strange behaviour on linux

I’m noticing a strange behaviour runnin tests on linux. Apparently when I start gatling it takes ages (around a minute) to present me with the available simulations and when it start shows something like this :


It is actually an network issue.
By default gatling is configured to use Google Analytics and as warmup site.
Unfortunately my env doesn’t have access to the outside, thus it waits for the timeout before starting with the test.