diff --git a/aliases b/aliases
index ae0ce0b..6d698e1 100644
--- a/aliases
+++ b/aliases
@@ -6,9 +6,9 @@ mktruckdir() {
 }
 
 randmac() {
-        echo $FQDN|md5sum|sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/'
+       dd status=none if=/dev/urandom bs=1k count=42|md5sum|sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/'
 }
 
 randmacxen() {
-        echo $FQDN|md5sum|sed 's/^\(..\)\(..\)\(..\).*$/00:16:3E:\1:\2:\3'/
+       dd status=none if=/dev/urandom bs=1k count=42|md5sum|sed 's/^\(..\)\(..\)\(..\).*$/00:16:3E:\1:\2:\3'/
 }