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11
votes
1answer
7k views

ssh tunnel - bind: Cannot assign requested address

Trying to create a socks (-D) ssh tunnel - Linux box to Linux box (both centos): sshd running on remote side ok. From local machine we do / see this: ssh -D 1080 user@8.8.8.8. user@8.8.8.8's ...
7
votes
3answers
1k views

Copy data through SSH tunnel over multiple hops

We have two main environments in question: Development and QA Each environment has two servers: Jump Box Application server In order to connect to the application server, you must connect to the ...
4
votes
2answers
2k views

Replace DNS on Openvpn client without redirect-gateway

I am trying to push DNS to the client with OpenVPN server with config: push "dhcp-option DNS 192.168.x.x" It is working well, but what I really need is that during the VPN connection I do not ...
3
votes
1answer
63 views

Can I have an alert when a IPSEC is down in Fortigate 80C?

We have a fortigate 80c and 60D with an IPSEC VPN . Is there a way to use the log (or other tool) to send an email alert when the tunnel is down? I couldn't see anything on the Log & Report tab
3
votes
1answer
598 views

selective routing through a VPN tunnel

The problem: after establishing an IPsec VPN tunnel all traffic is routed to the remote endpoint, while I only need to route the packets destined to that internal network and still be able to access ...
3
votes
2answers
227 views

How to set up a 6in4 / 6to4 tunnel server on a Linux gateway?

I have native IPv6 connection (/64 prefix), and I've been trying to set up IPv6 connection behind a OpenWrt router. But I discovered that I was unable to use ebtables to pass through all IPv6 traffic ...
2
votes
2answers
1k views

Set up a 6in4 tunnel server

I'd like to set up an IPv6-in-IPv4 SIT tunnel server. I've combed through the Ubuntu IPv6 wiki page but everything is geared towards connecting to a tunnel as a client, rather than hosting one. I'd ...
2
votes
2answers
2k views

Correct options for keeping open a reverse SSH-tunnel using autossh

I have a set-up with a LDAP-sever (ldapserver) behind a strict firewall, and a webapplication running on a sever (appserver) outside that firewall that needs to authenticate using that LDAP-sever. I ...
2
votes
3answers
552 views

Use server's IP via SSH tunnel

Firslty my setup is an Ubuntu laptop and an Ubuntu server. I have a program on my local laptop which needs to access a certain web-service, (lets call it http://someserver.com/someservice123). Now ...
2
votes
2answers
993 views

Cannot run OpenVPN on port 53 (DNS Stops Working)

So I'm trying to get OpenVPN to work on port 53 - sadly this isn't working. I used IP tables to map port 53 to port 1194 (standard OpenVPN port) Here's what I run to do this: iptables -t nat -A ...
2
votes
2answers
1k views

SSH tunnel doesn't work

I am trying to use my server as a "proxy" with ssh. However, setting up tunneling with ssh -D localhost:8000 user@myserver does not work. I tested this on various machines with ssh and putty - It ...
2
votes
1answer
767 views

Tunnel only one program (UDP & TCP) through another server

I have a windows machine at home and a server with debian installed. I want to tunnel the UDP traffic from one (any only this) program on my windows machine through my server. For tcp traffic this ...
2
votes
1answer
1k views

Tunnel apt traffic from private network through public to the internet

I've got 4 Servers under the following config: Servers 1 and 3(Web Server, Mail server respectivelly): NIC1: Public Network, Connected to the Internet NIC2: Private Network, Communication between ...
2
votes
1answer
268 views

How to get the list of SSH tunnels connected with the username used?

The connection is established from Desktop(D) to Server(S) with ssh -D PORT username@Server. From the Server, the list of ssh users connected can be obtained with who, but the ssh tunnels are not ...
2
votes
1answer
699 views

L2TP/IPsec through HTTP Port 80

i got an VPN (L2TP/IPsec) Tunnel running on my synology nas. my router is configured for vpn passthrough. so everything is fine. furthermore i got an webservice running on port 80. now i got the ...
2
votes
1answer
476 views

SSH connection refused on an unusual port

Using AWS EC2 Reverse SSH tunnel initiated from a remote machine to AWS: /usr/bin/autossh -M 0 -N -R 19999:localhost:22 ec2-user@ec2.aws.com -v -i cloud.pem Added port 19999 in AWS security ...
2
votes
1answer
3k views

Connecting to MYSQL over SSH tunnel

I can ssh onto the remote server and login without a problem. I'm trying to connect to a remote mysql db over a ssh tunnel and running into issues. I've created the tunnel successfully (verified by ...
2
votes
1answer
268 views

How to provide access to lan mysql DB from a remote server?

