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1k views

Why are my reverse SSH tunnels suddenly dying?

I have had persistent tunnels from all my client computers to my servers in place for about a year now. I've not updated my server or changed any configuration files--as far as I remember--for several ...
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1answer
3k views

RDP from 2008 R2 through a tunnel fails

I'm trying to RDP from a Win7 to a 2008 R2 machine through a tunnel (think SSH, but not exactly). It fails and the following is in the 2008 R2 (destination) event log: System Event Log, LsaSrv ...
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2answers
3k views

GRE Tunnel over IPsec with Loopback

I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let ...
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1answer
181 views

IPv6 (aiccu tunneled) server consistently resolves addresses to its own IPv6 address

I have a Fedora 10 server using an IPv6 tunnel broker (sixxs). One of the nagging things I have noticed is that using any common utilities like "wget" domains resolve to the real IPv4 destination ...
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3answers
330 views

Another SSH Tunneling question

Here's the Diagram Server A ----> Server B <----- Laptop So basically Server A and Laptop can connect to Server B directly but you can't establish a connection from Server A to Laptop directly, ...
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2answers
304 views

Security concerns of having IPv6 (tunneling) enabled in network computers

Are there any security concerns having IPv6 and Teredo tunneling enabled in Win Vista/7? AFAIK, using Teredo basically allows bypassing of the firewall, as the firewall cannot really filter the ...
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1answer
64 views

OpenVPN: Traffic Redirection not Working

tl;dr (after hours of debugging with @krisFR): At least under Debian 8, never use virtual interfaces (eth0:1) for OpenVPN, instead apply the new debian iproute2 methods (manual approach) described ...
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1answer
127 views

Ip-in-Ip tunnel not working — Packets not being decapsulated

I am trying to forward packets from HostA to HostB using ip-in-ip tunneling. While packets are reaching their destination, they are not being decapsulated by the receiving host, and thus being dropped ...
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1answer
527 views

Using a reverse tunnel to access a firewall-ed web server serving HTTPS

I have a device ("A) on my network that only serves content via HTTPS, it's not accessible as its behind my router/firewall. I have another machine ("B"), elsewhere on the internet (fake IP of ...
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1answer
1k views

Routing default gateway for 2nd vlan over a tunnel (linux/tinc)

Fixed: It turned out to be a combo of what BatchyX said (missing the 172.16.101.0/24 route on the remote end), and tinc on the remote side failing to run a -up script (the script wasn't executable). ...
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1answer
639 views

Ssh socks server doesn't work [closed]

I want setup socks server on my localhost which forward all http traffic on my remote server for bypass firewall rules at my work net. And so I start it as usually sudo ssh -C2qTnN -D localhost:8080 ...
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1answer
105 views

Secure tunneling options between datacenters

My setup is main website server in one datacenter and mirrors in multiple other datacenters. I'd like to know what are my options to transfer traffic secure and stable between servers? Ssh tunneling ...
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1answer
96 views

Bizarre client IP switch-up on VPN

Let A.B.C.D be the public IP of my VPN server. Let W.X.Y.Z be the IP of the client before it connects to the VPN. My VPN server's IP address on the LAN in 10.8.0.1, and the client is 10.8.0.6. I ...
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2answers
4k views

SSH Tunnel slow

I just moved halfway across the globe and am having a strange connection issue. I have a 4 Mbps dsl connection, can successfully ssh into my server, and setup a tunnel. I use PuTTY (on my desktop - ...
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1answer
1k views

Forward all traffic through an ssh tunnel

I hope someone can follow this and I'll explain as best I can. I'm trying to forward all traffic from port 6999 on x.x.x.224, through an ssh tunnel, and onto port 7000 on x.x.x.218. Here is some ...
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2answers
423 views

Setting up local IP based filtering with OpenSSH on Ubuntu

Greetings, the server admin for our company suddenly left, and left the rest of us IT folk somewhat clueless about Linux and setting up servers and such. The setup is as follows: Our local server, ...
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2answers
1k views

MySQL Workbench HTTP tunnel

Is there way in MySQL Workbench to connect to a database via HTTP Tunnel? I've used HTTP tunnel for a while with Navicat and I would like to connect on same way to a remote databases with MySQL ...
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2answers
162 views

Secure, automatic tunnelling dæmon on Linux server?

