Hi & a warm welcome to the forums! 🙂
en0, en1 etc are BSD names for the ports...
http://www.macosxhints.com/article.php?story=20051020014120761
Generally named as they are initiated on startup, 1st en0 is normally Ethernet, en1 normally Airport, but some computers will have more ethernet Ports end Airport moved up to en2, en3 etc..
Those look like
attempts to get in, most likely means you don't have a router and are connected to a Modem and have an outside IP. I see 1000s a day even on dialup. It can also be inside your own network... depending on the IP, for instance TiVo can use port 2190.
You can put those IP numbers in Network Utility>Lookup tab and see if what they belong to.