I have SSH root access to an EC2 instance but no access to the AWS Console / AWS KEY & SECRET.
My incoming traffic to this host on all TCP ports except 22 TCP seems to be blocked - I cannot access my services (for example
nginx on port 80) from the outside.
nmap shows these ports as
filtered, while port 22 is shown as open when SSH is running and
closed when SSH is temporarily shut down.
ICMP and UDP are also blocked.
nc and some other tools to check that.)
I know that my instance is in some custom, non-default EC2 Security Group named, let's say
my-security-group, but I don't know its rules.
How to list these rules with the access level I have got?
Update 1: My
iptables rules are empty - let's assume that I am sure that its the Security Group that is blocking my traffic.