Erich Titl wrote:
Niclas
Lists Soderlund.org wrote:
Hi,
I've setup a OpenVPN TUN-interface on a Debian-machine with all the
configuration working. The IP-adress of the tun0-device is 10.0.0.1.
Ive connected a WinXP-client to the server which gets an ip-adress of
10.0.0.6 with the default gateway of 10.0.0.5.
When I ping the 10.0.0.1 from the client I get a reply just fine. When
I ping the 10.0.0.6 from the server I also get a reply just fine.
All routes on the client seems fine, the default (0.0.0.0/0.0.0.0)
points to the correct place on the server-client-link. And traffic
(icmp) is obviously going over the link.
Now, when i try to surf or ping other hosts over the tunnel nothing
happens. I can see via tcpdump that the traffic actually gets to the
server, but then nothing.
What could be wrong? I know the detail of this email is HORRIBLE. But
honestly I dont know where to begin on the details, what configs to
attach, what debug to start and what codes to show.
Did you allow IP forwarding on the server?
cheers
Erich
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Hi!
Sorry for the late reply, I had to leave town for the weekend. Now, this
is what I get concerning the IP_forward:
server:~# cat /proc/sys/net/ipv4/ip_forward
1
server:~#
And this is the table of routes on the server when my client is connected:
server:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Iface
213.214.236.80 * 255.255.255.240 U eth0
10.0.0.0 * 255.255.255.0 U tap0
default 213.214.236.81 0.0.0.0 UG 0 eth0
server:~#
And finally this is the routingtable on the connected client:
x.x.x.x = eth0 (the only network IF on the server) = public IP
y.y.y.y = LAN (the only physical network IF on the client) = internal IP
10.0.0.0 = openvpn-network
10.0.0.4 = client IP
10.0.0.1 = server IP
C:\>route print
[snip]
=============================================================
Active Routes:
Net Destination Netmask Gateway Interface
0.0.0.0 0.0.0.0 10.0.0.1 10.0.0.4
10.0.0.0 255.255.255.0 10.0.0.4 10.0.0.4
10.0.0.4 255.255.255.255 127.0.0.1 127.0.0.1
10.255.255.255 255.255.255.255 10.0.0.4 10.0.0.4
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1
y.y.0.0 255.255.0.0 y.y.80.16 y.y.80.16
y.y.80.16 255.255.255.255 127.0.0.1 127.0.0.1
y.y.255.255 255.255.255.255 y.y.80.16 y.y.80.16
x.x.x.86 255.255.255.255 y.y.5.3 y.y.80.16
224.0.0.0 240.0.0.0 10.0.0.4 10.0.0.4
224.0.0.0 240.0.0.0 y.y.80.16 y.y.80.16
255.255.255.255 255.255.255.255 10.0.0.4 10.0.0.4
255.255.255.255 255.255.255.255 y.y.80.16 y.y.80.16
Default Gateway: 10.0.0.1
=============================================================
Persistent Routes:
None
C:\>
_Is_ there a route missing on the server-side so that the traffic that
has been send from the client, to some other destination than the server
itself, so the traffic cannot be send back to the client?
Regards,
Niclas
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