[pptp-server] Forwarding GRE
Philip Van Baren
phil at vibrationresearch.com
Wed Oct 18 17:12:23 CDT 2000
Does this help?
7.3.5. Get "pptpd[24120]: GRE: read(fd=5,buffer=804d9c0,len=8196) from
PTY failed: status = -1 error = Input/output error"
"pptpd[24120]: CTRL: PTY read or GRE write failed (pty,gre)=(5,6)"
"pptpd[24120]: CTRL: Client 12.72.37.31 control connection finished"
errors in your log file when the pptpd program is running on a machine
behind a masq'ed firewall.
Solution: Apply the ip_masq_vpn.patch patch file to kernel.
Also, look at Linux VPN Masquerade HOWTO: Patching and configuring
kernel for VPN Masquerade support for details.
> -----Original Message-----
> From: pptp-server-admin at lists.schulte.org
> [mailto:pptp-server-admin at lists.schulte.org]On Behalf Of Al Ludwig
> Sent: Wednesday, October 18, 2000 5:28 PM
> To: pptp-server at lists.schulte.org
> Subject: [pptp-server] Forwarding GRE
>
>
> Hello,
>
> It looks like my firewall will not forward GRE through to my PPTP Server.
> If this turns out to be the case, does anyone know of any documents on how
> to create a tunnel back to the client via PPTP? The Firewall is
> letting GRE
> out, and I've seen it mentioned before, but I'm unable to find anything
> worthwhile on it. Any ideas would be greatly appreciated.
>
> Thanks,
>
> -AL
>
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