Can't set up wvdial or dialup connection

[phelest]

... to verify the "primary and secondary DNS addresses" provided during dial-up:

peter@... ~ $ grep 'ppp' /var/log/syslog | cat -n
1 Feb 17 13:30:45 ... pppd[6459]: pppd 2.4.5 started by peter, uid 1000
2 Feb 17 13:30:45 ... pppd[6459]: Using interface ppp0
3 Feb 17 13:30:45 ... pppd[6459]: Connect: ppp0 <--> /dev/ttyS0
4 Feb 17 13:30:45 ... NetworkManager[772]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
5 Feb 17 13:30:45 ... NetworkManager[772]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
6 Feb 17 13:30:46 ... pppd[6459]: not replacing existing default route via 192.168.2.91
7 Feb 17 13:30:46 ... pppd[6459]: local IP address 149.225.130.41
8 Feb 17 13:30:46 ... pppd[6459]: remote IP address 139.4.249.10
9 Feb 17 13:30:46 ... pppd[6459]: primary DNS address 195.129.111.49
10 Feb 17 13:30:46 ... pppd[6459]: secondary DNS address 195.129.111.50
11 Feb 17 13:30:48 ... ntpd[1531]: Listen normally on 6 ppp0 149.225.130.41 UDP 123
12 Feb 17 13:31:15 ... pppd[6459]: Terminating on signal 15
13 Feb 17 13:31:15 ... pppd[6459]: Connect time 0.5 minutes.
14 Feb 17 13:31:15 ... pppd[6459]: Sent 0 bytes, received 0 bytes.
15 Feb 17 13:31:15 ... NetworkManager[772]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
16 Feb 17 13:31:17 ... ntpd[1531]: Deleting interface #6 ppp0, 149.225.130.41#123, interface stats: received=0, sent=0, dropped=0, active_time=29 secs

17 Feb 17 13:47:24 ... pppd[6881]: pppd 2.4.5 started by peter, uid 1000
18 Feb 17 13:47:24 ... NetworkManager[772]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
19 Feb 17 13:47:24 ... NetworkManager[772]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
20 Feb 17 13:47:24 ... pppd[6881]: Using interface ppp0
21 Feb 17 13:47:24 ... pppd[6881]: Connect: ppp0 <--> /dev/ttyS0
22 Feb 17 13:47:24 ... pppd[6881]: not replacing existing default route via 192.168.2.91
23 Feb 17 13:47:24 ... pppd[6881]: local IP address 149.225.132.63
24 Feb 17 13:47:24 ... pppd[6881]: remote IP address 139.4.249.11
25 Feb 17 13:47:24 ... pppd[6881]: primary DNS address 195.129.111.50
26 Feb 17 13:47:24 ... pppd[6881]: secondary DNS address 195.129.111.49
27 Feb 17 13:47:26 ... ntpd[1531]: Listen normally on 7 ppp0 149.225.132.63 UDP 123
28 Feb 17 13:50:00 ... pppd[6881]: Terminating on signal 15
29 Feb 17 13:50:00 ... pppd[6881]: Connect time 2.6 minutes.
30 Feb 17 13:50:00 ... pppd[6881]: Sent 0 bytes, received 92 bytes.
31 Feb 17 13:50:00 ... NetworkManager[772]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
32 Feb 17 13:50:02 ... ntpd[1531]: Deleting interface #7 ppp0, 149.225.132.63#123, interface stats: received=0, sent=0, dropped=0, active_time=156 secs
peter@... ~ $

[phelest]

also very helpful:
https://help.ubuntu.com/community/Dialu ... tUpDialer/

[phelest]

How it should work with DNS entries according to my understanding:
/etc/ppp/ip-up.d: should adapt the DNS entries in case the ppp dial-up was successful = add additonal or replace DNS entries into "/etc/resolv.conf".
/etc/ppp/ip-down.d: should change back "/etc/resolv.conf" to the original settings (before the ppp dial-up was started) in case dial-up has been terminated.
- but this is not implemented correctly !

[phelest]

peter@... /etc $ man pppd | perl -ane'if(/usepeerdns/){$p=6}; printf "%2d $_",$p-- if $p;'

6 usepeerdns
5 Ask the peer for up to 2 DNS server addresses. The addresses supplied by the peer (if any) are passed to the /etc/ppp/ip-up
4 script in the environment variables DNS1 and DNS2, and the environment variable USEPEERDNS will be set to 1. In addition,
3 pppd will create an /etc/ppp/resolv.conf file containing one or two nameserver lines with the address(es) supplied by the
2 peer.
1

peter@... /etc $

I'm already still a long time struggling with that "/etc/ppp/ip-up" script mentioned above ... and how that would work correctly :