I've been looking for software to do this for a little while but seem to find only pages that talk about projects that never materialized, or are not capable of running on a Linux system. Does anyone ...
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2answers
2k views

SSH over SSH Tunnel

I have seen this question: http://serverfault.com/questions/33283/how-to-setup-ssh-tunnel-to-forward-ssh but I'm having difficulties because of OS barriers. I have someone sitting on an XP laptop ...
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2answers
2k views

Is there an encrypted udp based tunnel that doesn't need a tun/tap device?

I am looking for a "application tunneling" solution that behaves a similar to an ssl or ssh tunnel but over UDP. One the client end, OpenVPN provides an network interface. I want the client end to ...
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2answers
3k views

Route specific HTTP requests through pfSense OpenVPN

to start, I have very little knowledge on routes, iptables, etc. That said, here's what I'm trying to accomplish and where I think I'm stumped: Problem: We have an external website which we recently ...
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1answer
1k views

Source nating into GRE tunnel

On a Linux box, I have create a GRE tunnel called gre1 172.17.1 -> 172.17.2. The Linux box IP is 10.10.100.100, the end point IP is 10.10.101.101. I am trying to do a source NAT (NOT destination NAT) ...
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2answers
1k views

Split Tunnel VPN using incorrect Tunnel

Our company has a handful of field offices that have recently been setup with a regular internet connection after we removed the T1 and router that connected them directly to our network. Now, when ...
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1answer
137 views

How to use same MPLS Traffic Engineering tunnel for ipv4 and ipv6

I have MPLS TE configured and working, but it is currently using IPV4 and I needed to include IPV6. My current tunnel configuration is the following: interface Tunnel1 ip unnumbered Loopback0 ipv6 ...
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1answer
4k views

Trouble with site-to-site OpenVPN & pfSense not passing traffic

I'm trying to get an OpenVPN tunnel going on pfSense 1.2.3-RELEASE running on embedded routers. I have a local LAN 10.34.43.0/254. The remote LAN is 10.200.1.0/24. The local pfSense is configured as ...
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1answer
305 views

IP Tunneling for SMTP server on Windows 2008?

I have a Windows 2008 server that is running an SMTP server. The server has a public IP Address. I have 2 other windows servers, not in the same network, that are used for hosting client applications. ...
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1answer
111 views

Am I obliged to use ipv6 tunnel services if I want to be able to use it?

I was looking for configuring Slackware to use ipv6 but all instruction I found speak about using an ipv6 tunnel that encapsulate ipv6 request into ipv4 packet and send them to an external router that ...
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1answer
533 views

VPN, Tunneling to hide 'real IP' through my proxy server while showing the client IP on 'real' server side

I would like to hide my 'main server' behind the load balancer, call it 'proxy server' Although I use some closed-source software on 'main server' and it needs the client IP address to operate well. ...
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1answer
339 views

Connect with sftp client to server that can be accessed only through other server

I am new to this forum and to this kind of stuff so don't judge me hard: I would like to connect with: sftp client (Bitise Tunneler) and nxClient (NOMACHINE) to the server A through other server B. ...
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1answer
2k views

GRE Tunnel between Linux server and XP client

I want to set up a simple unencrypted tunnel between a linux-server (running SLES9) and a client (running XP SP3). The reason for this is that there are many network devices in between and the client ...
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1answer
382 views

munin monitor ssh tunnel traffic stats?

Attempting to generate a traffic graph to monitor tunnel traffic between two vps'es. two servers: 111.111.111.111 & 222.222.222.222 111 is an app server, 222 is a db server. Proper iptables ...
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2answers
743 views

SSH option AllowTcpForwarding is bypassable?

I understand this is used to prevent users from using the server as a proxy. But if the users can use curl/wget, doesn't that mean it's essentially bypassable? The manual page regarding SSH also said ...
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2answers
278 views

Internet access via OpenVPN

Note: This is a repost from the OpenVPN forums I have just set up an OpenVPN on my Linode VPS, and I have successfully connected my Android phone to it. Now, I want to use the "route all traffic" ...
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1answer
446 views

Routing telnet/23 connection thru double SSH tunnel (SSH proxy server)

I have a contractor is using a Windows PC that is outside the corporate network. However, we allow connections via the firewall to certain hosts/ports. Telnet/23 from the contractor's PC to a ...
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1answer
289 views

