pppd Troubles – what to dododoo?

[Conrad Ljungström]

I can’t seem to establish a connection using pppd. My interface goes up only for a short time before it disappears again. Here’s what it looks like if I do “ip a”

18: ppp0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 3 link/ppp

And this is what it says in /var/log/messages:

---

Jun 19 16:58:59 mtcdp daemon.info pppd[11342]: Serial connection established.

Jun 19 16:58:59 mtcdp daemon.info pppd[11342]: Using interface ppp0

Jun 19 16:58:59 mtcdp daemon.notice pppd[11342]: Connect: ppp0 <–> /dev/ttyUSB3

Jun 19 16:59:19 mtcdp daemon.info pppd[11342]: CHAP authentication succeeded

Jun 19 16:59:19 mtcdp daemon.notice pppd[11342]: CHAP authentication succeeded

Jun 19 16:59:19 mtcdp daemon.warn pppd[11342]: kernel does not support PPP filtering

Jun 19 16:59:21 mtcdp daemon.info pppd[11342]: Hangup (SIGHUP)

Jun 19 16:59:21 mtcdp daemon.notice pppd[11342]: Modem hangup

Jun 19 16:59:21 mtcdp daemon.notice pppd[11342]: Connection terminated.

Jun 19 16:59:22 mtcdp daemon.info pppd[11342]: Exit.

---

Here’s my “3g” file (equivalent to gsm or cdma)

---

/dev/ttyUSB3

230400

idle 7200

lock

crtscts

modem

noauth

replacedefaultroute

defaultroute

user Anyname

password Anypassword

connect “/usr/sbin/chat -V -f /etc/ppp/telenor.chat”

connect-delay 20000

noipdefault

usepeerdns

nobsdcomp

novj

persist

---

And here’s my “telenor.chat”

---

ABORT BUSY

ABORT “NO CARRIER”

ABORT ERROR

REPORT CONNECT

TIMEOUT 10

“” “AT&F”

OK “ATE1”

OK “AT+CGDCONT=1,42IP42,42internet.telenor.se42”

SAY “Calling Telenorn”

TIMEOUT 60

OK “ATD*99***1#”

CONNECT c

---

The only reason I can think of as to why it’s not connecting properly is that there is something wrong with the connection settings. Will continue looking but if someone has any ideas that would be lovely ^_^

[Lonny Knudson]

Hi Conrad,

Try using this chat script:

ABORT BUSY

ABORT “NO CARRIER”

ABORT ERROR

REPORT CONNECT

TIMEOUT 10

“” “ATE1”

OK ‘AT+CGDCONT=1,”IP”,”internet.telenor.se”‘

SAY “Calling Telenorn”

TIMEOUT 60

OK “ATD*99***1#”

CONNECT c

Please let us know if it corrects the problem.

[Conrad Ljungström]

Hi!

I exchanged my telenor.chat for the one your provided. I got no feedback in the console (am i supposed to?) but ip a gives:

---

ppp0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 3 link/ppp

---

like before. So no change there. excerpt from /var/log/messages

---

Jun 19 18:58:00 mtcdp daemon.info pppd[15605]: Serial connection established.

Jun 19 18:58:00 mtcdp daemon.info pppd[15605]: Using interface ppp0

Jun 19 18:58:00 mtcdp daemon.notice pppd[15605]: Connect: ppp0 <–> /dev/ttyUSB3

Jun 19 18:58:20 mtcdp daemon.info pppd[15605]: CHAP authentication succeeded

Jun 19 18:58:20 mtcdp daemon.notice pppd[15605]: CHAP authentication succeeded

Jun 19 18:58:20 mtcdp daemon.warn pppd[15605]: kernel does not support PPP filtering

Jun 19 18:58:22 mtcdp daemon.info pppd[15605]: Hangup (SIGHUP)

Jun 19 18:58:22 mtcdp daemon.notice pppd[15605]: Modem hangup

Jun 19 18:58:22 mtcdp daemon.notice pppd[15605]: Connection terminated.

---

The SIM I have is Telenor connexion, I don’t know for sure but could they be a separate provider and have a different address?

[Bryan Tran]

Hi ConRad,

Can you try to dial the number as follow:

*99#

If it is still not working, try this number:

*99*1#

And see if it helps

Regards,

BT

[Conrad Ljungström]

Hiya Bryan!

Sorry it didn’t work with either of those.. I’m assuming I was to switch out

OK “ATD*99***1#” for

OK “ATD*99#” and

OK “ATD*99*1#”

same thing logged in messages. :/

[Lonny Knudson]

Hi Conrad,

When we see the connection hang up shortly after the authentication phase, the most common cause is incorrect APN/username/password. Have you verified that your account has access to the “internet.telenor.se” APN ? Do you know if this APN requires a username and password? I’m assuming that the username and password referenced in your peer file are just placeholders, this shouldn’t cause a problem if the APN doesn’t require a specific username and password. However, if this APN does require specific credentials you need to configure pppd to use them. Please let us know if this helps.

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