dec-notes ? Post: 11297

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Top Forums UNIX for Dummies Questions & Answers dec-notes ? Post 11297 by Neo on Saturday 1st of December 2001 09:48:11 PM

12-01-2001

Administrator

BTW: Commenting out or in ports in /etc/services does not disallow or allow services. /etc/services is just a mapping between the friendly name and the port number. A daemon process can start and run without any reference in /etc/services if it opens the port based on port number.

If you call a service by name, then yes the mapping helps to find the port.... however this is not enabling a port, per se, just doing the port number to name mapping......

On another note....

Might be easier to just see if you can use a program like lsof to find out what process using the port.. then you can follow the trail to the parent processes to find out where the process is initiated.

Neo

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services

services(4)						     Kernel Interfaces Manual						       services(4)

NAME

       services - Defines the sockets and protocols used for Internet services

SYNOPSIS

       /etc/services

DESCRIPTION

       The  /etc/services  file associates Internet service names and aliases with the port number and protocol used by the service.  Each service
       is listed in this file on a single line of the form: ServiceName  PortNumber/ProtocolName  Aliases

       The fields contain the following information: The official Internet service name.  The socket port number used  for  the  service  and  the
       transport protocol used for the service.  A list of unofficial service names.

       Items on a line are separated by spaces or tabs.  Comments begin with a # (number sign) and continue to the end of the line.

EXAMPLES

       Entries	in  the  /etc/services	file for the inetd internal services might look like this: echo 	 7/tcp echo	     7/udp discard
       9/tcp	  sink null discard	  9/udp      sink null daytime	    13/tcp daytime	 13/udp  chargen       19/tcp	    ttytst  source
       chargen	    19/tcp	ttytst source ftp	   21/tcp time	       37/tcp	   timeserver time	   37/udp      timeserver

RELATED INFORMATION

       Functions: endservent(3), getservbyname(3), getservbyport(3), getservent(3), setservent(3)

       The RFC923 specification.  delim off

																       services(4)