SMB symlink not follow

[lost16]

On a Synology NAS I have video files stored in two folders:
/volume1/EVENTS
/volume1/VIDEO

I added the VIDEO and EVENTS folders to MrMC as SMB shares and all videos in the folders play without problems.

To avoid duplicating large video files, I created symlinks ( ln -s....) in the VIDEO folder to some video files in the EVENTS folder.
However, when trying to play a symlink, the login user/password window is continuously popping up, not accepting the login credentials.

Is this a NAS or SMB issue?



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[timstephens24]

Seems like it would a SMB issue, but I'm not 100% sure. If you change from a symlink to a hardlink that issue should go away.

[timstephens24]

I looked it up (have a Synology NAS too, so was a little interested) and in 2010 there was a 'symlink attack' (http://cve.mitre.org/cgi-bin/cvename.cg ... -2010-0926). Due to that they turned off symlink sharing in samba as being on by default.

I wouldn't recommend enabling it, but if you did you'd need to do the following (I didn't test it, so I can't verify these steps will 100% work):

Add to the [global] section of /usr/syno/etc/smb.conf:

Code: Select all

follow symlinks=yes
wide links=yes
unix extensions=no

Then you'll need to restart samba:

Code: Select all

/usr/syno/etc.defaults/rc.sysv/S80samba.sh restart

[lost16]

Thanks for help, I found also about the same info, I guess this is the reason with SMB. I wonder if using FTP or other protocol will help.
I noticed when I mount the two shares on a Mac with AFP, the symlink will work okay, but I understood from this forum that AFP is a kind of dead.


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[timstephens24]

Other protocols probably don't have the same vulnerability, so it might work. I use hardlinks... Love them.