/var/btmp with ssh:nottyroot

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Had one Fedora 32 machine that has the ssh port open.
the /var/btmp file was showing a number of lines with the ssh:nottyroot 
line followed by various different IP addresses.

Can stop the sshd service that the btmp file stops growing.

Use to use denyhosts on systems, but it seems to have been removed.
The old denyhost would add blocked ipaddresses to stop these sites?
Know that root is not allowed to login ssh by default, so are these lines 
just saying attempts had been blocked. 

Have vsftpd setup to use passive ports, so blocking port 22 would not be 
a big deal. But just seeing the btmp file grow seems to show wasted 
bandwidth if not showing an issue.

Is it an issue or not??

Thanks.

+------------------------------------------------------------+
 Michael D. Setzer II - Computer Science Instructor (Retired)     
 mailto:mikes@xxxxxxxx                            
 mailto:msetzerii@xxxxxxxxx
 Guam - Where America's Day Begins                        
 G4L Disk Imaging Project maintainer 
 http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+


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