may differ from your setup but other may find it and help them

if you are connecting from a windows client to a work place windows server

this is needed for it to work through an openwrt router

it used to be shown on old openwrt help pages but was replaced

as the context on the help page is an openwrt pptp server not external pptp sever

Hi, I have a PPTP connection that I want to configure and I need help.

The connection options must be as the image below:


I've tried to edit /etc/ppp/options.pptp but it didn't work.

My options.pptp file now looks like this:


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I need to configure 857W as PPTP client. PPTP is officialy not supported (there is no such protocol in request-dialin group) but it could be enabled with "service internal".Any way, my questions are not pptp-specific, I believe.

Point-to-Point Tunneling Protocol (PPTP) traffic is uniquely identified by a source IP address and a Call ID field in the GRE header. When multiple clients connect to the same VPN endpoint behind a common Network Address Translation (NAT), they all have the same source IP address. Because the different VPN clients are unaware of each other, they might choose the same Call ID field, which prohibits multiple connections because the VPN endpoint has no way to differentiate between the various connections.

I have a problem, we are trying to connect to a PPTP server from behind a M590 cluster, I have the PPTP rule in place and I see the allow attempts while Im trying to connect - but connection never get established, instead it ends with misc errors.

Windows 10 client with bulit in PPTP VPN setup.

I have a similar issue, just swapped an M500 for the M590.

Outbound PPTP VPN worked before the swap, now it shows allowed but gets stuck at 'verifying username and password'.

I have tried adding registry keys to the client PC (as we had this issue after a windows update some years ago), but no joy.

Here is the link in case you want to try it:

 -us/troubleshoot/windows-server/networking/configure-l2tp-ipsec-server-behind-nat-t-device

Any update on this? Im having exactly the same issue with 2 pairs of M690s was working fine and now nothing. Tried everything you have mentioned above and can see the pptp traffic leave site and hit the other end but not seeing GRE and getting an error authenticating.

The Automatic policy generated "WatchGuard IPSec", made when you tick the box in the VPN settings doesn't work on the M390. The only thing showing up in the logs was a single deny from the client's workstation to the external IP address. Protocol gre, (unhandled Internal Packet-00). The fix was to disable the automatically generated policy and make my own custom policy for IPSec Outbound. From any-trusted to any-external (instead of any), ports are gre, esp, ah, udp:500 and udp:4500.

PPTP is a secure tunnel for transporting IP traffic using PPP. PPTP encapsulates PPP in virtual lines that run over IP. PPTP incorporates PPP and MPPE (Microsoft Point to Point Encryption) to make encrypted links. The purpose of this protocol is to make well-managed secure connections between routers as well as between routers and PPTP clients (clients are available for and/or included in almost all OSs including Windows).

PPTP client from the laptop should connect to routers public IP which in our example is 192.168.80.1. 

(Consult the respective manual on how to set up a PPTP client with the operating system software you are using).

At this point (when PPTP client is successfully connected) if you try to ping any workstation form the laptop, the ping will time out because the Laptop is unable to get ARPs from workstations. The solution is to set up proxy-arp on the local interface.

Office and Home routers are connected to the internet through ether1, workstations and laptops are connected to ether2.Both local networks are routed through a PPTP client, thus they are not in the same broadcast domain. If both networks should be in the same broadcast domain then you need to use BCP and bridge the PPTP tunnel with the local interface.

Notice that we set up PPTP server's PPP secret where a route is added automatically whenever the client connects. If this option is not set, then you will need to add static routing on the server to route traffic between the two sites through the PPTP tunnel. (See PPP User Database for more info on routes variable).

A very nice feature is the inclusion of a ready-to-go PPTP client configuration in the Web Interface. It has some limitations (addressed further along in this HOW-TO) but for many users you don't need anything more that what you get in the Web Interface.

In my case, with a Dynamically assigned IP of 10.177.140.X, VPN server's public IP of 234.234.158.62, and Gateway showing up as blank in ipconfig using the windows client, I used the following info. Also, advanced routing didn't work at all for me, I had to use the above instructions about additional remote networks on a Samba share to initiate the required route. We have servers covering the entire 10.177.0.0 network. To just access the entire 10.177 network without scripts, change #2 below to 10.177.0.0, and #3 below to 255.255.255.0.

7. Administration -> Services -> PPTP Client -> NAT = Enable (doesn't work for me, but I run some scripts that call the `/tmp/pptpd_client/ip_up ppp0` script. Note the ip_up script is copied to that directory by the firmware when pptp client is enabled, I think.)

8. Administration -> Services -> PPTP Client -> Username = DOMAIN\username (!!! DO NOT USE two backslashes !!! - I found out by using the /tmp/pptpd_client/vpn script in debug mode that this string is ALREADY ESCAPED. This was the KEY to getting my vpn to start up. My work's MS vpn server rejected my connection until I removed the extra backslash. This might be a latest-and-greatest at this time firmware thing (?))

I was able to figure out my options by debugging. If you want to debug, use `/tmp/pptpd_client/vpn debug` to try to start up your vpn connection. Here is a list of all the options you can set in the /tmp/pptpd_client/options.vpn file to attempt to figure out which ones work for you. Note the common ones are on the top. These options are the same as the Additional PPTP Options (which should be named "Additional pppd Options"). Once you figure out the right options on the command line, save them in the gui! 589ccfa754

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