[plug] Routing over a VPN link?

Jason Nicholls jason at mindsocket.com.au
Thu Dec 28 15:29:17 WST 2006


Hey Andrew,

> I have a weird problem with a remote system I'm connecting to
> (standard chap PPTP VPN, no MPPE). I'm using sarge, and the VPN
> connects, receives IP addresses, etc, but for some reason I don't get
> any response to any connection attempts through it. I've tried both
> the remote end as reported from ifconfig, as well as another machine
> on that network which I know exists.
> 
> The weird part is, it does work fine under XP :-/  I've attached
> i[fp]config and route output for both machines. The existing remote
> machine I'm ultimately trying to get to is 192.168.1.2, hence the
> static route added under Linux. The XP output has a lot of extra
> routing for things like vmware, other VPN clients, etc - just ignore
> them :)
> 
> Any ideas?

looks like you probably have to setup a route for either 192.168.1.2 or
the entire 192.168.1.0/24 with an appropriate gateway specified (not
just interface ppp0).

Perhaps try something like (after ppp0 is up), and I can't test myself sorry:

route add -host 192.168.1.2 gw 192.168.1.249

gw should be the other end of the ppp link.




> 
> Andrew
> 
> -- 
> Linux supports the notion of a command line or a shell for the same
> reason that only children read books with only pictures in them.
> Language, be it English or something else, is the only tool flexible
> enough to accomplish a sufficiently broad range of tasks.
>                          -- Bill Garrett

> eth0      Link encap:Ethernet  HWaddr 00:0C:29:5F:8C:68  
>           inet addr:192.168.73.151  Bcast:192.168.73.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:54076 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:49102 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:7581654 (7.2 MiB)  TX bytes:43357140 (41.3 MiB)
>           Interrupt:18 Base address:0x1080 
> 
> lo        Link encap:Local Loopback  
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:889 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:889 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:203736 (198.9 KiB)  TX bytes:203736 (198.9 KiB)
> 
> ppp0      Link encap:Point-to-Point Protocol  
>           inet addr:192.168.1.224  P-t-P:192.168.1.249  Mask:255.255.255.255
>           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
>           RX packets:5 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1026 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:3 
>           RX bytes:62 (62.0 b)  TX bytes:85826 (83.8 KiB)
> 

> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.1.2     0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
> 192.168.1.249   0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
> 192.168.73.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 0.0.0.0         192.168.73.1    0.0.0.0         UG    0      0        0 eth0

> 
> Windows IP Configuration
> 
>         Host Name . . . . . . . . . . . . : martinpc
>         Primary Dns Suffix  . . . . . . . : cls.coslog.com
>         Node Type . . . . . . . . . . . . : Broadcast
>         IP Routing Enabled. . . . . . . . : No
>         WINS Proxy Enabled. . . . . . . . : No
>         DNS Suffix Search List. . . . . . : cls.coslog.com
> 
> Ethernet adapter VMware Network Adapter VMnet8:
> 
>         Connection-specific DNS Suffix  . : 
>         Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet8
>         Physical Address. . . . . . . . . : 00-50-56-C0-00-08
>         Dhcp Enabled. . . . . . . . . . . : No
>         IP Address. . . . . . . . . . . . : 192.168.91.1
>         Subnet Mask . . . . . . . . . . . : 255.255.255.0
>         Default Gateway . . . . . . . . . : 
> 
> Ethernet adapter VMware Network Adapter VMnet1:
> 
>         Connection-specific DNS Suffix  . : 
>         Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet1
>         Physical Address. . . . . . . . . : 00-50-56-C0-00-01
>         Dhcp Enabled. . . . . . . . . . . : No
>         IP Address. . . . . . . . . . . . : 192.168.221.1
>         Subnet Mask . . . . . . . . . . . : 255.255.255.0
>         Default Gateway . . . . . . . . . : 
> 
> Ethernet adapter Local Area Connection:
> 
>         Connection-specific DNS Suffix  . : 
>         Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
>         Physical Address. . . . . . . . . : 00-0F-FE-08-7C-8E
>         Dhcp Enabled. . . . . . . . . . . : No
>         IP Address. . . . . . . . . . . . : 192.168.73.138
>         Subnet Mask . . . . . . . . . . . : 255.255.255.0
>         Default Gateway . . . . . . . . . : 192.168.73.1
>         DNS Servers . . . . . . . . . . . : 192.168.73.11
> 
> Ethernet adapter Local Area Connection 6:
> 
>         Media State . . . . . . . . . . . : Media disconnected
>         Description . . . . . . . . . . . : TAP-Win32 Adapter V8
>         Physical Address. . . . . . . . . : 00-FF-74-0A-E7-D3
> 
> PPP adapter AKA - Chatree Gold Akara:
> 
>         Connection-specific DNS Suffix  . : 
>         Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
>         Physical Address. . . . . . . . . : 00-53-45-00-00-00
>         Dhcp Enabled. . . . . . . . . . . : No
>         IP Address. . . . . . . . . . . . : 192.168.1.224
>         Subnet Mask . . . . . . . . . . . : 255.255.255.255
>         Default Gateway . . . . . . . . . : 
>         DNS Servers . . . . . . . . . . . : 192.168.1.249

