Port forwarding is a process consisting in the translation of a host:port couple into another host2:port2 couple, both submitted to the same network mask.

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SSH tunnel between two Raspberry Pis to access a Webcam [on hold]

I have a webcam sitting behind a 3G mobile router which is blocked for access from outside. I think the best way to gain access to this webcam would be by setting up an SSH tunnel. I was reading ...
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2answers
35 views

How do I use a SSH tunnel as a alternative to port forwarding?

I want to use SSH as a alternative to port forwarding to use my RDP server from the outside as my ISP's router does not allow port forwarding. Here's what I have in mind: A - client connecting to the ...
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1answer
9 views

I'm setting up an IRCd on My VPS. How do I open up the normal IRC ports?

As the title states, I'm trying to get my IRCd running on my VPS. I have everything set up and ready, but I cannot connect. Did a portscan, and the prot isn't open. I have root access. How do I ...
4
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1answer
35 views

port forwarding to application in network namespace with vpn

I was able to set up a network namespace, establish a tunnel with openvpn and start an application that uses this tunnel inside the namespace. So far so good, but this application can be accessed via ...
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0answers
30 views

Connect to a pc which is in external network using ssh [duplicate]

I want to connect a PC which is in an local network with IP 10.1.10.25 while the IP address of router is 68.10.25.24 This PC is far away from me. How can I connect to that PC from my terminal using ...
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2answers
68 views

Cannot connect to localhost on port 4430

I am running vagrant from a virtual box with CentOS and Nginx installed. I've created a reverse tunnel from the vagrant box to a remote server but when I am trying to connect to my localhost on port ...
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4answers
82 views

Ssh into a remote server, but my organization has blocked port 22

I am using Redhat Openshift server to deploy my webapps. To access the contents of my application I have to ssh into their server. Example ssh 56555ff90abcdefbf6e000077@appname.rhcloud.com ...
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0answers
34 views

How to properly port forwarding between different machines using UFW / iptables and DD-Wrt?

This is my network I want to see my ip_camera (192.168.3.4:80) from outside my house. It is on dd-wrt router (192.168.3.1) without internet. The router 192.168.1.1 has internet. However, i have a ...
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1answer
45 views

ufw: how to forward single port to another port on different interface

I have two interfaces eth0 (192.168.1.2) and eth1 (192.168.3.2). I receive data from 8080 at eth0. I want to forward it to eth1 port 80. I'm using UFW, because i don't understand iptables and how to ...
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42 views

“channel 3: open failed: administratively prohibited: open failed” when creating a VNC session on a SSH tunnel

On creating a VNC connection via tunneled SSH connection, I get an error: channel 3: open failed: administratively prohibited: open failed I have found that this happens only when I'm not logged ...
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1answer
49 views

SSH local port forwarding

I am experimenting a bit with ssh port forwarding and I stumbled upon a confusing thing. It seems to me that the following commands are doing the same thing: ssh -NfL ...
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0answers
66 views

Why MS Sql port (1433) forwarding does not work over http_connect proxy?

I have a windows machine with putty, which has access to ms sql server on local network. And i have a remote Ubuntu machine on the Internet with sshd on 443 port (required to establish secured ...
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0answers
69 views

Iptables proxy, redirect all connections from a certain port to the internet?

I have an ubuntu pc and an android phone conneted to my router through a cable and wi-fi respectively. I set the android phone to use a proxy my-wan-ip:5555 and enabled port forwarding on my router on ...
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1answer
44 views

Use LAN printer over the Internet

I would like to be able to connect my laptop to my network printer while I am not at home, what would be a good way to forward the printer and to configure CUPS on my laptop?
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1answer
30 views

Port forwarding error

I am trying to use VNC on my KVM guest, following this guide: http://blog.scottlowe.org/2013/08/21/accessing-vnc-consoles-of-kvm-guests-via-ssh/ This is the ssh command I am using from my host: ...
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1answer
92 views

How to remove port number from url?

