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Questions tagged [tunneling]

The tag has no usage guidance.

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1answer
27 views

OpenVPN persist-tun option - what's the point?

According the OpenVPN 2 Cookbook: The persist-tun and persist-key options are used to ensure that the connection comes back up automatically if the underlying network is disrupted. These ...
0
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0answers
5 views

How can I fix SSH-PPP bursted behavior? [duplicate]

I was reading this article about PPP over SSH. In section 2.2, the article says: Tends to be bursty: For some reason, when network load gets high, one tunneled TCP connection tends to ...
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1answer
38 views

How to create a gretap tunnel between two AWS EC2 instances?

To create a tunnel between two machines connected to the same network, I can run the following commands: From host A: sudo ip link add gretap1 type gretap local HOST_A_IP remote HOST_B_IP sudo ip ...
2
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1answer
56 views

Tuning network interface for TCP over TCP in Linux

I'm porting a legacy embedded application to Linux. This application communicates with a remote server over a TCP connection using a proprietary protocol. In addition to the application specific ...
0
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1answer
57 views

Is it possible to create iface teaming/bonding over tunnel devices?

I have several physical NICs on one server which should be able to access peer server's physical NICs. I have ip-tunnel devices (currently set as GRE) between each pair of NICs. I'd like to team/bond ...
0
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1answer
135 views

Administration of multiple sites (tunneling) - MikroTik & NAT

I would like to ask you for your opinion. I need to find a secure way how to manage small remote sites where I have RBs. We have HQ, where is Kerio Control as a FW and a lot of small sites with ...
0
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1answer
171 views

Curl through intermediate server

I need to send PUT/GET/POST request with curl through a custom port from client1 to server2. However, server2 only accepts these requests from server1, and denies client1 if connected directly. What ...
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0answers
44 views

SSH tunnel for serving web sites from localhost

This is more question... When I do like this... I am able to serve my site to external IP of my VPS... ssh -L 8080:localhost:80 username@server.com How secure and is it okay to serve websites ...
0
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1answer
136 views

Linux GRE Tunnel: Remote Address parameter

The Linux GRE tunnel as two parameters, local address and remote address. Suppose I have two routers, the left one is outside of a NAT and right one is inside NAT, then I want to create a GRE tunnel ...
0
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2answers
177 views

SSH tunneling shows no response.

I am trying to ssh tunnel into this CTF box and this is the command I am using ssh -L 2020:127.0.0.1:5901 user@196.168.88.47 and to connect to the 2020 socket I use ssh -p 2020 root@127.0.0.1 ...
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0answers
29 views

How can i move all the network traffic on the backend over the gre tunnel?

i have a gre tunnel with a frontend and a backend. I need to move all the backend traffic over the gre tunnel in order to reach all applications of the backend via the frontend IP. Can you help me? ...
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0answers
109 views

Connecting IP GRE and EoGRE tunnel in the same linux host

Is there a way to forward the payload of a GRE traffic to a different EoGRE tunnel on the same Linux host ? Host A (GRE (IP/GRE/IP)) <—> (GRE (IP/GRE/IP)) Host B (EoGRE(IP/Ethernet/GRE/IP) <...
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0answers
37 views

How to setup Watchguard so VPN client could be accessed from trusted network ? (HQ <=> remote servers)

Anyone knows how to setup Watchguard VPN so I could connect from X number of remote servers to HQ Watchguard Firewall and trusted network, while trusted network could access remote servers ? At this ...
0
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0answers
296 views

iptables mark + ip rule + ip route not working

I'm using a VPN (openconnect) with ipset on linux, but it isn't working. To simplify the problem, I will only say the key steps. I'm using a device with IP address 192.168.1.128. My VPN server ...
0
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1answer
269 views

Android OpenVPN disconnects the SSH tunnel

I want to tunnel my OpenVPN traffic through an SSH tunnel. I have An OpenVPN server behind a router running on port 4321 SSH server on the same machine on port 22 Router forwards ports to the server'...
0
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1answer
711 views

Access to IP Camera using VPN to Webserver for Public IP

I'm tasked with setting up access to IP cameras in remote construction sites in the Philippines. The internet access is provided via Ubiquiti Power Beam from the only supplier available in the area. ...
0
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0answers
95 views

mosh connect via proxy to a firewalled server

I'm looking at mosh as ssh replacement. However the servers I want to connect are firewalled with company's vpn/proxy whitelisted. My current solution via ssh is this config: Host *.someserver.com ...
0
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1answer
430 views

