VPN Setup and iternal /external IP/Domains

I’ve setup and tested VPN as per your instructions. Works fine. I’m connecting from ‘Mac Internal IP (192.168.50.25)’ to ‘Server Internal IP (192.168.50.100)’. However, when I use the ‘External Subdomain (vpn.server.com)’ with port 1723 (TCP) routed through to ‘Server Internal IP (192.168.50.100)’ VPN connects, then immediatly disconnects.

So…

192.168.50.25 <–> 192.168.50.100 – works
192.168.50.25 <–> vpn.server.com <–>192.168.50.100 – immediate disconnect.

Here’s the log:

Oct 2 15:09:41 theserver pppd[10123]: pppd 2.4.0 started by admin, uid 0
Oct 2 15:09:41 theserver pppd[10123]: PPTP incoming call in progress from ‘217.44.138.144’…
Oct 2 15:09:41 theserver mach_kernel: pptp_wan_attach, link index = 0, (ld = 0x282d004)
Oct 2 15:09:41 theserver pppd[10123]: PPTP connection established.
Oct 2 15:09:41 theserver pppd[10123]: Using interface ppp0
Oct 2 15:09:41 theserver pppd[10123]: Connect: ppp0 <–> socket[34:17]
Oct 2 15:10:11 theserver pppd[10123]: PPTP hangup
Oct 2 15:10:11 theserver pppd[10123]: Connection terminated.
Oct 2 15:10:11 theserver pppd[10123]: PPTP disconnecting…
Oct 2 15:10:11 theserver pppd[10123]: PPTP disconnected
Oct 2 15:10:11 theserver pppd[10123]: Exit.

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Bearing in mind I haven’t tested this from an external source as yet. That may be the issue (the loop through). But I thought I’d post just incase it could be something else.

Thanks

Barrie