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Full Discussion: Changing SNMP port number
Top Forums UNIX for Dummies Questions & Answers Changing SNMP port number Post 32259 by Perderabo on Thursday 21st of November 2002 09:15:30 AM
Old 11-21-2002
Re: /etc/services is not used to configure ports.
Quote:
Originally posted by Neo
/etc/services is not (generally) used to change ports.
Well, I must say that that with the versions of unix that I am familiar with, /etc/services does indeed control which ports a program will use.

To verify that this is still true I signed in to a Solaris 8 and a HP-UX 11 system. I did a "telnet localhost" and verified that I got a telnet session. Then I changed /etc/services so that the telnet entry said 21/tcp rather than 23/tcp. Then I repeated the "telnet localhost" test. In both cases I was now talking to a ftp server.

Yes, the telnet program does offer the user a way to override the default port on the command line. But even there, an /etc/services search is performed if the port is non-numeric. That's why "telnet localhost 25" and "telnet localhost smtp" both work.

Doesn't your unix system behave the same way?
 

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LEARN ABOUT DEBIAN

vdetelweb

VDETELWEB(1)						      General Commands Manual						      VDETELWEB(1)

NAME

       vdetelweb - Virtual Distributed Ethernet Telnet and/or Web management module

SYNOPSIS

       vdetelweb [ --web ] [ --telnet ] [ --nodename nodename ] [ --daemon ] [ --rcfile rcfile ] mgmt_socket

DESCRIPTION

       vdetelweb implements a tiny telnet server and/or a tiny web server for the remote management of a VDE2 switch.

OPTIONS

       -w, --web
	      start the web server. At least one of --web or --telnet must be set.

       -t, --telnet
	      start the telnet server. At least one of --web or --telnet must be set.

       -n, --nodename nodename
	      specify  the  nodename as seen from remote connections (e.g. in the command prompt or in the web page title). uname nodename is used
	      when this option is not specified.

       -d, --daemon
	      run as a daemon, using syslog for logging.

       -f, --rcfile rcfile
	      rc file to set the initial switch configuration.	When not specified, vdetelweb searches for ~/.vde/vdetelwebrc and /etc/vde/vdetel-
	      webrc. At leas one rc file must exist and be readable.

       -h, --help
	      print help. please use it for a more complete list of options.

       mgmt_socket
	      is  the  managemnt  socket  used to communicate with the vde_switch.  (This option must match the path used in the -M option for the
	      vde_switch).

NOTICE

       Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik  und  Informationstechnik"
       i.e. the German "Association for Electrical, Electronic & Information Technologies").

SEE ALSO

       vde_switch(1), vde_plug(1), vdeq(1).  dpipe(1).	unixterm(1).

AUTHOR

       VDE is a project by Renzo Davoli <renzo@cs.unibo.it>

Virtual Distributed Ethernet					   June 16, 2008						      VDETELWEB(1)
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