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nyk
Guru
Joined: 28 Aug 2004
Posts: 527
Location: Bern (Switzerland)
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 Posted: Fri Oct 10, 2008 11:47 am Post subject: Modem ppp connect DNS problem |
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I used to connect to the net by using a Swisscom PCMCIA card modem and it worked using ppp. Now it suddently stops working. The only reason I can think of is because I installed and removed (after it didn't work) umtsmon. Now it seems to connect successfully as usual, but when I try "ssh some_host", I get a "temporary failure in domain name resolution" error. I checked /etc/resolv.conf and it's empty. But even adding some open DNS servers I know to work to the list didn't help.
Here is the output from pppd: | Code: |
Created /dev/ppp device node
--> WvDial: Internet dialer version 1.60
--> Initializing modem.
--> Sending: ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","gprs.swisscom.ch"
OK
--> Modem initialized.
--> Sending: ATDT*99***1#
--> Waiting for carrier.
CONNECT 7200000
--> Carrier detected. Waiting for prompt.
--> Don't know what to do! Starting pppd and hoping for the best.
Serial connection established.
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB0
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x4a81717f>]
rcvd [LCP ConfReq id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0x65b60b03> <pcom
p> <accomp>]
No auth is possible
sent [LCP ConfRej id=0x0 <auth chap MD5> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x4a81717f>]
rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x65b60b03>]
sent [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x65b60b03>]
sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
rcvd [LCP DiscReq id=0x2 magic=0x65b60b03]
rcvd [LCP ProtRej id=0x3 80 fd 01 01 00 0c 1a 04 78 00 18 04 78 00]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
rcvd [IPCP ConfNak id=0x1 <ms-dns1 10.11.12.13> <ms-dns3 10.11.12.14>]
sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns3 10.11.12
.14>]
rcvd [IPCP ConfNak id=0x2 <ms-dns1 10.11.12.13> <ms-dns3 10.11.12.14>]
sent [IPCP ConfReq id=0x3 <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns3 10.11.12
.14>]
rcvd [IPCP ConfNak id=0x3 <ms-dns1 10.11.12.13> <ms-dns3 10.11.12.14>]
sent [IPCP ConfReq id=0x4 <addr 0.0.0.0> <ms-dns1 10.11.12.13> <ms-dns3 10.11.12
.14>]
rcvd [IPCP ConfReq id=0x0]
sent [IPCP ConfNak id=0x0 <addr 0.0.0.0>]
rcvd [IPCP ConfNak id=0x4 <addr 10.122.95.130> <ms-dns1 138.188.101.186> <ms-dns
3 138.188.101.189>]
sent [IPCP ConfReq id=0x5 <addr 10.122.95.130> <ms-dns1 138.188.101.186> <ms-dns
3 138.188.101.189>]
rcvd [IPCP ConfReq id=0x1]
sent [IPCP ConfAck id=0x1]
rcvd [IPCP ConfAck id=0x5 <addr 10.122.95.130> <ms-dns1 138.188.101.186> <ms-dns
3 138.188.101.189>]
Could not determine remote IP address: defaulting to 10.64.64.64
local IP address 10.122.95.130
remote IP address 10.64.64.64
primary DNS address 138.188.101.186
secondary DNS address 138.188.101.189
Script /etc/ppp/ip-up started (pid 6191)
Script /etc/ppp/ip-up finished (pid 6191), status = 0x0
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This is the ifconfig output afterwards: | Code: |
ppp0 Link encap:Point-to-Point Protocol
inet addr:10.122.95.130 P-t-P:10.64.64.64 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:8 errors:0 dropp]ed:0 overruns:0 frame:0
TX packets:29 errors:0 dropped:5 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:156 (156.0 B) TX bytes:3040 (2.9 KiB)
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This is my pppd config that used to work for my provider Swisscom: | Code: |
nodetach
show-password
connect "/usr/bin/wvdial --chat --config /etc/ppp/peers/swisscom-wvdial.conf swisscom"
disconnect "/etc/ppp/peers/gprs-disconnect-chat"
ttyUSB0
460800
crtscts # serial cable, Bluetooth and USB, on some occations with IrDA too
ipcp-accept-local
defaultroute
usepeerdns
novj
nobsdcomp
novjccomp
nopcomp
noaccomp
:192.168.255.1
ipcp-accept-remote
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And this is the wvdial config: | Code: |
[Dialer swisscom]
Modem = /dev/ttyUSB0
Baud = 460800
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CGDCONT=1,"IP","gprs.swisscom.ch"
ISDN = 0
Dial Command = ATDT
Modem Type = Analog
Phone = *99***1#
Username = gprs
Password = gprs
Carrier Check = yes
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I tried for hours changing many of these options, but no success. What could I do to make it work? |
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nyk
Guru
Joined: 28 Aug 2004
Posts: 527
Location: Bern (Switzerland)
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| Posted: Thu Nov 06, 2008 11:20 pm Post subject: |
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The problem is that DNS servers don't get added to /etc/resolv.conf by DHCP, as it did before the update that broke it.
I now use KPPP and specify the DNS servers in the connection-profile in there, so now it works again!
It was just hard to find out the DNS server IP addresses without access to the internet...  |
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dan2003
Apprentice
Joined: 11 May 2003
Posts: 258
Location: somewhere near london, UK
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| Posted: Wed Nov 26, 2008 1:01 pm Post subject: |
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I'm having this exact same problem.
I use dialup via my mobile phone in australia and it used to work wonderfully via kppp.
However since a lot of updates some months back i have had to kill dhcpcd and cat /etc/ppp/resolv.conf > /etc/resolv.conf everytome i connect - which is getting somewhat annoying. I've updated ppp further in an attempt to resolve the problem but it persists.
ppp version is now 2.4.4-r21
After looking in some script ( i fail to recall which) i saw reference to a resolv_conf binary/script which doesn't exist on my system, and is masked in portage. I have not tried to merge it yet but wonder if this would fix the issue.
_________________
Too easy! |
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