See https://documentation.nokia.com/cgi-bin/dbaccessfilename.cgi/9304720101_V1_7750%20SR%20OS%20RADIUS%20Attributes%20Reference%20Guide%2011.0.R1.pdf
# They represent a per host customization of a generic filter policy: only
# traffic to/from the subscriber host will match against these entries
-ATTRIBUTE Alc-Ascend-Data-Filter-Host-Spec 159 string
+ATTRIBUTE Alc-Ascend-Data-Filter-Host-Spec 159 string abinary
# Relative Session-Timeout
ATTRIBUTE Alc-Relative-Session-Timeout 160 integer