Hello Alan, I was facing a problem with backquotes and the Mikrotik-Rate-Limit atribute, this problem happened when I put something like “%{sql: select....}” in the attribute´s value, everything worked fine BUT in the final result the backquotes is not removed, causing problems in the NAS. Well, at first sight I thought that was a FreeRadius problem, BUT it wasn´t. FreeRadius is so well forged that sometimes we need to do a deep dive into it to figure out how to overcome some “problems”. So, this is what I did to “fix” this, note that NOTHING WAS CHANGED in FreeRadius source code, just the CONFIGURATION was done to adapt everything. 1 – Create a new file called “/usr/bin/echo2” with following contents and make it executable (chmod 755 /usr/sbin/echo2): #!/bin/bash echo $1 | sed -r "s/\`//g" 2 – Edit file /etc/raddb/sites-available/default and ADD the following in the post-auth section: if (reply:Mikrotik-Rate-Limit =~ /.*\`$/i) { update reply { &Mikrotik-Rate-Limit := `/usr/bin/echo2 %{0}` } } 3 – Restart radius. So, the “1” is just a way to execute echo and sed together, because “inside” the FreeRadius conf this doesn´t work, number “2” just identify where exist backquotes in the EXPANSION of the atribute, and, in afirmative case, remove they. SO SIMPLE.... Again, thanks a lot for the work with FreeRadius, you and your team deserve all my respects. Best regards, Rafael Labiak Olivastro http://www.vigo.com.br