@JB701 Absolutely agreed. Ports below 1024 generally should be well shielded. That's why they are called reserved ports as they serve crucial well known and designated services.
But port SMTP 25 is also open on Airtel dynamic IP in a DMZ setup. I am not using the firewall on the ZTE router. Instead I am blocking all the not required ports via the firewall on my linux gateway server.
But port SMTP 25 is also open on Airtel dynamic IP in a DMZ setup. I am not using the firewall on the ZTE router. Instead I am blocking all the not required ports via the firewall on my linux gateway server.