> ===========================================================================
> Interface List
> 0x1 ........................... MS TCP Loopback interface
> 0x2 ...00 50 56 c0 00 08 ...... VMware Virtual Ethernet Adapter for VMnet8
> 0x3 ...00 50 56 c0 00 01 ...... VMware Virtual Ethernet Adapter for VMnet1
> 0x4 ...00 0f fe 08 7c 8e ...... Broadcom NetXtreme Gigabit Ethernet - Packet Scheduler Miniport
> 0x5 ...00 ff 74 0a e7 d3 ...... TAP-Win32 Adapter V8 - Packet Scheduler Miniport
> 0x20007 ...00 53 45 00 00 00 ...... WAN (PPP/SLIP) Interface
> ===========================================================================
> ===========================================================================
> Active Routes:
> Network Destination        Netmask          Gateway       Interface  Metric
>           0.0.0.0          0.0.0.0     192.168.73.1  192.168.73.138	  20
>        10.0.0.100  255.255.255.255     192.168.73.1  192.168.73.138	  1
>         127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1	  1
>       192.168.0.6  255.255.255.255     192.168.73.1  192.168.73.138	  1
>       192.168.1.0    255.255.255.0    192.168.1.224   192.168.1.224	  1
>     192.168.1.224  255.255.255.255        127.0.0.1       127.0.0.1	  50
>     192.168.1.255  255.255.255.255    192.168.1.224   192.168.1.224	  50
>      192.168.8.50  255.255.255.255     192.168.73.1  192.168.73.138	  1
>      192.168.73.0    255.255.255.0   192.168.73.138  192.168.73.138	  20
>    192.168.73.138  255.255.255.255        127.0.0.1       127.0.0.1	  20
>    192.168.73.255  255.255.255.255   192.168.73.138  192.168.73.138	  20
>      192.168.91.0    255.255.255.0     192.168.91.1    192.168.91.1	  20
>      192.168.91.1  255.255.255.255        127.0.0.1       127.0.0.1	  20
>    192.168.91.255  255.255.255.255     192.168.91.1    192.168.91.1	  20
>     192.168.221.0    255.255.255.0    192.168.221.1   192.168.221.1	  20
>     192.168.221.1  255.255.255.255        127.0.0.1       127.0.0.1	  20
>   192.168.221.255  255.255.255.255    192.168.221.1   192.168.221.1	  20
>      210.4.148.98  255.255.255.255     192.168.73.1  192.168.73.138	  1
>     216.239.63.19  255.255.255.255     192.168.73.1  192.168.73.138	  1
>   218.214.163.231  255.255.255.255     192.168.73.1  192.168.73.138	  1
>         224.0.0.0        240.0.0.0    192.168.1.224   192.168.1.224	  50
>         224.0.0.0        240.0.0.0   192.168.73.138  192.168.73.138	  20
>         224.0.0.0        240.0.0.0     192.168.91.1    192.168.91.1	  20
>         224.0.0.0        240.0.0.0    192.168.221.1   192.168.221.1	  20
>   255.255.255.255  255.255.255.255    192.168.1.224               5	  1
>   255.255.255.255  255.255.255.255   192.168.73.138  192.168.73.138	  1
>   255.255.255.255  255.255.255.255     192.168.91.1    192.168.91.1	  1
>   255.255.255.255  255.255.255.255    192.168.221.1   192.168.221.1	  1
> Default Gateway:    192.168.73.1
> ===========================================================================
> Persistent Routes:
>   None

> _______________________________________________
> PLUG discussion list: plug at plug.org.au
> http://www.plug.org.au/mailman/listinfo/plug
> Committee e-mail: committee at plug.linux.org.au

Regards,

Jason Nicholls
--------------------------------------------------------------------
Jason Nicholls                     email: <jason at mindsocket.com.au>
http://jason.mindsocket.com.au/     cell: 206 310 4239 (US)
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