Need help understanding strange traffic...

Complete rookie would appreciate some edification…

My droplet was up for little more than a couple of hours and I was seeing some strange traffic in the logs:

IP		        Request							Status	Size	CONNECT HTTP/1.1	200		12364	CONNECT HTTP/1.1	200		12364	CONNECT HTTP/1.1		200		12364	CONNECT HTTP/1.1	200	        12364

Can someone explain why these requests were successful? What 12k was served?

Should I be worried (do I need to take action?) I already blocked IP in .htaccess

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This does not look like a standard apache log format. The full logs (unless the configuration has been altered) would be found in /var/log/apache2/access.log and will include the request made (that path or page requested by the client). Since these requests resulted in a 200 status they were for endpoints that exist on your droplet, possibly simply for /. There is not enough information here to know if these were malicious requests but anytime you launch a server on the public Internet it will receive unwanted requests. There are plenty of bots set up to scan large blocks of IP addresses for vulnerable servers.