NAME

udp-echo-server — Simple UDP Echo Server

SYNOPSIS

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 listening 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).

-v | --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 sequences 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).

-P port | --from-port port

Sets the first local port of a range (default: 7).

-P port | --to-port port

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

-h | --help

Prints command help.

--version

Prints program version.

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

 

AUTHORS

Thomas Dreibholz
https://www.nntb.no/~dreibh/hipercontracer
mailto://dreibh@simula.no