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Operating Systems Linux SIGHUP received to pppd
# 1  
Old 08-02-2004
SIGHUP received to pppd
Hi all,

I have a question about pppd.
I got a Slack box with kernel 2.4.20.
I'm learning how to connect my CONSOLE to internet with a chat script.
Following these steps, MANY times I can connect to internet very pretty nice.
But also MANY times (says 50%-50%) SIGHUP received to pppd unintentionally.
These are my configurations:-
1. I attached a serial modem to /dev/ttyS0 and created a link ``/dev/modem''
2. I compiled kernel to support PPP.
3. I edit /etc/ppp/pap-secrets, and created a link from chap-secrets to the pap one.
Code:
# cat /etc/ppp/pap-secrets

"my_user_name@my.isp.domain"	*	"my_password"

# ln -s /etc/ppp/pap-secrets /etc/ppp/chap-secrets

4. I created a dial script as following.
Code:
# cat /usr/sbin/dial

#!/bin/sh
/usr/sbin/pppd /dev/modem 115200 connect \
'/usr/sbin/chat "" ATDT1234567 CONNECT' \
noipdefault defaultroute user my_user_name@my.isp.domain

5. I edit /etc/resolv.conf
Code:
# cat /etc/resolv.conf

search my.isp.domain
nameserver 202.57.160.129
nameserver 202.57.128.67
options timeout:60 attempts:9

Then I make a dial call.
As said 50% good, but 50% SIGHUP received to pppd.
And my /var/log/messages is
Code:
# tail -n20 /var/log/messages

Aug  2 20:59:21 darkstar pppd[670]: pppd 2.4.1 started by root, uid 0
Aug  2 20:59:52 darkstar pppd[670]: Serial connection established.
Aug  2 20:59:52 darkstar pppd[670]: Using interface ppp0
Aug  2 20:59:52 darkstar pppd[670]: Connect: ppp0 <--> /dev/modem
Aug  2 20:59:52 darkstar /etc/hotplug/net.agent: assuming ppp0 is already up
Aug  2 21:00:10 darkstar kernel: PPP BSD Compression module registered
Aug  2 21:00:10 darkstar kernel: PPP Deflate Compression module registered
Aug  2 21:00:10 darkstar pppd[670]: local  IP address 202.57.173.157
Aug  2 21:00:10 darkstar pppd[670]: remote IP address 202.57.160.204
Aug  2 21:08:40 darkstar pppd[670]: No response to 4 echo-requests
Aug  2 21:08:40 darkstar pppd[670]: Serial link appears to be disconnected.
Aug  2 21:08:46 darkstar pppd[670]: Connection terminated.
Aug  2 21:08:46 darkstar pppd[670]: Connect time 8.8 minutes.
Aug  2 21:08:46 darkstar pppd[670]: Sent 48095 bytes, received 96163 bytes.
Aug  2 21:08:47 darkstar pppd[670]: Hangup (SIGHUP)
Aug  2 21:08:47 darkstar pppd[670]: Exit.

Could anyone please point me out?
Thanks in advance Smilie

P.S. This internet account work very well with MS Windows, so I think the problem should be in my configuration.
# 2  
Old 08-05-2004
Hi,

Check your modem vendor to see if there's any init string that you should use to keep the connection up. You can also search on your windows connection configuration to some init string.
# 3  
Old 08-05-2004
hi

thanks for your response.

>> init string
do you mean Hayes commands?
i don't think it's about Hayes commands.
because I should have not even got it connected, if Hayes commands have been wrong.
i repeat, 50% of connection is very nice.
my /var/log/messages above shows that SIGHUP received to pppd, while connection is still there.
and i don't understand these messages in /var/log/messages
Code:
Aug  2 21:08:40 darkstar pppd[670]: No response to 4 echo-requests
Aug  2 21:08:40 darkstar pppd[670]: Serial link appears to be disconnected.

Thanks anyway

[edit]
another symptoms
just after connection created i normally do 'ping' somewhere.
1. if 'ping' works properly, connection will last very long and very pretty nice.
2. else, connection will be broken very very soon (not longer than 10 minutes).
So if i force my modem to keep connection up, it still can't ping anywhere.
[/edit]
Last edited by jaguar; 08-07-2004 at 10:39 AM..
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