0
votes
1answer
32 views

TCP RST from telnet/ssh daemons when connecting from openvpn

I have LAN_1 and LAN_2 interconnected with an openvpn tunnel terminated ona pair of SOHO routers running busybox. One of the vpn purpose is to allow clients on both LAN_1 and LAN_2, to administer the ...
0
votes
0answers
47 views

customised client to client connection configuration inside OpenVPN server

I have two clients with common names [client_sina] and [client_extra] that are connecting to an OpenVPN server on remote place via (TUN21) running on Tomato Router The only physical port of the ...
2
votes
1answer
559 views

iptables: access connected openvpn client from the LAN with the VPN server

I have what is essentially a routing problem, and I'm not familiar enough with routing and iptables to effectively troubleshoot and set up my network needs. What's working I have an openVPN network ...
0
votes
0answers
60 views

virtual NIC, local routing and linux kernel routing table

from this article: http://backreference.org/2010/03/26/tuntap-interface-tutorial/ the author created a tun interface # openvpn --mktun --dev tun2 # ip link set tun2 up # ip addr add 10.0.0.1/24 dev ...
0
votes
1answer
37 views

bridge on openVPN client

I have some problem with setting up what i call a "remote entry point" (i'm sure ther is a real name for this) First things First : Here is my setup : ...
4
votes
2answers
3k views

openvpn: connection established, can't ping server tun interface (debian server, windows & os x clients)

My goal: I want to set up openVPN on a vServer from the company netcup, running Debian squeeze. I only want a VPN connection from client to server; clients should not be able to see each other, also ...
2
votes
2answers
1k views

How can I configure openvpn to proxy traffic only for processes that bind to the tun interface?

I'm trying to configure openvpn so that only traffic from certain processes goes over the vpn, but those processes could connect to anywhere. I'm trying to do that by having openvpn not do any route ...
0
votes
1answer
1k views

How's the routing done in a very simple OpenVPN setup?

I've entirely configured (remotely) a Debian GNU/Linux dedicated server hosted in a professional capacity and I've got a network routing question (which AFAICT precisely fits the FAQ of serverfault). ...
1
vote
1answer
728 views

Route packets from one VPN to another

I have two OpenVPN servers (10.8.0.0 and 10.9.0.0) set up on my OpenSUSE server. Within one network, each computer is visible to any other one, but I'd like to make it so that computers are visible ...
6
votes
8answers
1k views

opvnvpn: addressing nodes in LAN-behinds

I've setup an openvpn server which i can access remotely, once it is connected, it creates a tun0 device on both server and client with virtual ip 10.15.119.x. the openvpn server is itself ...
0
votes
1answer
2k views

openvpn: after changing to server mode, client does not create TUN device

i had a previously working configuration with the config files used in a previous question However, i've changed this now to the following configuration using server mode, everything on the logs seem ...
0
votes
1answer
378 views

why tun interface in openvpn

can anyone tell me the use of tun interface in openvpn? as far as i read, it is used to tunnel all the traffic from the PC over the ssl tunnel. But incase of VPN, i suppose all the traffic initiated ...
2
votes
1answer
8k views

OpenVPN Cannot allocate TUN/TAP dev dynamically

OpenVPN clients work fine when they're started by /etc/init.d/openvpn for the first time, but they can't reconnect if the master server is restarted. This is the error I get in syslog: ...
3
votes
2answers
3k views

OpenVPN with iptables and a tun interface

With an openvpn tunnel that uses a tun device, what iptables rules allow the encapsulated traffic through and what rules control the packets after encapsulation? Basically, I am wondering how the ...
2
votes
3answers
15k views

OPENVPN error “Cannot open TUN/TAP dev /dev/net/tun: Permission denied (errno=13)”

Hi I get the following error when I try to run openvpn in my Ubuntu Server Fri Jan 8 02:12:59 2010 OpenVPN 2.1_rc11 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Mar 9 2009 Fri Jan 8 ...
0
votes
2answers
2k views

Cannot open TUN/TAP dev

Can someone please help me with this? I have a linux 2.6.9 server (I know it's outdated, but it has some special modules and so kernel cannot be updated/recompiled/etc), and I need to have a tun/tap ...
32
votes
5answers
47k views

Should I use tap or tun for openvpn?

What are the differences between using dev tap and dev tun for openvpn? I know the different modes cannot inter-operate. What is the technical differences, other then just layer 2 vs 3 operation. ...