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Problem Creating a tun interfcae with SoftEther VPN Client on CentOS

I'm trying to make a VPN connection using SoftEther VPN Client on CentOS 7. When I try to create a new NIC, I get this error: VPN Client>NicCreate NicCreate command - Create New Virtual Network ...
2
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1answer
31 views

Please help me to understand these tun0 addresses

I have already done some searching and more or less understand what a tun0 interface does. I got the following from various sources, Packets sent by an operating system via a tun/tap device are ...
1
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0answers
28 views

It is possible to make an IPSEC VPN Bonding?

I wanted to know if It is possible to bound two IPSEC tunnels ? I've already done a VPN bonding of SSH tunnels, but It will be better if I use IPSEC.
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1answer
55 views

How do I tunnel traffic through a VPN and then through another machine

I recently started working from home using a laptop (A) that connects to a corporate network over a VPN. The VPN end point (B) on the corporate side then has two ports, 3389 for RDP and 22 for ssh, ...
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0answers
35 views

SFTP connect through an other server

I want to connect to my account in a server of my university. When I’m there I only have to do ssh user@FinalServer/home/user or create a folder using sftp://user@FinalServer/home/user But the ...
1
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1answer
108 views

Loading kernel modules that were compiled for another kernel failed

I want to load kernel modules, ip_gre.ko and gre.ko, on a embedded-device running embedded-linux to make that device to support GRE protocol. Since I do not want to change Embedded-linux device's ...
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1answer
49 views

Redirect traffic through the server

My task is to redirect traffic (port range) through the server. Here is the schema: Why NAT is not appropriate here: If NAT is set to "Tunnel Server", then all users will be assigned the same IP. ...
0
votes
1answer
60 views

GRE not Forwarding origin IP

I've followed the BuyVM Guide found here on creating a GRE Tunnel to protect my main server against DDOS attacks (http://wiki.buyvm.net/doku.php/gre_tunnel) I've followed through this whole guide ...
1
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1answer
33 views

Access network of PC2 from virtualbox installed on PC1

I am going to attend one seminar where I need to bring laptop with installed Virtualbox and Windows 7 running inside it. My laptop is too old to handle Virtualbox with Windows 7 and native Linux ...
2
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0answers
52 views

debugging iptables when tunneling one VPN through another

I seek to tunnel one SSL VPN (F5, running on my debian laptop==client) through another (OpenVPN, running on a debian linode==server), but lose all client networking (including, e.g., ping) after the ...
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0answers
64 views

Transparent proxy to other IP of thousand ports

I was bought a service that only allow a IP, the IP that i say, only one, but I need use this from more IP's. I think that I can install in this computer a system to do a transparent proxy for ...
1
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1answer
52 views

Resolving DNS through HTTP/HTTPS

Is there a way to resolve DNS through HTTP/HTTPS, the case was: my ISP redirecting every DNS request to their own DNS and poisoning the DNS records. all I need is a software that could resolve ...
2
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0answers
193 views

how to open up socks/SSH on different network interfaces?

iptables -A PREROUTING -i usb0 -t mangle -p tcp --dport 8080 -j MARK --set-mark 1 iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain ...
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1answer
76 views

Why does my tunneled IPv6 connectivity drop after a short period of time?

I correctly setup a Hurricane Electric tunnel on a CentOS 6.5 VPS server (KVM). I use CSF (ConfigServer Security & Firewall) which acts as a wrapper for iptables and ip6tables, the default ...
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0answers
89 views

Establish IPSEC Tunnel between two Ubuntu 12.04 PCs over LAN

I have two ubuntu 12.04 32 Bit PCs between which I want IPSec Tunnel to be setup. I have setup ipsec in both systems and ipsec verify runs fine on both. Since I have no prior experience of openswan, I ...
2
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1answer
640 views

Forwarding packets from loopback interface with policy-based routing

I have the following iptables rule: iptables -t mangle -A PREROUTING -p udp -m udp --dport 10000 -j MARK --set-xmark 0x4/0xffffffff which sets fwmark 4 on all udp packets with destination port ...
1
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1answer
654 views

VNC & SSH : local (win-putty) -> hop (linux) -> remote (linux)

I'm gettin a headache trying to access a remote VLC & SSH. This is the situation : Local : Win box behind NAT, dynamic IP. I want to connect from here. Hop : Linux box, static IP server Remote ...
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0answers
69 views

