Cannot join my friend's server even with DynIP

I'm having this error code whenever I try to join: io.netty.channel.abstractchannel$annotatedconnectexception connection timed out no further information

I have tried using the DynIP too, both DynIP and normal IP shows the same error message. At first, I thought it would be my internet connection and I restarted my router, doesn't solve. I also tried using another launcher. It doesn't work too. Is there something I'm missing?

Please help.

Alright, I have submitted a request. I couldn't able to get the public IP though. The page wouldn't load without VPN. I thought it would make a difference in the IP with VPN. Thanks for the help!