You can ping, traceroute and mtr this server: probe.rz.ctrl-s.de. We also have an iperf3 server running on port 65535. You can also download these files for speed tests from this location:
Use these examples if you have difficulties diagnosing the network or Internet connection to the ctrl-s GmbH data centre.
Windows: ping probe.rz.ctrl-s.de
Linux: ping -c 4 probe.rz.ctrl-s.de
mtr -4 -b -w -c 15 probe.rz.ctrl-s.de
This command will make 15 requests per hop and should take about 15 seconds. The report will be generated after all queries have been made. Replace 15 with another number to change how long you want to run the measurement.
Measure tcp/ip download speed: iperf3 -c probe.rz.ctrl-s.de --port 65535 --reverse
Measure tcp/ip upload speed: iperf3 -c probe.rz.ctrl-s.de --port 65535
Measure udp/ip download speed: iperf3 -c probe.rz.ctrl-s.de --port 65535 --reverse --udp --bitrate 3M
Measure udp/ip upload speed: iperf3 -c probe.rz.ctrl-s.de --port 65535 --udp --bitrate 3M
When measuring udp/ip, you need to test the capacity of the line. You need to replace the argument of the --bitrate parameter with the speed you want to test (in this example 3M means 3Mbps). As udp/ip doesn't support any kind of flow control, the iperf3 server or client doesn't know how many udp packets to generate. That's why you need to specify the line speed (how many packets to generate).
Please be careful with the --bitrate setting, as you may flood your own network, as probe.rz.ctrl-s.de is connected on a 20Gbps line.
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- Matthias Lukaseder