Remote desktop connection stops working

Hi,

I have 2 EC2 Windows instances running for months and now I cannot connect using Remote desktop. It seens only ports 80 and 443 are still ok. Other ports I used like RDP(3389), MySQL(3306), Firebird(3050) etc. are not acessible anymore. I tried to create a complete new instance, with new security group and still can't connect with RDP.

Anyone know what could have changed so No instance allows RDP connection anymore?

Thanks.

Govind Kumar EXPERTO
hace un año
Is your server residing in Public Subnet with IGW attached to it?
Amocki
hace un año
Yes. I'm always been able to access any service from any computer on internet. But now, suddenly, I cant connect with RDP (3389) or connect to Mysql (3306). IIS web Server works (ports 80 and 443). I didnt change anything. It just stops working. Newly created instances can't be accessed too.