Consider the below network configuration: A client connects with its workstation to the application server on the Web. The application is full HTML, so only browsing through HTTPS is enough to ...
2
votes
0answers
813 views

Site-to-site VPN between Azure Virtual Network and a Cisco RV016

I'm attempting to configure a Cisco RV016 router to connect to an Azure Virtual Network to create a site-to-site VPN, but it's not working. I'm aware that a Cisco RV016 is not in the list of ...
2
votes
1answer
351 views

Redirect SSH traffic through GRE tunnel

I'm trying to redirect all local connections with destination matchs port 22 to specified tunnel using iptables MARK, but, something is going wrong. 1.1.1.1 my public address 2.2.2.2 tunnel public ...
2
votes
0answers
158 views

Dynamic VPN tunneling technologies

Ok, so I'm asking a more specific question this time. I'm writing a paper about Cisco's DMVPN and one of the tasks I have is to make the analysis of available network solutions which use dynamic VPN ...
2
votes
0answers
347 views

Forward IP packets to tunnel device

I have created an tunnel device using ip tuntap add dev tun0 mode tun user 0 group 0 I then assign it an ip address 192.168.0.1/22 ifconfig tun0 192.168.0.1 netmask 255.255.252.0 On my ...
1
vote
2answers
926 views

Connection refused in ssh tunnel to apache forward proxy setup

I am trying to setup a private forward proxy in a small server. I mean to use it during a conference to tunnel my internet access through an ssh tunnel to the proxy server. So I created a virtual ...
1
vote
2answers
2k views

Tunneling a public IP to a remote machine

I have a Linux server A with a block of 5 public IP addresses, 8.8.8.122/29. Currently, 8.8.8.122 is assigned to eth0, and 8.8.8.123 is assigned to eth0:1. I have another Linux machine B in a remote ...
1
vote
2answers
234 views

reverse ssh tunnel over stunnel (or just reverse back down the stunnel connection)

I'm creating a security "dropbox" that can be deployed behind nat or any firewall, call out to a controlled publicly accessible server and then initiate control from the server. I know this is easily ...
1
vote
1answer
213 views

Fail safe SSH tunnel Ubuntu (always up)

I need your advise for a very important technical issue on our project. We need to have a SSH tunnel always up between our two servers. We have a MySQL database replication process going between those ...
1
vote
1answer
328 views

Difference between site-to-site and client-to-site configuration on openVPN server

I am trying to setup a site to site VPN tunnel using openVPN. The server currently is setup to accept client to site connections. When configuring a site to site tunnel (as opposed to the client to ...
1
vote
1answer
557 views

Managing multiple servers behind a firewall with SSH reverse tunnel

I have 10 Ubuntu servers in different locations, behind a firewall each (local_server_1 to 10). All those servers are authorized to SSH into my public server (lets call it master) using ssh keys (in ...
1
vote
1answer
438 views

WCCP and Squid, and Tunnels

I'm trying to configure WCCP + Squid with the following documentation: http://www.crypt.gen.nz/papers/cisco_squid_wccp.html I have a cisco switch, a test client, and a squid proxy server. I think ...
1
vote
1answer
58 views

Connect two mac computers/servers using a tunnel or private VPN? [closed]

I've got software I need to run on two computers on two separate networks (one behind a nat). The software requires both sides to have a static ip address that doesnt change. I assume some sort of ...
1
vote
1answer
3k views

How do i route TCP connections via TOR? [closed]

I was reading about torchat which is essentially an anonymous chat program. It sounded cool so i wanted to experiment with making my own. First i wrote a test to grab a webpage using Http. Sicne .NET ...
1
vote
1answer
973 views

Configuring ipv6 over radvd using sixxs, routing not working

So this morning, I have been trying to configure IPv6 upon my network using the guide I found on reddit (of all places) at http://ipv6friday.org/blog/2012/06/ipv6-enabling-training/. Now at first ...
1
vote
1answer
1k views

stunnel version 4.53 says SSL server needs a certificate on Windows 7

I have been using stunnel previous versions just fine. It didn't apparently have the feature of a certificate in SSL server mode. That's alright but not necessary for us as we're simply running a ...
1
vote
0answers
60 views

How do I set up an ssh -w tunnel VPN between AWS VPC and a Linode?

