[pptp-server] Special routing requirement for pptp?

[Justin Kreger]

Trace with GRE packets..... I think you can change the proto field number
in more recent versions of traceroute, but somebody wrote a hack to just
use GRE packets.  Odds are its a backup link or something in your cable
isp, and it switches over to that at hevey load times..... it probilly
blocks some protocols on purpose to lower traffic.

Justin Kreger, MCP MCSE CCNA
jkreger at earthling.2y.net jwkreger at uncg.edu justin at wss.net


On Tue, 10 Jul 2001, G. Georgiev wrote:

> 	Hello,
> 
> 	Sometimes I am unable to establish the pptp link for hours and I
> wonder if the problem is not with my ISP provider - it looks as if the
> remote end does not reply to the LCP ConfReq. If I forwad the connection
> over another line (modem) it will work. On top of all most of the time it
> works over the cable (my regular internet conection), but it happens to
> fail for many hours.
> 
> 	Is there any special requierement from my ISP for the pptp link to
> work? I remeber that there was some particularity, byt forgot what / where
> I read that.
> 
> 	And how I may check exactly on which router the link is broken?
> 
> 	Thank, George.
> 
> (unknown)[3401]: log[pptp_dispatch_ctrl_packet:pptp_ctrl.c:531]: Client
> connection established.
> (unknown)[3401]: log[pptp_dispatch_ctrl_packet:pptp_ctrl.c:637]: Outgoing
> call established.
> 
> Using interface ppp0
> Connect: ppp0 <--> /dev/ttya0
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x50deaeb>
> <pcomp> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x50deaeb>
> <pcomp> <accomp>]
> ...........
> 
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x50deaeb>
> <pcomp> <accomp>]
> LCP: timeout sending Config-Requests
> Connection terminated.
> (unknown)[3401]: log[pptp_dispatch_ctrl_packet:pptp_ctrl.c:671]: Call
> closed (NTFY) (call id 0)
> (unknown)[3401]: log[pptp_conn_close:pptp_ctrl.c:275]: Closing PPTP
> connection
> Terminating on signal 15.
> 
> 
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