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Full Discussion: Server dependencies
Top Forums UNIX for Dummies Questions & Answers Server dependencies Post 302650623 by frappa on Monday 4th of June 2012 03:50:59 AM
Old 06-04-2012
Hi,

sorry for not being too clear.

netstat can be used in order to look both for services provided by the monitored server and external services for which the server is acting as a client.
Actually netstat output reports both 'Local address' and 'Foreign address' columns: the former is for local network sockets, while the latter is for 'external' network sockets.
When I stated "[...]You could find services provided by the server itself[...]", I meant that you could discover services for which the server is acting both as a server and as a client (trivial case: think about SSHing to the server itself).

I also didn't mention that for UDP traffic for which the server acts as a client with respect to an external service provide, you may never see a corresponding row in netstat output, because UDP connections are stateless by design (for exceptions have a look at: networking - netstat -na : udp and state established? - Stack Overflow that is, netstat output will show UDP sockets just for services for which the server is actually acting as a server.
So, in order to see if an application is using DNS (implemented as a service listening on UDP port 53 on the server side) you'd better use a network traffic sniffing tool.

see ya
fra

Last edited by frappa; 06-04-2012 at 04:51 AM.. Reason: correcting some typos
 

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XSetPointerMapping(3X11)					     MIT X11R4						  XSetPointerMapping(3X11)

Name
       XSetPointerMapping, XGetPointerMapping - manipulate pointer settings

Syntax
       int XSetPointerMapping(display, map, nmap)
	  Display *display;
	  unsigned char map[];
	  int nmap;

       int XGetPointerMapping(display, map_return, nmap)
	  Display *display;
	  unsigned char map_return[];
	  int nmap;

Arguments
       display	 Specifies the connection to the X server.

       map	 Specifies the mapping list.

       map_return
		 Returns the mapping list.

       nmap	 Specifies the number of items in the mapping list.

Description
       The function sets the mapping of the pointer.  If it succeeds, the X server generates a event, and returns Element map[i] defines the logi-
       cal button number for the physical button i+1.  The length of the list must be the same as would return, or a error results.  A zero ele-
       ment disables a button, and elements are not restricted in value by the number of physical buttons.  However, no two elements can have the
       same nonzero value, or a error results.	If any of the buttons to be altered are logically in the down state, returns and the mapping is
       not changed.

       can generate a error.

       The function returns the current mapping of the pointer.  Pointer buttons are numbered starting from one.  returns the number of physical
       buttons actually on the pointer.  The nominal mapping for a pointer is map[i]=i+1.  The nmap argument specifies the length of the array
       where the pointer mapping is returned, and only the first nmap elements are returned in map_return.

Diagnostics
       Some numeric value falls outside the range of values accepted by the request.
		 Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument
		 defined as a set of alternatives can generate this error.

See Also
       XChangeKeyboardControl(3X11), XChangeKeyboardMapping(3X11)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

															  XSetPointerMapping(3X11)
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