Aw: Re: Howto log multiple sftpd instances with their chroot shared via NFS

[Hildegard Meier]

>I don't think it should be this hard to fix.  I'd like to help.

Thanks David, your help is much appreciated.

>What is /dev/log on each server (not the one in chroot).  I.e. output of ls -l /dev/log

On the next generation sftp server (Ubuntu 18.04.1 LTS with it's shipped OpenSSH 7.6p1-4ubuntu0.5):
ls -l /dev/log
lrwxrwxrwx 1 root root 28 Aug 27 11:54 /dev/log -> /run/systemd/journal/dev-log

On the old (to be replaced with the new) sftp server (Ubuntu 12.04.5 LTS with it's shipped OpenSSH 5.9p1-5ubuntu1.10):
ls -l /dev/log
srw-rw-rw- 1 root root 0 Sep 23 15:07 /dev/log

>For external sftp, what is /dev/log in each NFS chroot?  I.e. output of ls -l /var/data/chroot/dev/log

Both above sftp servers (old and new generation) mount /var/data/chroot/ from a third NFS server appliance.
Every sftp user has it's (chroot) home dir /var/data/chroot/<username>/ under that single NFS mount.

E.g. for the user "sftp_nagios" this is 

ls  -l /var/data/chroot/sftp_nagios/dev/log
srw-rw-rw-+ 1 root root 0 Sep 29 11:26 /var/data/chroot/sftp_nagios/dev/log

Best regards