[pptp-server] Unsupported protocol 0xd057 received

[Philip Van Baren]

This error could be due to lost or out-of-order packets.  ppp_mppe has a bug
that prevents it from re-syncing after a lost packet.  Look on the
poptop.lineo.com download page for the ppp_mppe.c compressed data bug patch
to fix this.

If packets are being dropped because of packet ordering problems, try
pptpd-1.1.2.

Phil

> -----Original Message-----
> From: pptp-server-admin at lists.schulte.org
> [mailto:pptp-server-admin at lists.schulte.org]On Behalf Of Jeff Zacharias
> Sent: Friday, October 13, 2000 2:30 AM
> To: pptp-server at lists.schulte.org
> Subject: [pptp-server] Unsupported protocol 0xd057 received
>
>
> I'm using redhat 7 with kernel 2.2.16-22, with pptpd-1.0.0-1.i386.rpm and
> ppp-2.3.11 with patch ppp-2.3.11-openssl-0.9.5-mppe.patch.gz.  With this
> config it did not compile the ppp module in the kernel.  So it
> was suggested
> to me that I change the following line in the
> /usr/src/linux/drivers/net/ppp.c
>
> kill_fasync (ppp->tty->fasync, SIGIO);
>
> to
>
> kill_fasync (ppp->tty->fasync, SIGIO, POLL_IN);
>
> With this change it finally compiled.  Now when I do all the
> rmmod and insmod,
> and start pptpd, I can connect with win98 client, but I cannot
> ping the server
> signed pptpd IP address (192.168.21.2).  And I get the following
> error in the
> /var/log/messages.
>
>
> Oct 12 22:33:19 zebra pptpd[4241]: CTRL: Client 192.168.20.5 control
> connection started
> Oct 12 22:33:19 zebra pptpd[4241]: CTRL: Starting call (launching pppd,
> opening GRE)
> Oct 12 22:33:19 zebra pppd[4242]: pppd 2.3.11 started by root, uid 0
> Oct 12 22:33:19 zebra pppd[4242]: Using interface ppp1
> Oct 12 22:33:19 zebra pppd[4242]: Connect: ppp1 <--> /dev/pts/3
> Oct 12 22:33:19 zebra pppd[4242]: MSCHAP peer authentication
> succeeded for f
> Oct 12 22:33:19 zebra pppd[4242]: found interface eth1 for proxy arp
> Oct 12 22:33:19 zebra pppd[4242]: local  IP address 192.168.21.2
> Oct 12 22:33:19 zebra pppd[4242]: remote IP address 192.168.21.52
> Oct 12 22:33:19 zebra pppd[4242]: MPPE 40 bit, stateless
> compression enabled
> Oct 12 22:33:20 zebra pppd[4242]: Unsupported protocol 0xd057 received
> Oct 12 22:33:22 zebra pppd[4242]: Unsupported protocol 0x8bd2 received
> Oct 12 22:33:22 zebra pppd[4242]: Unsupported protocol 0xe658 received
> Oct 12 22:33:22 zebra pppd[4242]: Unsupported protocol 0x587c received
> Oct 12 22:33:23 zebra pppd[4242]: Unsupported protocol 0xcf26 received
> ...etc
>
> I should also note that if I turn off the encryption part,
> everything works
> fine and I can ping what I want and access what I want over the pptp
> connection.  Is there any fix for this?
>
> Sincerely
> Jeff Zacharias
> zffej at netscape.net
>
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