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RE: [Openvpn-users] More thoughts on redirect-gateway


  • Subject: RE: [Openvpn-users] More thoughts on redirect-gateway
  • From: James Yonan <jim@xxxxxxxxx>
  • Date: Thu, 20 Jan 2005 12:44:03 -0700 (MST)

On Thu, 20 Jan 2005, Andrew Alston wrote:

> Hi,
> 
> I've pasted the output of an openvpn --show-net below, dunno if this
> will give you any better indication.  Using the --route-method exe
> worked perfectly, thanks a million for the help

I need to know a few more things:

* the IP/netmask/gateway of the route which failed

* the interface ID which OpenVPN tried to use when adding the route with 
the IP helper API

* the correct interface ID which it should have used

James

> 
> SYSTEM ROUTING TABLE
> 0.0.0.0 0.0.0.0 165.146.141.42 p=0 i=131077 t=3 pr=3 a=95 h=0
> m=1/-1/-1/-1/-1
> 10.0.0.0 255.0.0.0 10.0.0.1 p=0 i=2 t=3 pr=2 a=122 h=0 m=20/-1/-1/-1/-1
> 10.0.0.1 255.255.255.255 127.0.0.1 p=0 i=1 t=3 pr=2 a=122 h=0
> m=20/-1/-1/-1/-1
> 10.255.255.255 255.255.255.255 10.0.0.1 p=0 i=2 t=3 pr=2 a=122 h=0
> m=20/-1/-1/-1/-1
> 127.0.0.0 255.0.0.0 127.0.0.1 p=0 i=1 t=3 pr=2 a=122 h=0 m=1/-1/-1/-1/-1
> 165.146.128.1 255.255.255.255 165.146.141.42 p=0 i=131077 t=3 pr=3 a=95
> h=0 m=1/-1/-1/-1/-1
> 165.146.141.42 255.255.255.255 127.0.0.1 p=0 i=1 t=3 pr=2 a=95 h=0
> m=50/-1/-1/-1/-1
> 165.146.255.255 255.255.255.255 165.146.141.42 p=0 i=131077 t=3 pr=2
> a=95 h=0 m=50/-1/-1/-1/-1
> 224.0.0.0 240.0.0.0 10.0.0.1 p=0 i=2 t=3 pr=2 a=122 h=0 m=20/-1/-1/-1/-1
> 224.0.0.0 240.0.0.0 165.146.141.42 p=0 i=131077 t=3 pr=3 a=95 h=0
> m=1/-1/-1/-1/-1
> 255.255.255.255 255.255.255.255 10.0.0.1 p=0 i=2 t=3 pr=2 a=122 h=0
> m=1/-1/-1/-1/-1
> 255.255.255.255 255.255.255.255 10.0.0.1 p=0 i=3 t=3 pr=2 a=122 h=0
> m=1/-1/-1/-1/-1
> SYSTEM ADAPTER LIST
> TAP-Win32 Adapter V8 - Packet Scheduler Miniport
>   Index = 3
>   GUID = {C15A65EF-886C-4AA5-B66F-09707776D28D}
>   IP = 0.0.0.0/0.0.0.0 
>   MAC = 00:ff:c1:5a:65:ef
>   GATEWAY =  
>   DHCP SERV = 137.158.120.45 
>   DHCP LEASE OBTAINED = Thu Jan 20 19:18:17 2005
>   DHCP LEASE EXPIRES  = Fri Jan 20 19:18:17 2006
> Intel(R) PRO/100 VE Network Connection - Packet Scheduler Miniport
>   Index = 2
>   GUID = {62DF4C0C-9875-4E86-B98B-01DBEE8D8FDB}
>   IP = 10.0.0.1/255.0.0.0 
>   MAC = 00:0c:76:b8:29:8d
>   GATEWAY =  
> WAN (PPP/SLIP) Interface
>   Index = 131077
>   GUID = {9224E6AE-C4E8-4393-9729-14B400D0FA43}
>   IP = 165.146.141.42/255.255.255.255 
>   MAC = 00:53:45:00:00:00
>   GATEWAY = 165.146.141.42/0.0.0.0
> 
> 
> -----Original Message-----
> From: James Yonan [mailto:jim@xxxxxxxxx] 
> Sent: Thursday, January 20, 2005 8:08 PM
> To: Andrew Alston
> Cc: openvpn-users@xxxxxxxxxxxxxxxxxxxxx
> Subject: Re: [Openvpn-users] More thoughts on redirect-gateway
> 
> 
> On Thu, 20 Jan 2005, Andrew Alston wrote:
> 
> > As referring to my previous email about redirect-gateway, I'm
> wondering
> > if its trying to insert an interface id when it tries to create that
> > route, and because the route is going to a gateway that's not the
> > Ethernet interface (it's the ppp interface for my pppoe over adsl),
> its
> > specifying the wrong interface id in the code and getting the route
> > wrong and thereby breaking.
> > 
> > Hrmmm its weird, because all the other route additions work except for
> > that first step where it tries to insert the route to the vpn server
> for
> > route loop avoidance.
> > 
> > Anyone ever tried using redirect gateway under windows xp when the
> > initial connection was a ppp or pppoe connection? And anyone have any
> > success with this?
> 
> Try --route-method exe.  This will use the route command as opposed to 
> calling the IP helper API which will factor out the possibility that 
> OpenVPN is using the wrong interface ID.
> 
> There have been other reports of --route-method ipapi failing when RRAS
> is 
> being used.  It would be useful to see an "openvpn --show-net" before 
> the tunnel is started and contrast that against the interface ID which 
> OpenVPN thinks the default gateway belongs to.  This may be a bug.
> 
> James
> 
> 

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