I'm guessing the problem lies with duckdns. You could replace the host name with the IP code for the server and see if that works. If it does, you can be sure it's a problem with your duckdns setup.@Glorious1 , @Ascotg
Thanks, but it is still not working with Firefox (even when I remove localhost from "No proxy".
Actually there might be an error with duckdns cause it is not responding when I ping it. I attach posts of my putty and firefox settings to see if there is any mistakes. Thanks,
PS : it's in french but I think you wouldn t have any difficulties to translate :)