Hi all,

I am attempting to create a connection over a pair of serial modems between two computers. The idea is to allow me to log into the one machine from the other remotely over a telephone line.

I have managed to create the connection using a combination of mgetty, ppp and kppp. The connection is established fine -- kppp brings up a terminal window that allows me to login to the remote machine. Using this terminal I can look around and view things (using the less command). When I click continue, the ppp connection is established.

I know that this connection is established because pinging the remote machine returns some packets at the beginning but then stops. In general, every time I connect the machines and I ping the remote server I get about 5 packets returned and then nothing -- no packets get returned.

Does anyone know of a way to reduce this problem. I can cope with a slow connection but I have to be able to ssh into the remote machine and alter files on it. I also need to be able to send new files from my home machine to the remote machine.

I have tried a range of speeds for the modem and ppp connections with no difference in the results. I have also used most of the pppd options to try and solve the problem.

Any suggestions will be appreciated.

Thanks

Brian

Try using hardware flow control....
Add "modem" and "crtscts" to /etc/ppp/options. Be sure that kppp doesn't override these. Browse the tabs, and check that it doesn't specify "xonxoff" (software flow control).
If it doesn't work, add "debug" to see what's going on in /var/log/* (and grep for pppd).

Also, the output of ps may indicate how pppd is being called...

There's another esoteric option named "cdtrcts". See pppd(8)

In the end, you must have the same upload/download speed.

Hi Primo,

Thanks for the assistance -- I discovered that the pppd call is being made with xonxoff as well as crtscts. I am sure this is the problem -- just have find where the xonxoff setting is coming from since none of my settings (or kppp's settings) have that option set.

Thanks again

Brian