My application "XY" running on port 1234 in tomcat server. I'm using HA-Proxy for loadbalancing. So in loadbalancing my front end port is 5678 to access the "XY" application through browser. Right ...
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1answer
42 views

Access fron outside browser to shellinabox site

Server : 192.168.40.23 `# vi /etc/sysconfig/shellinaboxd` # TCP port that shellinboxd's webserver listens on PORT=6175 # specify the IP address of a destination SSH server ...
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26 views

Cannot telnet to Postgresql Forwarded Port

I'm trying to portforward a PostgreSQL port using my DLINK ADSL Router. I have the following IP addresses. Public Internet IP 197.321.321.32 PostgreSQL 192.123.123.12:5432 (Port To ...
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69 views

PostgreSQL Remote Connection debugging

I'm having issues connecting to my PostgreSQL database from an online source. PostgreSQL seems to be setup up fine it is running on it's default port 5432 and the postgresql.conf has the following ...
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2answers
84 views

How can I reach an open & listening port on Linux?

After forwarding the port I wish to open, I cannot seem to connect or get any data to this port. The PHP CLI software I have written is listening to the port actively on Ubuntu 14.04. Part of the code ...
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1answer
36 views

iptables selectable tunnel

I have this configuration script: I OPENVPN TUNNELS openvpn --config serverx.ovpn > /dev/null 2>&1 & openvpn --config servery.ovpn > /dev/null 2>&1 & TEST ON MY ...
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0answers
64 views

Unable to ssh in to machine behind router

I'm trying to ssh into a desktop which is behind a router from a remote location. I've set the router (TP-link AC1750) to forward TCP connections to port 8000 along to port 8000 on my desktop using ...
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1answer
70 views

UDP Port Fowarding: channel 2: open failed: connect failed: Connection refused

My situation is as follows: I have currently trying to have a program between two Hosts send UDP packets over a SSH Tunnel. There is also a host intermediate between the two hosts. Note Server01 ...
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1answer
46 views

Is port forwarding always used in proxy server, gateway and tunneling?

It seems to me that proxy server, gateway and tunneling all forward traffic that they receive to the actual destinations. So is port forwarding always used in proxy server, gateway and tunneling, or ...
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1answer
487 views

What does port forwarding mean in “SSH port forwarding”?

Wikipedia says In computer networking, port forwarding or port mapping is an application of network address translation (NAT) that redirects a communication request from one address and port ...
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98 views

Which processes do the ports (as communication connection endpoints) belong to in SSH port forwarding?

(1) For remote forwarding: -R [bind_address:]port:host:hostport Specifies that the given port on the remote (server) host is to be forwarded to the given host and port on the local side. ...
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31 views

SHH Tunneling only accepted on some ports

I'm working with Server running Ubuntu Server 14.04. I use Plink to request some reverse tunnels from a remote computer to the server. For some ports that works just fine, but for most ports it seems ...
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74 views

CentOS7 on VMware: How to reach Docker service from Host

I want to access the guests docker services via browser with IP:port/service. For example, I'm running a RabbitMQ, which I want to check. Unfortunately I get a ERR_CONNECTION_REFUSED, when trying to ...
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1answer
61 views

Is a ssh server used in port forwarding considered as a proxy?

In local port forwarding, is the ssh server, client or both proxy (server) ? In remote port forwarding, is the ssh server, client or both proxy (server) ? In dynamic port forwarding, is the ssh ...
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1answer
47 views

How to ssh to a computer using a ddns server

I have Duck DNS installed on my linux machine and I want to be able to ssh to it remotely. The thing is I don't understand the port forwarding step. To complicate things, I live in a large house and ...
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1answer
177 views

Firewall blocking SSH/SFTP connections. How to cheat it?

Hi folks (sorry for the bad english) I'm a college student, and I live in the student's house of my university. I study computer science, and there we have the right to a space in a nfs server to ...
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1answer
45 views

Reverse SSH dynamic port allotment error

When I run: ssh -i mycert -R 0:localhost:80 user@myserver.com and run the following on 'myserver.com': curl localhost:dynamicly_assigned_port I get 'ssh:Server send unrequested port, from port ...
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1answer
152 views

IPTABLES - Bad IP Address

I am trying to turn my Raspberry Pi into a VPN server. To do this I am following this tutorial. The only issue is when it tells to to run this command iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o ...
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2answers
172 views

