[Openvpn-users] Cannot allocate TUN/TAP dev dynamically

[Tim W. <ti...@th...>]

Hi,=20
I'm trying to make a VPN connection from openvpn 2.0.9 on RHL7 to openvpn=20
2.0.7 on CentOS 4.4. I've attempted to follow the instructions from=20
http://openvpn.net/howto.html#quick

The CentOS box is the server in my environment and the RHL7 box is the clie=
nt.=20
I created the server keys and the client keys on the CentOS box and scp'd t=
he=20
client keys to the RHL7 box.

I can start the server on the CentOS box and sorta get a connection from th=
e=20
RHL7 client. This is the text of the output when running=20
# openvpn  /etc/openvpn/server.conf
Tue Jan  9 15:17:31 2007 OpenVPN 2.0.7 i386-redhat-linux-gnu [SSL] [LZO]=20
[EPOLL] built on Apr 29 2006
Tue Jan  9 15:17:31 2007 Diffie-Hellman initialized with 1024 bit key
Tue Jan  9 15:17:31 2007 TLS-Auth MTU parms [ L:1544 D:140 EF:40 EB:0 ET:0=
=20
EL:0 ]
Tue Jan  9 15:17:31 2007 TUN/TAP device tun0 opened
Tue Jan  9 15:17:31 2007 /sbin/ip link set dev tun0 up mtu 1500
Tue Jan  9 15:17:31 2007 /sbin/ip addr add dev tun0 local 10.8.0.1 peer=20
10.8.0.2Tue Jan  9 15:17:31 2007 /sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Tue Jan  9 15:17:31 2007 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:13=
5=20
ET:0 EL:0 AF:3/1 ]
Tue Jan  9 15:17:31 2007 GID set to nobody
Tue Jan  9 15:17:31 2007 UID set to nobody
Tue Jan  9 15:17:31 2007 Listening for incoming TCP connection on [undef]:1=
194
Tue Jan  9 15:17:31 2007 TCPv4_SERVER link local (bound): [undef]:1194
Tue Jan  9 15:17:31 2007 TCPv4_SERVER link remote: [undef]
Tue Jan  9 15:17:31 2007 MULTI: multi_init called, r=3D256 v=3D256
Tue Jan  9 15:17:31 2007 IFCONFIG POOL: base=3D10.8.0.4 size=3D62
Tue Jan  9 15:17:31 2007 IFCONFIG POOL LIST
Tue Jan  9 15:17:31 2007 ServerName,10.8.0.4
Tue Jan  9 15:17:31 2007 MULTI: TCP INIT maxclients=3D1024 maxevents=3D1028
Tue Jan  9 15:17:31 2007 Initialization Sequence Completed


# egrep -v "^(#|*$|;)" server.conf
port 1194
proto tcp
dev tun
ca /etc/openvpn/easy-rsa/keys/ca.crt
cert /etc/openvpn/easy-rsa/keys/server.crt
key /etc/openvpn/server.key  # This file should be kept secret
dh /etc/openvpn/easy-rsa/keys/dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
client-to-client
keepalive 10 120
comp-lzo
user nobody
group nobody
persist-key
persist-tun
status openvpn-status.log
verb 3



and when running
# openvpn ./client.conf
Tue Jan  9 14:54:14 2007 VERIFY OK:=20
depth=3D0, /C=3DUS/ST=3DNA/O=3DOrgName/CN=3DCommonName/Ema...@e-...
Tue Jan  9 14:54:14 2007 Data Channel Encrypt: Cipher 'BF-CBC' initialized=
=20
with 128 bit key
Tue Jan  9 14:54:14 2007 Data Channel Encrypt: Using 160 bit message=20
hash 'SHA1' for HMAC authentication
Tue Jan  9 14:54:14 2007 Data Channel Decrypt: Cipher 'BF-CBC' initialized=
=20
with 128 bit key
Tue Jan  9 14:54:14 2007 Data Channel Decrypt: Using 160 bit message=20
hash 'SHA1' for HMAC authentication
Tue Jan  9 14:54:14 2007 Control Channel: TLSv1, cipher TLSv1/SSLv3=20
EDH-RSA-DES-CBC3-SHA, 1024 bit RSA
Tue Jan  9 14:54:14 2007 [ServerName] Peer Connection Initiated with=20
192.168.1.252:1194
Tue Jan  9 14:54:15 2007 SENT CONTROL [ServerName]: 'PUSH_REQUEST'=20
(status=3D1)Tue Jan  9 14:54:15 2007 PUSH: Received control=20
message: 'PUSH_REPLY,route 10.8.0.0 255.255.255.0,ping 10,ping-restart=20
120,ifconfig 10.8.0.6 10.8.0.5'
Tue Jan  9 14:54:15 2007 OPTIONS IMPORT: timers and/or timeouts modified
Tue Jan  9 14:54:15 2007 OPTIONS IMPORT: --ifconfig/up options modified
Tue Jan  9 14:54:15 2007 OPTIONS IMPORT: route options modified
Tue Jan  9 14:54:15 2007 Cannot allocate TUN/TAP dev dynamically
Tue Jan  9 14:54:15 2007 Exiting

# egrep -v "^(#|*$|;)" client.conf
client
dev tun
proto tcp
remote serverDomain 1194
resolv-retry infinite
nobind
user nobody
group nobody
persist-key
persist-tun
ca /etc/openvpn/clientkeys/ca.crt
cert /etc/openvpn/clientkeys/client.crt
key /etc/openvpn/clientkeys/client.key
comp-lzo
verb 3

What am I missing?

Thanks,=20
Tim

=2D-=20
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