LinuxQuestions.org - [SOLVED] Having difficulties to connect to the internet with a USB-UMTS-Modem

- Slackware (https://www.linuxquestions.org/questions/slackware-14/)

- - Having difficulties to connect to the internet with a USB-UMTS-Modem (https://www.linuxquestions.org/questions/slackware-14/having-difficulties-to-connect-to-the-internet-with-a-usb-umts-modem-4175420175/)

Quote:

Originally Posted by Darth Vader (Post 4745434)

Still, how about to show me the complete dump of dmesg?

I'm curious if the modem is really switched from "installation" mode to "working mode"...

Idea is if your modem have an builtin software presented for installation, is very posible to have two working modes.

Well, here it is.

Quote:

Originally Posted by markush (Post 4745440)

Well, here it is.

Yeah, your modem is directly supported by usb_modeswitch as device 12d1:1446 and it is switched well. :)

Try this for a possible solution. -->http://ubuntuforums.org/showthread.php?t=1583103

But preferably NM :)

Try adding this to the pppd chat script.

Code:

AT+CGDCONT=1,"IP","wap.eplus.de"

and changing the password to 'wap'
The user name and password that you supplied in post #1 appear to relate to E-Plus i-mode access.
For use with your modem, you need to use the General Internet access settings.http://www.areamobile.de/static/zugang/e-plus.php
or, in English http://translate.googleusercontent.c...8lSkwhii2ucQ#2

Quote:

Originally Posted by allend (Post 4745825)

Try adding this to the pppd chat script.

Code:

AT+CGDCONT=1,"IP","wap.eplus.de"

Hi allend,

there are several providers who use the eplus net. I'm using AldiTalk which uses the string "internet.eplus.de" http://www.alditalk.de/talk/download...-Anleitung.pdf. But it seems to be the case that one has only to provide this string in order to account the flatrate (30 days with max 5GB in this case), there is another string when one wants to account the 24h flatrate. But I found out, that I receive an errormessage when I provide this string once I have accounted the flatrate, it seems to be stored on the sim-card and is not necessary while authentication. (but I'm not sure).

But now I saw that they use different passwords. My problem is that I cannot seem to find out how far pppd goes when connecting. I have read about ppp and it seems to fail during authentication. I'd like to have more knowledge about scripting for pppd or chat respectively. Then I could make the scripts show me where they are. Now pppd and chat provide an errorcode which is explained in the manpages, but it is not clear where in the script pppd hung up.

Markus

Errors from pppd are logged in /var/log/syslog.
You can use a debug option to pppd that will give more detail.
Perhaps you also need to specify the protocol to use, probably CHAP or PAP. I could not find this specified in the .pdf that you posted, but it has been many years since my reading German course.

You seem to be using a password of 'gprs', when the pdf file you attached shows a password of 'eplus' Not saying that's in any way significant, just a bit odd.

Still plumping for kppp or NM from here :)

Hello vdemuth,

the automatical configuration of the Modem in Windows shows "gprs" as a password, I tried both, but it still doesn't work.

I've tried kppp, but pppd crashed with fatal error every time. Also I don't even for kppp know the appropriate settings for the modem.

I have no experience with NM, I will try to find some documentation.

Markus

your connection is established. pppd would not get that far, if it wasn't.
in your peers/umts, try to enable hardware flow control ( crtscts ), remove noccp and nobsdcomp, you might need it.

Code:

Cannot determine ethernet address for proxy ARP

this line looks quite strange to me. try the noproxyarp option.

i'quite in a hurry atm, so i just took a quick glance at pppd(8)

This is how I connected using a Huawei e220 on OpenBSD. You might find some of the options helpful. The MTU may need to be set at something much lower than 1500 for starters.