X11 forwarding Amazon EC2 significance of sequence number in DISPLAY variable

I am X11 forwarding from an Ubuntu instance hosted in a Amazon EC2 to my localhost. I am able to do the forwarding only when the remote (Amazon EC2) DISPLAY variable is set to localhost:10.0 I ...
2
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1answer
263 views

Local port is not accessible with public IP address

I have a linux server which has public IP and Private IP. So, when ever I login with public IP, the terminal directly shows private IP. example: $ ssh root@55.27.XX.XX root's password: ...
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70 views

External port forwarding stop working when VPN is activated

I've a problem with my local Debian server. I use a port forward to allow access from outside my lan to my server. It's works very well but when I activate my VPN (OpenVPN) on my server, the port ...
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1answer
190 views

ssh login with a tunnel through intermediate server in a single command?

Is there a way in a single SSH command to login via SSH to a remote server passing through an intermediate server? In essence, I need to create a tunnel to my "bridge server" and via the tunnel to ...
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1answer
780 views

Difference between “local port forwarding” and “dynamic port forwarding”?

I am trying to understand the difference between "local port forwarding" and "dynamic port forwarding". In the ssh command for "local port forwarding", is it always required to specify the ...
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2answers
2k views

Error when redirecting ports with iptables: No chain/target/match by that name

I am trying to redirect all incoming TCP connections, originally to port 80, to port 8090, because I am running Confluence in 8090 and I want to avoid it running as root, which is a requirement to ...
1
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1answer
136 views

How check a port forwarded from localhost to localhost on.. localhost?

I'm learning about iptables, firewalling, routing and so on. I'm on Linux, Centos7, and I've set up a local port forwarding to localhost with: firewall-cmd ...
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1answer
71 views

Routing server requests using Apache Vhosts?

I have a multiple server setup that I am having difficulty figuring out the best way to solve a problem. I have several domain names that are accessed via a single IP address and served from one ...
0
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1answer
178 views

Forward all traffic from Android to Ubuntu server running privoxy (iptables)

My university has installed a non-transparent restrictive proxy which allows only traffic through 80 and 443 ports. Currently, I have my android phone (Nexus running CM12.1) pointing to my Ubuntu ...
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1answer
806 views

How can I redirect all UDP traffic from one port to another on BSD / OS X?

On Mac OS X 10.9.5 I am running boot2docker and would like to temporarily forward a non-privileged UDP port 69 to port 69 of the boot2docker virtual machine. Virtualbox only supports forwarding ...
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0answers
90 views

Remote SSH into raspberry pi [closed]

I wanna setup Open VPN on my Pi, but first I wanted to check whether I can setup my modem and router (DD-WRT ; linux-based firmware) to port forward to my Pi and test SSH to it in the first place. So ...
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108 views

Accessing forwarded port via SSL/TLS

I have a Raspberry Pi that sets up an SSH tunnel with my VPS so that I can access several things remotely. My Pi forwards its local port 80 to my VPS's port 3180, so I can access it via ...
2
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1answer
46 views

ssh port forwarding without logging in

I am forwarding a port of a remote server to my local mac as follows: ssh -L 15672:localhost:15672 me@example.com When I do this in a shell, I am also logged into example.com. Yet I would like the ...
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1answer
175 views

Why port forwarding does not work in QEMU? [closed]

How to redirect port 5555 of Host OS to port 80 of Guest OS? Host OS: Debian Jessie 64-bit Guest OS: Windows XP SP3 32-bit I'm using the following commands: qemu-system-i386 -enable-kvm \ -name ...
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420 views

Port forwarding with iptables and PIA VPN for single user

I've gotten a Private Internet Access VPN setup on a Mythbuntu 14.04 machine and I am at wits end trying to get port forwarding working with rTorrent (and ruTorrent). My setup is rTorrent running ...
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211 views

How to create a rule on IPCop firewall for bittorrent trafic to work properly?

I've been trying to use my favourite torrent client (µTorrent) after setting up my IPCop (last update 2.1.9) and it warned me that my router/firewall was blocking the traffic and that I had to open a ...
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1answer
2k views

Fedora 21 Port Forwarding with firewalld (firewall-cmd); how does it REALLY work? Or, does it?

Fedora's ability to forward ports using the apparently "native" networking software, firewalld, appears to continue to be broken beyond credulity. Please note that it hasn't really worked since at ...