diff --git a/tests/testserver/danted/danted.sh b/tests/testserver/danted/danted.sh
index bf3d154f330..97e2142401f 100755
--- a/tests/testserver/danted/danted.sh
+++ b/tests/testserver/danted/danted.sh
@@ -39,6 +39,25 @@ useradd -d /dev/null -s /bin/false qsockstest; echo "qsockstest:$PASS" | chpassw
 # install configurations and test data
 cp $TESTDATA/danted{,-authenticating}.conf /etc/
 
+# Use the input environment variables to overwrite the default value of internal interfaces.
+if [ "$danted_internal" -a "$danted_internal" != eth0 ]
+then sed -i "s,internal: eth0 port = 1080,internal: $danted_internal port = 1080," /etc/danted.conf
+fi
+
+if [ "$danted_auth_internal" -a "$danted_auth_internal" != eth0 ]
+then sed -i "s,internal: eth0 port = 1081,internal: $danted_auth_internal port = 1081," \
+     /etc/danted-authenticating.conf
+fi
+
+# Use the input environment variables to overwrite the default value of external interfaces.
+if [ "$danted_external" -a "$danted_external" != eth0 ]
+then sed -i "s,external: eth0,external: $danted_external," /etc/danted.conf
+fi
+
+if [ "$danted_auth_external" -a "$danted_auth_external" != eth0 ]
+then sed -i "s,external: eth0,external: $danted_auth_external," /etc/danted-authenticating.conf
+fi
+
 # enable service with installed configurations
 service danted start
 service danted-authenticating start