How to get information from sshd about established remote tunnels

I have a server running on which from many different places people log on via ssh and open remote ssh-tunnels to other places behind different firewalls. Now I want to try to get an overview, which ...
1
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1answer
497 views

Bridged TAP interface to virtualbox

I need bridged TAP interface on client side of my VPN to virtual machine. I use VirtualBox 4.3.12. But in Adapter Network options in Attached to: Bridged adapter I do not see my TUN adapter. I have ...
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0answers
218 views

Packets sent through TUN interface not routed

I have a C program attached to a TUN interface. In my C program, I'm building packets and writing them to the TUN interface. Now to check if packets are really sent from my TUN interface I use ...
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0answers
114 views

Local Client/Server communication using TUN interfaces

I want to establish a local communication between a client and a server using TUN interfaces. The client program will be attached to interface TUN1 and we suppose that it has IP address @IP1. The ...
1
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0answers
562 views

IPsec Tunnel mode - RoadWarriors configuration

I've the need to configure IPsec tunnel mode between a gateway with static NAT (let's say its public IP is 172.31.0.105) and a number of clients that are behind dynamic NAT. Reading through some ...
3
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1answer
78 views

What is the best way to create remote tunnel?

I have 3 Linux servers: 10.0.0.0/24 - (10.0.0.10) Linux server inside my LAN. 20.0.0.0/24 - (20.0.0.10) Linux server with HTTP Apache server 50.50.50.50/32 - Server on Amazon AWS which see ...
1
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1answer
97 views

Kernel optimiziations for ioctl AF_INET operations

Our server solution handles many tunnel operation requests (add/update/delete) using the ioctl interface, and the AF_INET address family socket. Aprox. numbers are 100 operations/minute with over 8k ...
0
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1answer
172 views

Error “ssh_exchange_identification” with Corkscrew

I'm trying to reach my ssh server (i'm behind a corporate proxy) so I tried to use Corkscrew. My ssh server is listening on port 443, I put sshd: ALL in my /etc/hosts.allow and there's nothing into my ...
2
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1answer
2k views

stunnel - how to setup stunnel to handle ssl and attach http with it?

I am running Google App Engine which is a http web server with some redirecting and other real-time stuff. But it does not have SSL to include so its unable to make HTTPS. Therefore, i was trying ...
2
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1answer
959 views

Transparent Ethernet over GRE not forwarding traffic

I am running on Linux 2.6.30.9 and have been trying to setup a transparent ethernet over GRE tunnel. The network topology used is as follows: I want to bridge PC1 and PC2 using Transparent Ethernet ...
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2answers
1k views

GRE supported in kernel but iproute2 cant create GRE tunnel

Im trying to create IP over GRE tunnel but i get No such device: ip tunnel add gre0 mode gre remote 192.168.152.22 local 192.168.152.21 ttl 255 ioctl: No such device I have compiled GRE support in ...
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0answers
447 views

How to redirect/forward between a tun/tap device and a socket using linux tools?

I have a socks5 proxy that is bind to eth0. It opens two ports, Port1 is used to connect to remote (for example a http server), Port2 is to listen for clients to connect. Then I created a tun device. ...
2
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0answers
111 views

using udptunnel with openvpn

I'm trying to tunnel openvpn traffic (UDP protocol) over a firewall using udptunnel I can't use openvpn itself on TCP protocol. On the server I'm running udptunnel like this: udptunnel -s 9999 ...
1
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1answer
454 views

Dynamic port forwarding using socat

I'm trying to replicate the functionality of ssh -D <PORT> user@machineX to tunnel all my traffic from my current machine via machineX. I do not need the ssh shell open at all, I simply wish to ...
1
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1answer
529 views

Broadcast port to other computers after SSH reverse tunnelling

I have been reading on how to reverse tunnel and I am using this command: ssh -f -N -T -R25565:localhost:25565 dns.mindfulhacker.tk To forward my Minecraft server. My other server can connect to my ...
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2answers
4k views

What is the tun network interface for?