Route one or multiple Public IPs via VTI over IPSec site-to-site tunnel

I successfully created VTI over IPSec Site-to-Site tunnel between my home router (UBNT Edgerouter) and dedicated server (Ubuntu 16.04) at OVH. I can route internal private networks of each sides via ...
1
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0answers
175 views

Linux routing issues with tun0

I am attempting to get hanstunnel (IP over ICMP) to work on my VPS I have: Ubuntu 16 VPS with: ens3 a.b.c.d (external ip) tun0 10.0.0.1 Ubuntu 16 VirtualBox with: enp0s3 192.168.1.1 tun0 10.0.0....
0
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1answer
237 views

IPv4 over IPv6 tunnel for HughesNet user

I have a client who wants to access cameras remotely via a HughesNET Internet connection. HughesNET using carrier grade NATting (CGN) for IPv4 and so does not provide their customers with publicly ...
0
votes
1answer
540 views

GRE Tunneling not working

i've been looking everywhere for a solution to this but have found really nothing. I was wondering if it is possible to forward ports such as 80 through an OpenVPN connection? I am using an OVH VPS ...
0
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1answer
105 views

OpenVPN connect to other servers in LAN

I have installed OpenVPN on a Ubuntu server and I have OpenVPN -client on my PC. I can connect from the client to the server with no problem (still have the same ip). How can I set up connection to ...
2
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1answer
124 views

VXLAN format details

Learning about VXLAN I found in a document: ...VTEP1 then adds a VXLAN header that contains the VNI to the Ethernet frame, encapsulates the frame in a Layer 3 UDP packet, and routes the packet ...
0
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1answer
396 views

Dell iDrac with SSH Tunneling : administratively prohibited open failed

I've a problem to access to my iDrac interface over SSH. I want access to my iDrac WebUI by SSH Tunneling but I've this error : channel 6: open failed: administratively prohibited: open failed My ...
0
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1answer
626 views

IPSec Tunneling Between 3 Different Sites

I need some help to shed me some lights over an IPsec tunneling. Here I will explain on my current setup. Site A <-------IPSEC------> Site B (HUB) <------IPSEC------> Site C 10.1.1.1/24 ...
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1answer
1k views

how to jump in a server using putty [closed]

I am facing a situation: From my Local Machine (LM) I connect in a VPN using OpenVPN (HTZ) then I am able to use putty to connect into a HTZ server (lets call it server X). From that server X I have ...
1
vote
2answers
724 views

SSH known_hosts with a dynamic IP

I have a machine behind a firewall. I connect to it remotely using a VPN tunneling with a port forward through ssh. To connect to the machine I use the external IP of the VPN and my personal and ...
1
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0answers
273 views

How to debug tun0 issues with OpenConnect Juniper

I'm using OpenConnect in Debian testing to connect to a corporate Juniper VPN, this way: sudo openconnect --juniper -v <my_corporate_VPN_url> I'm doing this from three physical instances of ...
0
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1answer
744 views

Forwarding OpenVPN traffic on specific port to different OpenVPN server

I am trying to figure out how to setup an OpenVPN server that is able to forward traffic from a specific port to another OpenVPN server at a different location. I guess this could best be described ...
1
vote
3answers
2k views

SSH Tunnel connect 2 Servers via third Server

I have 3 Servers, A is a public accessable Server in the Internet. B Hosts a Webservice I want to access. C has access rights to connect to A and B. Now i want that if a Client D tries to access a ...
1
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0answers
61 views

IP Tunneling problems with RDP

I have a problem with IP tunneling. Servers : services01 (proxmox host) (internal ips : 10.21.21.0/24) (tunnel ip 172.16.0.1) backup01 (proxmox host) (internal ips : 10.21.23.0/24) (tunnel ip 172....
1
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2answers
3k views

Forward an FTP/SFTP connection to another server (instead of tunneling from the client)

I've been accessing a server's files via Sublime SFTP. The issue is that I need to tunnel into my destination server via a middle-man server (that I have root access to). Client → Server A (middle-...
2
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0answers
46 views

Restricting query types in Bind9

The network is relatively straightforward: on the inside there is Active Directory, in the DMZ is a BIND9 DNS forwarder. The Active Directory domain controller is the internal DNS server for all ...
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votes
1answer
328 views

Traffic not routed through OpenVPN properly [closed]

I have the following problem: I am running an OpenVPN Server on my Debian 8 VPS. Everything is working fine except for one thing: All traffic to any server is completely routed through tun0 (...
0
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1answer
1k views

disable CONNECT in squid proxy

I have a requirement to disable tunneling through squid proxy. This is the first time I am setting up the proxy and can't seem to find much information on disabling CONNECT/tunneling.
0
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1answer
167 views

routing based on interface used?

