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Last pushed: 8 months ago
Short Description
Send copies of (UDP) datagrams to multiple receivers, with optional sampling and spoofing
Full Description


These are base docker images that include samplicator.


A generic UDP proxy/duplicator. Forwards UDP requests to defined hosts. I am currently using this as an SNMP trap proxy. For a working example, run:

docker run -d --name trap_sink weldpua2008/net-snmp
export TRAPSINK=`docker inspect -f '{{ .NetworkSettings.IPAddress }}' trap_sink`
docker run -d --name trap_dest weldpua2008/net-snmp
export TRAPDEST=`docker inspect -f '{{ .NetworkSettings.IPAddress }}' trap_dest`
docker run -d --name trap_proxy weldpua2008/samplicator -d 3 -p 162 -S $TRAPSINK/162 $TRAPDEST/162
export TRAP_PROXY=`docker inspect -f '{{ .NetworkSettings.IPAddress }}' trap_proxy`
docker run --rm=true weldpua2008/net-snmp snmptrap -v 1 -c public $TRAP_PROXY . "" 0 0 coldStart.0

This will start 2 trap receivers (trap_sink is a local logging receiver and trap_dest is the real receiver) and send a coldStart trap to the proxy. Since debugging is turned on, you'll be able to see the packet come through the proxy (using docker logs trap_proxy). Then you can examine /trap.log on the receivers to see the content (using docker-enter it would be docker-enter trap_sink cat trap.log)

Project Source


To see this help on the CLI: docker run --rm=true weldpua2008/samplicator -h

This is samplicate, version 1.3.7-beta6.
Usage: samplicate [option...] receiver...

Supported options:

  -p <port>                UDP port to accept flows on (default 2000)
  -s <address>             Interface address to accept flows on (default any)
  -d <level>               debug level
  -b <size>                set socket buffer size (default 65536)
  -n               don't compute UDP checksum (leave at 0)
  -S                       maintain (spoof) source addresses
  -x <delay>               transmit delay in microseconds
  -c configfile            specify a config file to read
  -f                       fork program into background
  -V                       print program version and exit
  -h                       print this usage message and exit

Specifying receivers:

  A.B.C.D                  is the receiver's IP address
  port                     is the UDP port to send to (default 2000)
  freq                     is the sampling rate (default 1)
  ttl                      is the sending packets TTL value (default 64)

Config file format:

  a.b.c.d[/e.f.g.h]: receiver ...
  a.b.c.d                  is the senders IP address
  e.f.g.h                  is a mask to apply to the sender (default
  receiver                 see above.

Receivers specified on the command line will get all packets, those
specified in the config-file will get only packets with a matching source.


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This is currently a work in progress, I am not responsible and shall not
be held responsible in any manner if this tool causes loss of data, hardware
faults, act of gods, invocation of old or ancient ones, elder gods and other
horrors from the depths.


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