Susspect for BOTNET!

I suggest you stop doing what you're doing. Just because something is legal, does not make it right…or acceptable. Port scanning (IMHO) violates Article 4 of the the Linode Acceptable Use Policy (to which you agreed when you signed up).

-- sw

4.Vulnerability Testing. You shall not attempt to probe, scan, penetrate, or test the vulnerability of Linode or any Service, and shall not breach Linode security or authentication measures, whether by passive or intrusive techniques, without Linode's express written consent. If you are a Linode customer and need to perform a penetration test, let us know beforehand by emailing Support here.

i am not doing any vulnerability scan. port scan is not a vulnerability scan. port open check is not vulnerability or penetration test

I would disagree. If you are port scanning a host you do not know anything about then you are trying to discover which services are open on it.

This information should be available to you by asking the service owner etc you shouldn’t need to discover it.

The obvious, even if incorrect, conclusion that anyone would jump to is you are searching for open services.

If you scanned a couple of hosts perhaps ok, but if you’re scanning lots then I can’t think of any good reason to do that unless you are a security researcher.

As the terms said you should have, and still should, contact support and explain openly what you are doing and why. If you can’t do that then they would be right to treat you suspiciously - I would.

ok i understand. thank you

@dudulitrincs --

I agree with @hey… Port scanning other systems without the other owners' knowledge violates the acceptable use policy. However, if you are port scanning your own system looking for open doors, that's perfectly ok.

Maybe you just accidentally misconfigured your port scanner…

-- sw