I have a Debian virtual machine that is accessible from the internet by ports 80 TCP (Apache2), 22 TCP (OpenSSH), and 53 UDP TCP (Bind9), the problem is that Bind9 doesn't respond to queries from the internet but just those from the internal home network, whether the remote machine is connected to Wi-Fi or cable.
A portscan performed by a website shows not only the properly opened ports but also includes versions of the services and that's only possible by requesting data from each port so this leads me to think that it's not a network configuration problem but a Bind9 problem.
The following command works from any machine connected to my local home network but not from a remote machine or website
Please, I appreciate your help.
A portscan performed by a website shows not only the properly opened ports but also includes versions of the services and that's only possible by requesting data from each port so this leads me to think that it's not a network configuration problem but a Bind9 problem.
The following command works from any machine connected to my local home network but not from a remote machine or website
Please, I appreciate your help.
