Is there a firewall in front of the floating IP's?

Hi,

I was wondering if there is a firewall or something active in front of the floating IP’s.

I’m asking this because i am unable to connect to the floating IP on a specific port. The DNS server that is running behind the floating IP does work, as in i can dig DNS records from the floating IP.

When opening the floating IP in the browser with the specified Port it get, or a ERR_EMPTY_RESPONSE or a connection reset.