On Wed, 15 Dec 2004, Ferenc-Jan wrote:
I am having problems with 2.0 server (1.6/2.0 p2p work fine) between W2K
and Linux. Tunnel gets set up successfully (ping, smb works), but the w2k
routing table looks strange to me. The tunnel entries are:
192.168.4.1 255.255.255.255 192.168.4.5 192.168.4.6 1
192.168.4.4 255.255.255.252 192.168.4.6 192.168.4.6 1
192.168.4.6 255.255.255.255 127.0.0.1 127.0.0.1 1
The routing table above looks correct. Windows does not support true
Point-to-Point tunnels as the TAP driver is currently implemented, therefor
OpenVPN emulates this by using a /30 (255.255.255.252) subnet.
I'm lost here. When doing p2p (with 1.6 or 2.0) I get .4.0, .4.2 and .4.255
in the routing table. Where can I read up on this? I should probably do some
googling on routing, 'cause I still don't quite get it.
I don't think it's very well documented. The man page has some basic info
about it on the --ifconfig-pool option. Basically when you use this option
(with dev tun), the server takes the first /30 subnet, and the following
subnets are assigned to clients.
There was an in-depth discussion about this a few months ago here on the
list though, so you might find some interesting info if you search the
When you are assigned IP address 192.168.4.6, .5 is your gateway. .1 is
OpenVPN's IP address yes, but not on the /30 subnet that has been assigned
I tried out --redirect-gateway, but that added 192.168.4.5 as the default
gw, which obviously did't work.
That's what it should do.
Bloody silly me. I could not ping 192.168.4.5, so I never bothered to look
beyond the firewall. It was blocking outbound traffic from .4.0. Everything
works now. You've helped me a great deal (I've spent the weekend looking into
Yes, I find this a little odd too. I don't remember the rational behind
why ping's are not replied to on this address, but I'm sure James has some
good explaination for this!
Mathias Sundman (^) ASCII Ribbon Campaign
OpenVPN GUI for Windows X NO HTML/RTF in e-mail
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