[CLUE-Tech] mgetty and ppp troubles on linux dialin server

[Jim Ockers]

Daniel,

Yes.  I think your problem is the use of the baud rate 38400 to talk 
to a 14.4 modem.  I had this same problem with a 14.4 modem of my own.

Your init string is probably fine.

Here is what I suggest:

1. use setserial to set the port speed to spd_hi.  setserial /dev/ttyS0 spd_hi
2. If that doesn't work, try spd_normal.
3. If that doesn't work, set mgetty to use 9600 as the port speed, and set
pppd to use 9600 as the port speed.

I think you will find that everything works as expected when you use 9600
as the port speed for everything on the server end.  If so, then try the
various techniques for increasing the ttyS0 port speed to a maximum of 57600.

Hope this helps,
Jim

--
Jim Ockers, P.Eng. (ockers at ockers.net)
Contact info: please see http://www.ockers.net/

daniel wrote:
> 
> Hello all,
> 
> I am trying to set up a dialin server so I can access my network from abroad.
> I have a ZOOM 14.4 external modem connected to ttyS0.  I'm planning to use PAP
> to authenticate. The log messages that I see in the server's
> /var/log/mgetty.log.ttyS0 log file are:
> ---
> 04/14 15:41:38 yS0  mgetty: experimental test release 1.1.30-Dec16
> 04/14 15:41:38 yS0  check for lockfiles
> 04/14 15:41:38 yS0  locking the line
> 04/14 15:41:38 yS0  lowering DTR to reset Modem
> 04/14 15:41:39 yS0  send: \dATQ0V1H0[0d]
> 04/14 15:41:39 yS0  waiting for ``OK'' ** found **
> 04/14 15:41:41 yS0  send: ATS0=0Q0&D3&C1[0d]
> 04/14 15:41:41 yS0  waiting for ``OK'' ** found **
> 04/14 15:41:41 yS0  waiting...
> 04/14 15:45:27 yS0  wfr: waiting for ``RING''
> 04/14 15:45:28 yS0  send: ATA[0d]
> 04/14 15:45:28 yS0  waiting for ``CONNECT''
> 04/14 15:46:48 yS0  timeout in chat script, waiting for `CONNECT'
> 04/14 15:46:48 ##### failed timeout dev=ttyS0, pid=28615, caller='none',
> conn='', name=''
> 
> --
> 04/14 15:46:48 yS0  mgetty: experimental test release 1.1.30-Dec16
> 04/14 15:46:48 yS0  check for lockfiles
> 04/14 15:46:48 yS0   checklock: stat failed, no file
> 04/14 15:46:48 yS0  locking the line
> 04/14 15:46:48 yS0   makelock(ttyS0) called
> 04/14 15:46:48 yS0   do_makelock: lock='/var/lock/LCK..ttyS0'
> 04/14 15:46:48 yS0   lock made
> 04/14 15:46:48 yS0   tio_get_rs232_lines: status: RTS CTS DSR DTR
> 04/14 15:46:48 yS0  lowering DTR to reset Modem
> 04/14 15:46:49 yS0   tss: set speed to 38400 (017)
> 04/14 15:46:49 yS0   tio_set_flow_control( HARD )
> 04/14 15:46:49 yS0   waiting for line to clear (VTIME), read: 
> 04/14 15:46:49 yS0  send: \dATQ0V1H0[0d]
> 04/14 15:46:49 yS0  waiting for ``OK''
> 04/14 15:46:49 yS0   got: ATQ0V1H0[0d]
> 04/14 15:46:49 yS0    CND: ATQ0V1H0[0d][0a]OK ** found **
> 04/14 15:46:51 yS0  send: ATS0=0Q0&D3&C1[0d]
> 04/14 15:46:51 yS0  waiting for ``OK''
> 04/14 15:46:51 yS0   got: [0d]
> 04/14 15:46:51 yS0    CND: OK[0a]ATS0=0Q0&D3&C1[0d]
> 04/14 15:46:51 yS0    CND: ATS0=0Q0&D3&C1[0d][0a]OK ** found **
> 04/14 15:46:51 yS0   waiting for line to clear (VTIME), read: [0d][0a]
> 04/14 15:46:51 yS0   removing lock file
> 04/14 15:46:51 yS0  waiting...
> 04/14 16:46:51 yS0    select returned 0
> 04/14 16:46:51 yS0  checking if modem is still alive
> 04/14 16:46:51 yS0   makelock(ttyS0) called
> 04/14 16:46:51 yS0   do_makelock: lock='/var/lock/LCK..ttyS0'
> 04/14 16:46:51 yS0   lock made
> 04/14 16:46:51 yS0  mdm_send: 'AT'
> 04/14 16:46:51 yS0    got:AT[0d]
> 04/14 16:46:51 yS0   mdm_command: string 'AT'
> 04/14 16:46:51 yS0    got:[0d][0a]OK[0d]
> 04/14 16:46:51 yS0   mdm_command: string 'OK' -> OK
> 04/14 16:46:51 yS0   waiting for line to clear (VTIME), read: 
> 04/14 16:46:51 yS0   removing lock file
> 04/14 16:46:51 yS0  waiting...
> ---
> 
> My /etc/inittab file has the entry:
> ---
> S0:2345:respawn:/sbin/mgetty ttyS0 /dev/ttyS0
> ---
> 
> My /etc/mgetty+sendfax/login.config file has:
> ---
> /AutoPPP/ - - /usr/sbin/pppd file /etc/ppp/options.server
> ---
> 
> My /etc/ppp/options.server file
> ---
> asyncmap 0
> modem
> crtscts
> lock
> auth
> refuse-chap
> require-pap
> proxyarp
> 192.168.1.1:192.168.1.11
> ---
> 
> My /etc/mgetty+sendfax/mgetty.config has:
> ---
> debug 4
> speed 38400
> port ttyS0
>      debug 9
>      data-only y
> ---
> 
> 
> Does anyone have any suggestions on how I might be able to get this working?
> One thing that I am unsure about is reading what init string is being used,
> and whether that init string is the one suggested from my modem's manual.  The
> manual says to use "  AT &F &C1 &D2  ". If the incorrect init string is being
> used, I think I need to change that in /etc/mgetty+sendfax/mgetty.config, but
> I am not sure how to make that entry.
> Any ideas or suggestions are greatly appreciated :)
> 
> Thanks,
> Daniel
> _______________________________________________
> CLUE-Tech mailing list
> Post messages to: CLUE-Tech at clue.denver.co.us
> Unsubscribe or manage your options: http://clue.denver.co.us/mailman/listinfo/clue-tech
>