diff --git a/pptp/README.md b/pptp/README.md
index 4c367a10f..f4975008b 100644
--- a/pptp/README.md
+++ b/pptp/README.md
@@ -13,11 +13,19 @@ pptp:
     - TUNNEL=vps
     - USERNAME=username
     - PASSWORD=password
+    - ROUTES=0.0.0.0/1 128.0.0.0/1
   net: host
   privileged: yes
   restart: unless-stopped
 ```
 
+## available parameters (passed as environment variables)
+
+* `SERVER`: IP or hostname of the VPN server
+* `TUNNEL`: name of the tunnel
+* `USERNAME` / `PASSWORD`: auth info for the server
+* `ROUTES`: space separated list of routes that should be routed through the VPN. By default all traffic is routed
+
 ## up and running
 
 ```
diff --git a/pptp/docker-entrypoint.sh b/pptp/docker-entrypoint.sh
index dcff73c2b..7e0e8924b 100755
--- a/pptp/docker-entrypoint.sh
+++ b/pptp/docker-entrypoint.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+ROUTES=${ROUTES:-0.0.0.0/1 128.0.0.0/1}
+
 cat > /etc/ppp/peers/${TUNNEL} <<_EOF_
 pty "pptp ${SERVER} --nolaunchpppd"
 name "${USERNAME}"
@@ -10,16 +12,14 @@ file /etc/ppp/options.pptp
 ipparam "${TUNNEL}"
 _EOF_
 
-cat > /etc/ppp/ip-up <<"_EOF_"
-#!/bin/sh
-ip route add 0.0.0.0/1 dev $1
-ip route add 128.0.0.0/1 dev $1
-_EOF_
+echo "#!/bin/sh" > /etc/ppp/ip-up
+for route in $ROUTES; do
+    echo "ip route add ${route} dev \$1" >> /etc/ppp/ip-up
+done
 
-cat > /etc/ppp/ip-down <<"_EOF_"
-#!/bin/sh
-ip route del 0.0.0.0/1 dev $1
-ip route del 128.0.0.0/1 dev $1
-_EOF_
+echo "#!/bin/sh" > /etc/ppp/ip-down
+for route in $ROUTES; do
+    echo "ip route del ${route} dev \$1" >> /etc/ppp/ip-down
+done
 
 exec pon ${TUNNEL} debug dump logfd 2 nodetach persist "$@"