Some websites not accessible

[Arif3]

Hello

I am Ariful and I got the vodafone internet last month but from yesterday I am facing some issues.
can't able to access some websites like vodafone.de stackoverflow, github and many more.

[Y4sin]

Hello Ariful, it sounds like you're experiencing connectivity issues with your router.

Have you tried troubleshooting the problem by restarting your router or trying a different browser? 

[RobertP]

seems to be a problem with the AFTR gateway

try a factory reset:

to do so press an hold reset button with a paperclip for at least 20 seconds