3ireland.ie

Code:

/dev/cuaU0

crtscts

460800

modem

lock

noipdefault

defaultroute

persist

noauth

ipcp-restart 10

ipcp-accept-local

ipcp-accept-remote

0.0.0.0:10.64.64.64

deflate 0

bsdcomp 0

noccp

novj

novjccomp

nopcomp

mru 1440

connect 'chat -v -f /etc/ppp/three.chat'

3chat

Code:

ABORT "NO CARRIER"

ABORT "NO DIALTONE"

ABORT "ERROR"

ABORT "NO ANSWER"

ABORT "BUSY"

TIMEOUT 60

'' "AT"

OK 'AT+CGDCONT=1,"ip","3ireland.ie"'

OK "ATDT*99#"

TIMEOUT 40

CONNECT \c

I think I'm a big step further now. My latest settings are similar to gezley's

Code:

#/etc/ppp/peers/umts

hide-password                                                                    

noauth                                                                            

connect "/usr/sbin/chat -V -f /etc/ppp/umts.chat"                                

debug                                                                            

/dev/ttyUSB0                                                                      

460800                                                                            

defaultroute                                                                      

noipdefault                                                                      

noproxyarp

crtscts

local

user "eplus"

password "gprs"

usepeerdns

connect-delay 10000

persist

Code:

# /etc/ppp/umts.chat

#OK READY-AT+CPIN=8687    # PIN has to be only once when the Modem is connected                                              

'' AT                                                                            

#'OK' 'AT+cgdcont=1,"IP","internet.eplus.de"'                                    

OK ATDT*99#

and here the output

Code:

thinkpad:~# pppd call umts debug nodetach

AT                                                                      

OKScript /usr/sbin/chat -V -f /etc/ppp/umts.chat finished (pid 3704), status = 0x0

Serial connection established.

using channel 1

Using interface ppp0

Connect: ppp0 <--> /dev/ttyUSB0

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x864c077d> <pcomp> <accomp>]

rcvd [LCP ConfReq id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0x10d2e01> <pcomp> <accomp>]

sent [LCP ConfAck id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0x10d2e01> <pcomp> <accomp>]

rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x864c077d> <pcomp> <accomp>]

sent [LCP EchoReq id=0x0 magic=0x864c077d]

rcvd [LCP DiscReq id=0x1 magic=0x10d2e01]

rcvd [CHAP Challenge id=0x1 <52050fd3beb6267f28b5a7c6fcba662c>, name = "UMTS_CHAP_SRVR"]

sent [CHAP Response id=0x1 <76de2e4f872b76519e1fc5422df40711>, name = "eplus"]

rcvd [LCP EchoRep id=0x0 magic=0x10d2e01 86 4c 07 7d]

rcvd [CHAP Success id=0x1 ""]

CHAP authentication succeeded

CHAP authentication succeeded

sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]

sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]

rcvd [LCP ProtRej id=0x2 80 fd 01 01 00 0f 1a 04 78 00 18 04 78 00 15 03 2f]

Protocol-Reject for 'Compression Control Protocol' (0x80fd) received

rcvd [IPCP ConfNak id=0x1 <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

sent [IPCP ConfReq id=0x2 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

rcvd [IPCP ConfNak id=0x2 <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

sent [IPCP ConfReq id=0x3 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

rcvd [IPCP ConfNak id=0x3 <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

sent [IPCP ConfReq id=0x4 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

rcvd [IPCP ConfReq id=0x0]

sent [IPCP ConfNak id=0x0 <addr 0.0.0.0>]

rcvd [IPCP ConfRej id=0x4 <compress VJ 0f 01> <ms-wins 10.11.12.13> <ms-wins 10.11.12.14>]

sent [IPCP ConfReq id=0x5 <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns2 10.11.12.14>]

rcvd [IPCP ConfReq id=0x1]

sent [IPCP ConfAck id=0x1]

rcvd [IPCP ConfNak id=0x5 <addr 10.128.53.15> <ms-dns1 212.23.97.3> <ms-dns2 212.23.97.2>]

sent [IPCP ConfReq id=0x6 <addr 10.128.53.15> <ms-dns1 212.23.97.3> <ms-dns2 212.23.97.2>]

rcvd [IPCP ConfAck id=0x6 <addr 10.128.53.15> <ms-dns1 212.23.97.3> <ms-dns2 212.23.97.2>]

Could not determine remote IP address: defaulting to 10.64.64.64

local  IP address 10.128.53.15

remote IP address 10.64.64.64

primary  DNS address 212.23.97.3

secondary DNS address 212.23.97.2

Only problem was that I still cannot connect to the internet. I've included the namservers and additionally 8.8.8.8 in my /etc/resolv.conf and it seems that the nameresolution works. I can't ping any remote adresses, neither via name nor via IP, but when I ping a name, the IP-adress is shown (even for sites which I didn't use for a long time, so they should not be in the cache.

