Cannot ssh to Fedora39 after reboot

I am not an expert of computer and now facing an ssh issue. I hope someone can provide me some idea to solve the problem. Previously, everything goes normal that I can ssh to Fedora39 ("Working computer") from my computer ("Home computer"). Recently, I update the kernel to 6.9.9-100.fc39.x86_64 by the following command: $ dnf update kernel Then, I reboot my computer and load into the newest module. Everything seems to be fine, but I find that I cannot ssh to the "Working computer" from my "Home computer". It gives me an error: **Connect to address ... port 22: Resource temporarily unavailable** I try to use my "Working computer" to ssh to "itself", it successes without any error. I also try to check the status in sshd: $systemctl status sshd The status gives me active and load enabled. Anyone have the idea about it? Thank you. **Update** Just want to add more information: I go to https://www.infobyip.com/sshservertest.php and try to connect with the IP with port 22. It is found that the IP cannot be connected.