Network Tester was written to test IPSEC tunnels by downloading 100mb of data and logging the progress. It runs both as a client and as a server depending on how it's started. I've tried to expand this a bit. The first thing I normally do is setup the server portion. For this you can run from the command line:

networkTester -s

Optionally you can specify:

-p <port number> (default 8888)
-L <log File>
-b <size in mb> 

The -b switch sets the packet size to send, by default it's 100mb so on slower networks you might want to scale that down a bit to 50mb or 10mb:

networkTester -s -p 8080 -b 10 -L /tmp/networkTest.log

NetworkTest will not daemonize so if you want to fire and forget and leave it running:

nohup networkTester -s -p 8080 -b 10 -L /tmp/networkTest.log &

At this point you could use a web server and hit the networkTest test page from the command line it would look like this:

curl http://[networkTester IP]/
HTTP 1.1/ 200 OK
Date: 1/10/2015 09:36:51pm
From: 172.16.1.45:57327
To: docker02 - :8888

To start the client you can run networkTest as follows:

networkTester -c -a <networkTester server IP>

That will try to connect to the server on port 8888, Optionally you can specify:

-p <port number> Default is 8888
-L <log file>
-t <timeout in seconds>

So to connect to the server example above:

networkTester -c -a 10.100.1.15 -p 8080 

Program will output the following:

Client side:
	2015/01/10 16:37:36 Connected to 10.100.1.15 on port 8888
	2015/01/10 16:38:18 200 OK, downloaded 100.00m in 42.33s, 18.90Mbps
	2015/01/10 16:38:18 Connected to 10.100.1.15 on port 8888
	2015/01/10 16:40:00 200 OK, downloaded 100.00m in 42.23s, 18.90Mbps

Server /tmp/networkTest.log:
	2015/01/10 21:37:20 Connect From: 172.16.1.45:57346, to: 10.100.1.15:8888
	2015/01/10 21:38:03 Sent: 100.00m From: 10.100.1.15:8888 to 172.16.1.45:57346 in 42.10s 19.00Mbps
	2015/01/10 21:38:03 Connect From: 172.16.1.45:57363, to: 10.100.1.15:8888
	2015/01/10 21:38:45 Sent: 100.00m From: 10.100.1.15:8888 to 172.16.1.45:57346 in 42.10s 19.00Mbps

Again the program doesn't daemonize so if you want to fire and forget to leave it running in the background:

nohup networkTester -c -a 10.100.1.15 -p 8080 -L /tmp/networkTest.log &

For some odd reason I needed the ability to generate HTML data for a database functionality so networkTester also has the ability of spitting out random HTML by accessing the url: http://[networkTest IP]/dbgen

Data Testing docker02

1/10/2015 10:10:57pm, HTTP 1.1/ 200 OK
First Name	Last Name	Sold Today
RAYMOND	ADAMS	85.36
FRANK	WRIGHT	30.32
...
HARRIS	14.46
ANDREW	GREEN	84.88
ERIC	HILL	82.77