I'm probably not going to use this for the long term, but I still want to know why this isn't working. I've set up a simple ssh tunnel from my Linode instance to one AWS EC2 instance within my VPC. ...
1
vote
0answers
58 views

Route public subnet to client location

Due to the fact that my ISP introduced CGN/DSLite and I still need public IPv4 addresses, I was thinking about tunneling an unused /29 that I own from my server to my local Linux box. After doing ...
1
vote
0answers
70 views

VPN/tunneling/proxy service for devices in the field

I'm trying this question here, but if there's a better stack exchange or somewhere else that's more appropriate, please let me know. Thanks! We have a number of devices in the field in corporate ...
1
vote
0answers
21 views

graceful tunnel remote change

I want to solve a networking problem: Say I have 3 machine A, B, X in a local-network, where user have access to network resource of X's network interface tunX, which is a tunneled interface connects ...
1
vote
1answer
238 views

What do transmit errors on Linux IPsec virtual tunnel interfaces indicate?

Our monitoring system is indicating transmit errors on the IPsec VTIs on our Vyatta Core routers when they are under high load. They only appear fairly occasionally, and don't appear to seriously ...
1
vote
1answer
354 views

Openvpn forward all routing to a socks port

Is it possible to configure openVPN to route all client connections through a socks port? ie, I want the setup to be: Client -> openvpn server -> localhost socks5 port -> socks5 port forward ...
1
vote
0answers
387 views

Using TomatoUSB and OpenVPN to tunnel IPv6 traffic

Assume the following scenario regarding the current IPv4/OpenVPN setup: Central Site with a /64 IPv6 (10.0.0.1) | | OpenVPN Server A OpenVPN Server B ...
1
vote
1answer
1k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
1
vote
1answer
1k views

Routing all data through an VPN tunnel with ppp

I'm trying to create a VPN tunnel that forwards all data from the local machine to the VPN server. I'm using ppp-2.4.5 for this with the following configuration: pty "pptp <VPNServer> ...
1
vote
1answer
612 views

How do I know if an openVPN tunnel is established?

How do you know if a Site to site VPN tunnel is established in OpenVPN? Apart from pinging the other side, is there a command or something that shows the status of the tunnel? I am using centos on ...
1
vote
1answer
59 views

Dynamic tunneling technologies [closed]

Are there any other technologies like Cisco DMVPN that use dynamic tunneling in layer 3 networks?
1
vote
1answer
149 views

Configure subversion to start SSH tunnel automatically for HTTP-only SVN server

We have an SVN server accessible with HTTP (and only HTTP) running on a firewalled port on our development system: dev $ svn checkout http://localhost:1234/proj/trunk On my workstation, I created a ...
1
vote
0answers
587 views

why ping6 fails if tcpdump shows ICMP6 request/reply traffic?

I'm having a very strange problem with IPv6 pings on OpenWRT (fon-ng firmware with IPv6 enabled) and hoping someone can help with investigation. In short - wpan0 interface with address aaaa::1/64 is ...
1
vote
1answer
392 views

SSH Tunneling for Munin

I had at home an NAS and in the datacenter a Server. I make an SSH Tunnel with the following command: autossh -fN -M20404 -R 1337:localhost:22 user@server (from the nas to the server) Its working ...
0
votes
3answers
76 views

is it possible in this case to get two IPv6 networks to communicate over the IPv4 Internet?

I have a setup of a laptop connected to a cellular IPv4 network (3G usb dongle) and PC connected to another IPv4/IPv6 network. Both have been configured to run as IPv6 routers and each has its IPv6 ...
0
votes
1answer
48 views

SSH tunnel issues since setting up public key login

I'm trying to create an SSH tunnel using the command: ssh -L 3307:127.0.0.1:3306 remoteserver Previously, I had not set up public/private key login (for passwordless login). Using this command ...
0
votes
4answers
433 views

Tunnel between windows through linux server for sql server, possible?

One in a while I need to check some data in a MS SQL Server in another location. As for now this requires making database backup, moving it to another server so I can download the .bak file and ...