23)
  [2088] Changing the 404 - file not found - page in Tomcat - (2009-03-18)
  [3819] Packing a tar, jar or war file - best practise - (2012-07-26)


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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.

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