How to remove this pipe plug


I'm trying to install my dishwhasher and I'm at the point where I need to install the drain hose.
However, the pipe is obstructed by this plug:


I guess this is the right pipe (please confirm).
I tried to remove it with pliers and screwdriver with hammer without any success.
How may I remove it?

Edit: Here's another picture:
enter image description here

Best Answer

It looks like a plug in a barbed fitting for hose with clamp attachment. When not being used, the drain is sealed by the plug.

I would apply heat to the barbed section causing it to expand slightly and loosen it's grip on the plug. A hair dryer might work, if not an electric heat gun set to LOW worked all the way around the barbed section for a few minutes then try turning it out again - and remember "righty-tighty, lefty-loosey".