We have an AWS ami Linux (2017.03) EC2 instance with several shares hosted locally in our office mounted as folders with cifs. Mounting these drives always works, no problem.
/etc/fstab:
//<ip>/share /mnt/xdrive cifs exec,iocharset=utf8,username=<username>,password=<pwd>
//<ip2>/share2 /mnt/ydrive cifs exec,iocharset=utf8,username=<username>,password=<pwd>
However, about half the time when I try to access the files on the shares, I get the error:
Host is down
The local servers are all running Windows Server 2012.
Sometimes if I unmount and remount the shares they start working again, and sometimes if I restart samba they start working again. They all eventually start working after some time.
What could cause this type of intermittent connectivity issue?
Could it be a problem with our Sophos in aws?