[pptp-server] Client's can't connect?

[Neale Banks]

On Thu, 1 Jun 2000, HiJinX wrote:

> Hi - I have pptpd running on a 192.168.1.11 address behind a router with
> tcp 1723 traffic being forwarded to it.
> I've tried opening port 47 but connections still cannot be made -
> 
> Here's part of the syslog -
[...]
> Jun  1 20:10:11 ras pptpd[302]: GRE: read(fd=4,buffer=804d7ec,len=8196)
> from PTY failed: status = -1 error = Input/output error
> Jun  1 20:10:11 ras pptpd[277]: MGR: Reaped child 302
> Jun  1 20:10:11 ras pptpd[302]: CTRL: PTY read or GRE write failed
> (pty,gre)=(4,5)
> Jun  1 20:10:11 ras pptpd[302]: CTRL: Client 203.63.239.17 control
> connection finished
> Jun  1 20:10:11 ras pptpd[302]: CTRL: Exiting now
> Jun  1 20:35:06 ras squid[207]: NETDB state saved; 0 entries, 10 msec
> 
> Is there anyway around this - or will I have to give the pptpd box a
> live IP address?

GRE is not port 47, but rather IP protocol 47.  So instead of specifying
tcp or udp you need to specify gre or 47 (obviously this is in addition to
the TCP port 1723 stuff).

HTH,
Neale.