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Re: [Openvpn-users] Issue with TAP-Win32 adapter


  • Subject: Re: [Openvpn-users] Issue with TAP-Win32 adapter
  • From: "James Yonan" <jim@xxxxxxxxx>
  • Date: Tue, 2 Mar 2004 21:13:49 -0000

Paul Culmsee <Paul.Culmsee@xxxxxxxxx> said:

> I have seen an issue on Win2000/2003 with RRAS running. It may be
> something really dumb I'm doing.. But the TAP-Win32 adapter has 2 ip
> addresses immediately after installation. 
> 
> When starting the openvpn config I see the following in an ipconfig
> command..
> 
> Ethernet adapter SSHVPN:
> 
>    Connection-specific DNS Suffix  . :
>    IP Address. . . . . . . . . . . . : 10.3.0.1
>    Subnet Mask . . . . . . . . . . . : 255.255.255.252
>    IP Address. . . . . . . . . . . . : 0.0.0.0
>    Subnet Mask . . . . . . . . . . . : 0.0.0.0
>    Default Gateway . . . . . . . . . :
> 
> Then after a time it will get a 169 APIPA type address for the second
> IP.
> 
> This occurred whether I had the TCPIP properties of the interface set to
> DHCP vs a staticly assigned address.
> 
> Now I did the following and at some point it went away..
> 
> 1. Disabled RRAS
> (checked and problem still there. Killed the VPN and then reinitialized
> it - same prob)
> 2. Change the properties of the TAP interface from Application
> Controlled to Always Connected. Enabled the interface (it had a static
> address in TCPIP properties).
> 
> Now we have a single IP address. I reverted back to application
> controlled and it *still* has a single IP address
> 
> I re-enabled RRAS and its still happy. Rebooted and all ok.
> 
> Has anybody seen this behaviour?

This is a known problem with --ip-win32 ipapi (the default).

It is best fixed by using --ip-win32 dynamic (requires the latest 1.6 beta
release).

I expect that --ip-win32 dynamic will be the default by 1.6.0.

James



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