On Sun, 2005-03-13 at 10:21, David Ronis wrote:
> Hi,
>
> I'm trying to use ssh and pppd to set up a ppp tunnel between my
> laptop at home and a machine at work. Both machines are running a
> 2.6.11 kernel, slackware 10.[01] and have pppd 2.4.3 installed. I
> more or less followed the instructions in the ppp-ssh howto, which
> essentially runs the following command as root:
>
> /usr/sbin/pppd ktune noauth updetach passive pty
> "${REMOTE_COMMAND}" ipparam vpn ${CLIENT_IFIPADDR}:${SERVER_IFIPADDR}
>
> where
>
> REMOTE_COMMAND=ssh -l ${SERVER_USERNAME} ${SERVER_HOSTNAME} \
> sudo /usr/sbin/pppd ktune noauth nodetach notty proxyarp ipparam vpn
>
> where ${SERVER_USERNAME} has sudo privilages on ${SERVER_HOSTNAME}.
>
> and where ${CLIENT_IFIPADDR} is the IP address my laptop has when it's
> connected at work and where ${SERVER_IFIPADDR} is the IP address of
> the server 132.206.205.86 and 132.206.205.91, respectively.
>
> ifconfig shows:
>
> ppp0 Link encap:Point-to-Point Protocol
> inet addr:132.206.205.86 P-t-P:132.206.205.91 Mask:255.255.255.255
> UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
> RX packets:4 errors:0 dropped:0 overruns:0 frame:0
> TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:3
> RX bytes:62 (62.0 b) TX bytes:4590 (4.4 Kb)
>
> on the client and
>
> ppp0 Link encap:Point-to-Point Protocol
> inet addr:132.206.205.91 P-t-P:132.206.205.86 Mask:255.255.255.255
> UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
> RX packets:4 errors:0 dropped:0 overruns:0 frame:0
> TX packets:49 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:3
> RX bytes:62 (62.0 b) TX bytes:4302 (4.2 Kb)
>
> on the server.
>
> pppd has created route entries:
>
> 132.206.205.86 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
>
> on the server
>
> and
> 132.206.205.91 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
>
> on the client
>
> If I ping 132.206.205.86 from the client I get a response, but if I
> ping the server (132.206.205.91) I get nothing.
>
> Similarly, pinging the client from the server doesn't get a reply.
>
> Finally, the connection times out.
>
>
> My suspicion is that I'm close, but am making some sort of trivial
> mistake. Any ideas?
>
I am certainly no expert but I would next try traceroute
ip_of_remote_end on bothe ends and try to figure out where the packets
are going. The route command output is curious it may be valid but I am
used to seeing * instead of 0.0.0.0 for the gateway ip.
Looking at eh transmit and recieve byte counts looks like the packets
are not getting there. I would delete the routes manually and recreate
them if the packets are not getting there.
Bret
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