Tunelling over HTTP

I have a network at work that is locked behind a firewall and Internet connection is available only by using a proxy server. At work, I can connect to databases that are distributed across the ...
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1answer
537 views

VMWare fusion NAT + host tunnel; access from vm

I'm having trouble accessing a port on my OSX host from a vm. I'm using NAT in VMware fusion. In my (OSX host) hosts file, I have the ip address for vmnet8 mapped to 'mac'. From my vm, I can 'ssh ...
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4answers
854 views

Inexpensive and Open replacement for Cisco Tunnel-based EasyVPN with Cisco VPN 3000 Series

I have a scenario where i have to establish peer-to-peer preshared key based VPN to a vendor. This vendor uses Cisco EasyVPN with Cisco VPN 3000 as access concentrator. I check the compatibility of ...
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1answer
709 views

GRE and IPSec Tunnel on the same interface

i have one route cisco 2800 series with a GRE+IPSec vpn tunnel configured. I need to create a new tunnel, but now this is a IPSec tunnel. What i want to know is that is possible to configure different ...
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1answer
636 views

GRE tunnel between a Cisco router and a snapgear firewall

Has anyone here ever setup a GRE tunnel between a snapgear firewall and Cisco Router? The Snapgear manual implies that it can be done, but doesn't give any examples. What is confusing me is that a ...
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1answer
592 views

Creating a VPN Tunnel between website and the server

The machine which is connected in server LAN has the IP Camera Connected. From server the IP camera video feed can be viewable. I would like to view this IP camera from anywhere on the world through ...
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4answers
464 views

Forward traffic between hosts

Please suggest the easiest way to forward all connections from host:port(external interface) to host2:port(external interface) When i use ssh -L local_port:remote_host:remote_port -N -l user ...
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2answers
475 views

on a cisco router can you run a tunnel and a vpn on the same interface and have vpn traffic pass over the tunnel

The problem I am having is I have a point to point tunnel from site A to site B. Remote users connect to site A via VPN. I would like them to be able to send traffic over the tunnel to site B. Is ...
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0answers
97 views

Make lan ip's available to external devices over openvpn [closed]

My goal is to make my home media library available to external devices. External device ====== OpenVPN Server ====== unknown Modem ----- OpenWRT --- lan machines External devices are OpenVPN ...
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0answers
757 views

Cannot make TCP Connection with OpenVPN Server

Client OpenVPN assigned IP: 10.8.0.2 ↓ TCP on 1194 Internet ↓ Router port-forwards 1194 to server- Public IP 104.162.67.198 ↓ Server LAN IP: 10.8.0.1 I think the above is what I am trying ...
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1answer
392 views

Debian don't forward through L2TPv3 more than mtu l2tp virtual interface

R3--R1--Internet--R90 R3: ip addr 10.123.0.3 R1: sudo ip l2tp add tunnel tunnel_id 699 peer_tunnel_id 699 encap udp local 5.254.174.8 remote 5.254.174.90 udp_sport 699 udp_dport 699 sudo ip l2tp add ...
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1answer
56 views

process group A default route tun0, B default route tun1, etc

I have a Linux box with N tunnel interfaces, tun0, tun1, and so on. I want to set things up so that a particular group of processes, A, has its default (and only) route pointed at tun0. Meanwhile, a ...
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0answers
142 views

HTTP CONNECT request body is reduced to / when proxying through Apache

I am using Apache 2.2.15 as a reverse-proxy running on Scientific Linux 6. It is being used to connect an application to a remote server, where the application being connected to requires that the ...
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1answer
211 views

4in6 tunnel for heterogeneous systems [closed]

I have clients (OS X 10.9 and Linaro/Ubuntu) in a native IPv6 network and a Server (Debian) in both native IPv4 and IPv6. The Plan is to use the Server as a gateway of sorts, as in 4in6 ...
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1answer
289 views

Apache proxy HTTP CONNECT method handshake failure between Apache server and destination server

Apache/2.2.25 (Win32) mod_ssl/2.2.25 OpenSSL/0.9.8y I'm trying to get the HTTP CONNECT method working with Apache. I'm testing it with two different destination servers. It works fine with one ...
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1answer
94 views

What are my VPN options?

We are changing ISPs and at the last minute the new company is refusing to set up a critical VPN tunnel that we currently have. Data comes into our office via a line into an ISP controlled firewall ...