I create a new instance. Happens for both Amazon Linux or Ubuntu instances. I didn't try a windows instance.
Sometimes, I can log in once via ssh(putty). I do some
cd .. and
ls commands but that's it. I then get 'Software caused connection to Abort' from Putty. Future attempts at connection to the instance result in a "Connection timeout error".
I tried connecting with my Windows 10 Desktop, iMac and my Win10 Laptop (same router). My security group allows ssh (I tried allowing everything). Reboot the instance doesn't help.
I don't know how access Aws instances without ssh. Thanks.
I found some threads from 2011 with a similar issue
EDIT 2: Issue solved
Long story short: My account a long time ago was suspended (and unknowingly put into "isolation"). Then I got my account reactivated. Account Support said it was a technical issue. I paid for Tech Support for 2 months, Tech Support realized this was an account issue. I received a refund and $100 in AWS credits.