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Alexey
Asked: 2014-01-25 03:48:26 +0800 CST

PPTP defaultroute. Want to route all traffic via ppp interface

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I'm experiencing a problem described here: http://pptpclient.sourceforge.net/howto-diagnosis.phtml#lots_of_data. If I use defaultroute in peer conf or manually add 

route add default dev ppp0

there are tons of traffic in TX: in ifconfig so perhaps it loops somehow. I'd like to set it up so that I run pon ru and it automatically routes all non-local traffic through ppp0.

Here are my current configs.

  1. /etc/ppp/peers/ru:
connect /bin/true
plugin "/usr/local/lib/pppd/2.4.5/pptp.so"
pptp_server ru1.vpn.goldenfrog.com
user "username"
password "password"
noauth
nobsdcomp
nodeflate
remotename ru
ipparam ru
require-mppe-128
usepeerdns
nodefaultroute
persist
mtu 1528
mru 1528

  1. ip-up scripts: http://pastebin.com/7d4wAe3a

  2. ifplugd scripts: http://pastebin.com/e0NAsthY

  3. here is how routing looks like after pon ru :

root@raspberrypi:/home/pi# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         *               0.0.0.0         U     0      0        0 ppp0
192.168.39.81   *               255.255.255.255 UH    0      0        0 ppp0
192.168.178.0   *               255.255.255.0   U     0      0        0 eth0
  1. here is ifconfig after pon ru:
root@raspberrypi:/home/pi# ifconfig
eth0      Link encap:Ethernet  HWaddr b8:27:eb:19:c2:bb
          inet addr:192.168.178.35  Bcast:192.168.178.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:56356 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54433 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7269518 (6.9 MiB)  TX bytes:8972796 (8.5 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:962 errors:0 dropped:0 overruns:0 frame:0
          TX packets:962 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:83039 (81.0 KiB)  TX bytes:83039 (81.0 KiB)

ppp0      Link encap:Point-to-Point Protocol
          inet addr:31.6.12.130  P-t-P:192.168.39.81  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1396  Metric:1
          RX packets:6 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9436 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:84 (84.0 B)  TX bytes:13093786 (12.4 MiB)

wlan0     Link encap:Ethernet  HWaddr 00:c0:ca:72:6d:a4
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

root@raspberrypi:/home/pi# route

eth0 - my internal network interface going into AVM Frtiz!box router. wlan0 is not active at all. See huge numbers in TX in ppp0 which is the problem itself, this 12.4 mb is just a few seconds after the niterface is up.

UPDATE

Here is tcpdump output when I add default route thruogh ppp0: http://pastebin.com/7nUyLAex

linux

1 Answers

  1. /etc/ppp/peers/ru: there is a nodefaultroute parameter in this file. As far as I know, it needs to be defaultroute.

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