I noticed when running ifconfig that there is a network interface called tun0 and it has an ipv4 address. A bit of research shows that it is a tunneling device, but I don't really know how it's used, ...
5
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1answer
4k views

apt-get via ssh-tunnel if only port 22 is allowed

I have a server which has only access to the outer world via port 22 (for the use of ssh from the server to other computers). I want to install some packages via apt-get on this server. Can I achive ...
2
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2answers
604 views

Getting internet to Linux VM without being detected by Network

I'm trying to get internet to a Linux VM (Backtrack 5 on VMWare Workstation). Unfortunately I was told to not "bridge" the connection from the VM because it could be detected by our companies network ...
0
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1answer
703 views

How can I mount a remote sshfs directory of an publicly inaccessible server on my inaccessible client machine?

This is an extension of the question by @Andrei How to mount remote SSHFS via intermediate machine? Tunneling? I'm in the same situation that I want to mount a remote directory, however the ...
1
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1answer
797 views

VPN, one server, multiple clients

I wanted to know if it was possible to have a server running OpenVPN with server key and have multiple clients connect to it? I would like the server to be 10.9.8.1, the first client to be 10.9.8.2 ...
8
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1answer
2k views

Forward all ports SSH

I have a question about SSH/Port forwarding. I haven't found the solution anywhere and don't know if there is any. I have a server behind my NAT box at home. I have port forwarding from my NAT box to ...
0
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0answers
186 views

pptp differs between 3.7 and 3.8 linux kernel milestone with 3.2.0-4 milestone

Unfortunately, current kernel of debian has problem with my hardware: 3.2.0-4-686-pae , and when i compile one of 3.7.x milestone or 3.8.1 itself , my problem is solved. But my problem with new ...
1
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0answers
590 views

Packets not received by TUN device

I created a TUN device(nat64) and created a route so that all the required packets are forwarded to the TUN device from an eth device. But, I see that many packets are not received by the TUN device. ...
1
vote
2answers
845 views

OpenVPN uses wrong IP-Address

I've installed OpenVPN on a client (behind NAT-Router) and a VPS server. The tunnel is established. However, ping is only possible from client to server. The server uses its public IP address on tun0 ...
1
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0answers
390 views

Reverse tunnelling with “stunnel” in linux

Scenario: Central Log-Server(logserv)- only private IP interfaces Multiple client servers (logclient)- has public IPs. Requirement: Need to tcp logs of syslog application from various logclients ...
2
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7answers
2k views

Creating an HTTPS tunnel

I have a VPS. How do I connect to my server through HTTPS protocol and redirect my browser connections to the HTTPS connection? Currently I use SSH tunnel but it's too slow.
3
votes
1answer
3k views

ssh tunnel on ssh tunnel between Windows and two Linux machines

I have the following configuration and want to establish a tunnel on a tunnel. I read already the following topic: How to put a tunnel in a tunnel? My configuration: Notebook --> Linux Server A ...
2
votes
1answer
449 views

Should OpenVPN point to point tunnels be on different ports?

The OpenVPN cookbook shows an example for site-to-site VPN (3 sites). They configured each tunnel on a unique port: site A to site B: 1194 site A to site C: 1195 site B to site C: 1196 The author ...
3
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1answer
813 views

List ports tunnelled on OpenSSH server

Is there any way to list the tunnels that SSH clients connected to my OpenSSH server have set up? I can use e.g. lsof -i to show connections that are being actively tunnelled, but I'd like to be able ...
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1answer
7k views

Why are incoming packets on a TAP interface seen with tcpdump but not with iptables?

A program injects packets on a Linux TAP interface (these packets are coming from a virtual machine). Specifically, these are DHCP requests (so they're UDP). I can see the packets with tcpdump but not ...
3
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4answers
2k views

Simple way to create a tunnel from one local port to another?

I have a development server, which is only accessible from 127.0.0.1:8000, not 192.168.1.x:8000. As a quick hack, is there a way to set up something to listen on another port (say, 8001) so that from ...
9
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1answer
5k views

How to utilize TUN/TAP tunnel from user program?

I recently discovered the existence of Linux TUN/TAP interfaces and am still trying to understand them. I think I get the basic concept - pseudo devices are created which emulate a network interface ...
3
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1answer
2k views

How do I configure OpenVPN as a Gateway client for Witopia?

I have the following setup: Witopia SSL account Synology 409 NAS (with OpenVPN and Apache etc) PS3 Mac Apple AirPort router (configured for NAT) Locked IPT-box (using DHCP and NAT traversing) ...