peter@... ~ $ ls -lR /etc/ppp/ | cat -n

1 /etc/ppp/:
2 total 76
3 -rw------- 1 root root 80 Apr 25 2012 chap-secrets
4 -rwxr-xr-x 1 root root 1754 Feb 4 2011 ip-down
5 drwxr-xr-x 2 root root 4096 Nov 5 22:59 ip-down.d
6 -rwxr-xr-x 1 root root 1892 Feb 4 2011 ip-up
7 drwxr-xr-x 2 root root 4096 Nov 5 22:59 ip-up.d
8 -rwxr-xr-x 1 root root 784 Feb 4 2011 ipv6-down
9 drwxr-xr-x 2 root root 4096 Feb 4 2011 ipv6-down.d
10 -rwxr-xr-x 1 root root 922 Feb 4 2011 ipv6-up
11 drwxr-xr-x 2 root root 4096 Feb 4 2011 ipv6-up.d
12 -rw-r--r-- 1 root root 13487 Feb 4 2011 options
13 -rw-r--r-- 1 root root 1759 Oct 15 2010 options.pptp
14 -rw------- 1 root root 1628 Apr 25 2012 pap-secrets
15 drwxr-s--- 2 root dip 4096 Feb 12 22:37 peers
16 -rwxr-xr-x 1 root root 137 Feb 4 2011 pppoe_on_boot
17 drwxr-xr-x 2 root root 4096 Dec 13 2011 resolv
18 -rw-r--r-- 1 root peter 52 Feb 17 13:47 resolv.conf
19
20 /etc/ppp/ip-down.d:
21 total 12
22 -rwxr-xr-x 1 root root 581 Feb 4 2011 0000usepeerdns
23 -rwxr-xr-x 1 root root 486 Sep 8 00:05 000resolvconf
24 -rwxr-xr-x 1 root root 2204 Dec 13 2011 0dns-down
25
26 /etc/ppp/ip-up.d:
27 total 12
28 -rwxr-xr-x 1 root root 902 Feb 4 2011 0000usepeerdns
29 -rwxr-xr-x 1 root root 515 Sep 8 00:05 000resolvconf
30 -rwxr-xr-x 1 root root 4024 Dec 13 2011 0dns-up
31
32 /etc/ppp/ipv6-down.d:
33 total 0
34
35 /etc/ppp/ipv6-up.d:
36 total 0
37
38 /etc/ppp/peers:
39 total 16
40 -rw-r----- 1 root dip 2141 Jul 22 2011 dsl-provider
41 -rw-r----- 1 root dip 1093 Apr 25 2012 provider
42 -rw-r--r-- 1 root root 30 Mar 10 2012 wvdial
43 -rw-r--r-- 1 root root 75 Mar 10 2012 wvdial-pipe
44
45 /etc/ppp/resolv:
46 total 0

peter@... ~ $

The most easiest workaround seems to be:

Code: Select all

sudo  cp  /etc/ppp/resolv.conf  /etc/resolv.conf


( updated with a POTS modem PPP dial-up using "Gnome-PPP" in LinuxMint 13 Maya MATE )

[phelest]

Once you have another dial-up active (ping to an IP address is ok, but DNS is still missing) then you can find out
the returned connection relevant DNS IP addresses (related to usepeerdns - listed by connection time) via

Code: Select all

grep  'DNS address'  /var/log/syslog


peter@... ~ $ grep 'DNS address' /var/log/syslog
Feb 17 13:30:46 ... pppd[6459]: primary DNS address 195.129.111.49
Feb 17 13:30:46 ... pppd[6459]: secondary DNS address 195.129.111.50
Feb 17 13:47:24 ... pppd[6881]: primary DNS address 195.129.111.50
Feb 17 13:47:24 ... pppd[6881]: secondary DNS address 195.129.111.49
Feb 17 20:00:50 ... pppd[9112]: primary DNS address 195.129.111.49
Feb 17 20:00:50 ... pppd[9112]: secondary DNS address 195.129.111.50
peter@... ~ $

[phelest]

... these both need to be found here then :
The 1st was available at my system, but the 2nd not - but just copying from .../ppp/... to the other directory (as mentioned above) did the job:

peter@... ~ $ more /etc/ppp/resolv.conf # was available
nameserver 195.129.111.49
nameserver 195.129.111.50
peter@... ~ $ more /etc/resolv.conf # was missing, but file above was MANUALLY copied to here !
nameserver 195.129.111.49
nameserver 195.129.111.50
peter@... ~ $

[phelest]

My list of what can be checked:

1. Does the application Gnome-PPP start up (without activating anything further - needs to be installed first) ?
2. Can Gnome-PPP successfully test your POTS dial-up modem (Setup -> Detect -> some modem LEDs are flickering during the test) ?
3. Does Gnome-PPP connect successfully to your ISP (open and capture the LOG during the start-up of the dial-up !!!) ?
4. Open a new terminal now - can you successfully ping all 4 of the given IP addresses in that output of the Gnome-PPP LOG ?
like:
--> local IP address 149.225.178.186
--> remote IP address 139.4.249.12
--> primary DNS address 195.129.111.49
--> secondary DNS address 195.129.111.50
5. Does further connectivity fail due to the usage of names in the browser instead of using IP addresses (because DNS is missing) ?

... close Gnome-PPP ... then:
6. Did you do AT&F at your modem and save that to the active modem bank - to try at least the default modem settings ?
7. Do you know the exact modem parameters, AT commands and Init-Strings to be used (check the modem logfile in another OS if it is working there) ?
8. You can very easily check all AT commands and settings of the modem with the "Serial port terminal" (needs to be installed first) !

9. Do you need to use a dial-out digit ("0") to get from an internal to the external POTS (analogue telephone network) ?
10. Have you tried to skip the "dialtone"/"no dialtone" detection ?
11. Have you tried to use PAUSE at dedicated steps ?