I have two internet connections. Default eth0 and a vpn tunnel on tun0. my ip show route shows: default via 149.202.xxx.xxx dev eth0 10.8.8.0/24 dev tun0 proto kernel scope link src 10.8.8.234 ...
0
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1answer
186 views

What's wrong with my Racoon configuration?

I made the racoon configuration in this topology And I set up the racoon of the left server and the right server.Left server /etc/racoon/racoon.conf configuration: remote 1001::2 { exchange_mode ...
0
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1answer
138 views

SSH multiple tunnels

I am on an AWS box and want to connect to a production machine through my local computer. If I just wanted to connect from my local computer, I could connect as follows: ssh -ND <port> prod-...
2
votes
1answer
2k views

Routes for two openvpn connections (different hosts) in the same client

Im trying to make multiple tunnels in the same client, and after a successful connection to the openvpn server I've applied some routes for the tunnels created without success. My first tunnel works ...
1
vote
1answer
188 views

Multiple openvpn clients in different hosts

I'm trying to run multiple openvpn instances at the same time, all works fine running a single one, but I would like to have several instances, one of each connected to a different host and from there ...
0
votes
1answer
78 views

Connect to GIT repo through another server

Current scenario: Right now, in order to be able to work with our git repository we do have to use a VPN since the repo server does not have a public IP. Goal: What I'm trying to accomplish is to ...
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1answer
57 views

Any good solution to deliver private HTTP service to public with reverse connection?

I am looking for a solution to let a private LAN HTTP service accessible from WAN with minimal configuration. For example, I have more than 1000 deployments of HTTP service across nation running in ...
0
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0answers
104 views

File transfer data corruption

I am having a very strange data/file corruption over GRE/IPSEC tunnels. I have two sites connected with WAN links (four links, 80mbps one, 50mbps another, and 20mbps remaining ones). I am using GRE ...
0
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2answers
133 views

Having trouble while setting VPN tunnel

I want to setup VPN tunnel between hosts, such that their subnetworks can connect each other. Ex:- DummyNetwork ---> PC1 (HOST A) ------------- PC2( HOST B)------ >DummyNetwork PC1 IP address : 192....
1
vote
1answer
119 views

Finding a way to port forward a port-binding application via SOCKS

I'm running a program that binds a specific port on a host computer (running Windows 10) behind a firewall, and I don't have permission to port forward directly through my network. Instead, I'm trying ...
1
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0answers
116 views

Why does v6v4tunnel not work on hyper-V guest?

I'm attempting to setup up a Windows v6v4tunnel on Windows 10 Build 14393. Creating the tunnel is straight-forward. netsh interface ipv6 add v6v4tunnel interface=IP6Tunnel 192.168.1.12 xx.xx.128.26 ...
0
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1answer
96 views

HTTP CONNECT: does sshd talk HTTP?

I'd like to understand the mechanism of HTTP tunneling better: So I've got a corporate HTTP Proxy that supports HTTP CONNECT method. I configure something like corkscrew to tunnel SSH over HTTP ...
0
votes
1answer
818 views

What IPv4 endpoint should I mention?

I am trying to create regular tunnel on https://tunnelbroker.net. Public IP address of our institute is 14.139.196.2. On using this address as IPv4 endpoint address the message "IP is not ICMP ...
0
votes
1answer
144 views

Why is my host not receiving packets sent across tun0?

I have a tun0 interface set up which allows packets to be sent as such: HOST (aaaa::1) ----> tun0 ----> SLIP ----> Router (aaaa::200:0:0:1) The router receives the packets, and can send back a ...
0
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2answers
393 views

How to make ssh based vpn?

I have some problems with making ssh-based VPN. Situation: LOCAL -> GATE -> SERVICES (ssh server) (Many other servers with some services) 192....