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udp-echo-server(1)	     General Commands Manual	      udp-echo-server(1)

NAME
     udp-echo-server -- Simple UDP Echo Server

SYNOPSIS
     udp-echo-server [-L level | --loglevel level]
		     [-Z on|off | --logcolor on|off]
		     [-O file | --logfile file]
		     [-q | --quiet] [-w | --verbose]
		     [-U user|uid | --user user|uid]
		     [-A address | --address address]
		     [-P port | --port port]
		     [-f port | --from-port port] [-t port | --to-port port]
     udp-echo-server [-h | --help]
     udp-echo-server [-v | --version]

DESCRIPTION
     udp-echo-server is a simple UDP Echo server. It can be used as endpoint for
     HiPerConTracer   UDP   Ping/Traceroute.	Note,	for   security	reasons,
     udp-echo-server only responds to source ports >= 1024, to avoid  using  the
     server in attacks, like spoofing a packet from another Echo server (port 7)
     to  create a flooding loop. Also, packets from the same port as the listen-
     ing port are ignored.

ARGUMENTS
     The following arguments may be provided:

     -L level | --loglevel level
	     Sets the minimum logging level  to  the  provided	value:	0=trace,
	     1=debug, 2=info, 3=warning, 4=error, 5=fatal.

     -q | --quiet
	     Sets the minimum logging level to 3 (warning).

     -w | --verbose
	     Sets the minimum logging level to 0 (trace).

     -Z on|off | --logcolor on|off
	     Enables  (on)  or disables (off) the usage of ANSI color escape se-
	     quences to colorise the log output according to its level.

     -O file | --logfile file
	     Sets a file name for appending the log output to. If a file is set,
	     no log output is made to the console.  Otherwise,	all  log  output
	     will be written to the console.

     -U user|uid | --user user|uid
	     After  startup,  the  server uses UID and GID of the given user (by
	     name or GID).

     -A address | --address address
	     Sets the local address (default: ::).

     -P port | --port port
	     Sets the local port (default: 7).

     -f port | --from-port port
	     Sets the first local port of a range (default: 7).

     -t port | --to-port port
	     Sets the last local port of a range (default: 0; 0 uses the  "from"
	     port).

     -h | --help
	     Prints command help.

     -v | --version
	     Prints program version.

EXIT STATUS
     The  udp-echo-server tool exits with 0 on success, and >0 in case of an er-
     ror.

EXAMPLES
     udp-echo-server

     udp-echo-server --address 192.168.1.1 --port 7777

     udp-echo-server --address 3ffe::1:2:3 --port 7777

     udp-echo-server --address :: --user nornetpp

     udp-echo-server --address 3ffe::1:2:3 --from-port 10000 --to-port 10999

     udp-echo-server --version

     udp-echo-server -h

NOTES
     This program is part of HiPerConTracer. The  latest  version  of  HiPerCon-
     Tracer  can be found on the HiPerConTracer Homepage at HiPerConTracer Home-
     page.

AUTHORS
     Thomas Dreibholz, Homepage

udp-echo-server 		  May 26, 2026		      udp-echo-server(1)
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