The output of route is this one

Code:

thinkpad:~# route

Kernel IP routing table

Destination    Gateway        Genmask        Flags Metric Ref    Use Iface

default        *              0.0.0.0        U    0      0        0 ppp0

10.64.64.64    *              255.255.255.255 UH    0      0        0 ppp0

and a part of netstat -na

Code:

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address          Foreign Address        State      

tcp        0      0 0.0.0.0:37              0.0.0.0:*              LISTEN    

tcp        0      0 0.0.0.0:6000            0.0.0.0:*              LISTEN    

tcp        0      0 0.0.0.0:113            0.0.0.0:*              LISTEN    

tcp        0      0 0.0.0.0:22              0.0.0.0:*              LISTEN    

tcp        0      0 127.0.0.1:631          0.0.0.0:*              LISTEN    

tcp6      0      0 :::6000                :::*                    LISTEN    

tcp6      0      0 :::22                  :::*                    LISTEN    

udp        0      0 0.0.0.0:512            0.0.0.0:*                          

udp        0      0 0.0.0.0:37              0.0.0.0:*                          

udp        0      0 0.0.0.0:631            0.0.0.0:*

It seems that I'm still missing something. I cannot browse any websites and Thunderbird (mail) doesn't work either. I can even not get websites via their IP.

What's wrong? Is the route for a Point-to-Point-connection valid?

Markus

Quote:

Originally Posted by markush (Post 4745965)

I seem to remember having to enable packet forwarding in the kernel. Perhaps this is your problem?

Well, I have enabled packet-forwarding now. But it occured another problem (which I had already once yesterday:

Code:

thinkpad:~# pppd call umts debug nodetach

AT

OK

AAT+CPIN=xxxx

OKScript /usr/sbin/chat -V -f /etc/ppp/umts.chat finished (pid 2071), status = 0x0

Serial connection established.

using channel 4

Using interface ppp0

Connect: ppp0 <--> /dev/ttyUSB0

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

LCP: timeout sending Config-Requests

Connection terminated.

Receive serial link is not 8-bit clean:

Problem: all had bit 7 set to 0

Modem hangup

^CTerminating on signal 2

There seems to be still a problem with the chat-script (referring to the Linux-ppp Howto http://tldp.org/HOWTO/PPP-HOWTO/x419.html)

Markus

Code:

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe786b39> <pcomp> <accomp>]

LCP: timeout sending Config-Requests

look at the 'passive' option

Quote:

Originally Posted by pppd(8)

passive
Enables the "passive" option in the LCP. With this option, pppd
will attempt to initiate a connection; if no reply is received
from the peer, pppd will then just wait passively for a valid
LCP packet from the peer, instead of exiting, as it would with‐
out this option.

Quote:

Only problem was that I still cannot connect to the internet. I've included the namservers and additionally 8.8.8.8 in my /etc/resolv.conf and it seems that the nameresolution works.

use 8.8.8.8 as the first entry, maybe iptables prevents you from accessing the internet. you could try to set all policies to 'accept' for testing purposes

The chat script that I use for my Huawei E160E USB modem is very similar to that which gezley posted. http://www.linuxquestions.org/questi...4/#post4213848
I used to use this all the time, until NetworkManager came into -current.
You should uncomment the line

Code:

#'OK' 'AT+cgdcont=1,"IP","internet.eplus.de"'

in your chat script as you need to specify the Access Point Name.

Do you see an interface created when you connect in the output of 'ifconfig'?
Also, when you connect the connection information is saved in /etc/ppp/resolv.conf, whereas programs will look at /etc/resolv.conf. You said that you have created a symlink from /etc/ppp/resolv.conf to /etc/resolv.conf, but I have not tested this technique. I always used to manually copy /etc/ppp/resolv.conf to /etc/resolv.conf once the connection was made.