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37
votes
2answers
41k views

How to create a restricted SSH user for port forwarding?

ændrük suggested a reverse connection for getting an easy SSH connection with someone else (for remote help). For that to work, an additional user is needed to accept the connection. This user needs ...
14
votes
2answers
27k views

How to open a particular port in ubuntu?

My SoulSeek client Nicotine+ checks my open ports during initial configuration and promts that the one port number it needs is closed, cutting me off frmo about 50% of the users. Is there anyway I can ...
7
votes
2answers
20k views

How to SSH on a port other than 22

I have two computers behind the same router. Let's call them A and B. A can SSH to B in the following manner: ssh usr@<internal ip of computer> B can SSH to A by doing the same, but the ...
5
votes
2answers
5k views

Port forward to a port on the same machine

I used to run a service on port 25570 I'm now changing it to run on port 25565 but I still want people who try to access it on the old port to have access to the service. So I'd like to forward port ...
5
votes
1answer
504 views

Finding URL to VirtualBox Ubuntu Apache2 server

I am new to Ubuntu and have Apache2 running in a virtual box on my machine. I am trying to access this server on my Windows machine.. I am assuming that I need to find the ipAddress and the port to ...
4
votes
5answers
26k views

ssh: connect to host myremotehost.com port 22: Connection refused

So I am trying to get ssh working on my server. I can connect on my local network with the local ip address of the server perfectly fine. When I try to connect remotely (through a domain name that I ...
4
votes
2answers
474 views

How to tunnel traffic from one machine to another?

I have a server, which can be seen from outside of my small network, sever has domain name and such. And I have a local machine, which can be seen by server, but is not accessible from outside. So I ...
4
votes
2answers
12k views

Port Forwarding to Connect to MySQL Database of VirtualBox

I have Ubuntu 10.04 as host machine and Ubuntu 10.10 as guest machine installed in VirtualBox. I had success on port forwarding to connect to Apache of guest machine, so that now I can open in host ...
4
votes
2answers
5k views

ssh -L (error: bind: Address already in use)

Pretty simple, I know that this has happened to me before. Couldn't find a good answer on AU. I was running an ssh session with ports bound: ssh -L 3000:<server_name>:22 I just lost my ...
4
votes
1answer
2k views

Error when doing port forwarding with iptables?

I've got a fairly standard ubuntu install and looking to add a port forward. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ...
4
votes
3answers
1k views

Is it needed to set Static IP and Port to get best performance from Transmission?

I've recently migrated to Linux from Windows and I work on Ubuntu 12.04 LTS. I am trying to preserve my usual habits of Windows so that I can use Linux more regularly. One of those habits is P2P ...
4
votes
1answer
5k views

connect to vpn via another port( change pptp client port)

as you know pptp port is 1723 by default,know I forward port number 21 to 1723 on my CentOs VPN. Know I wanna connect to my vpn (pptp) from port number 21. How can I do it?
4
votes
1answer
217 views

How to access a port on a remote server using SSH?

I have a service running on a certain port at the server. What I want to do is, access the server using SSH and use a local (client-side) program to access the server's port. Is that possible?
4
votes
0answers
280 views

how do you configure ubuntu to run only with tor [closed]

I have a problem. I'm trying to port forward and get a similar error msg, I type this in:ssh -N -L 9050:10.0.2.2:9050 root@10.0.3.1 and then I get this msg:ssh: connect to host 10.0.3.1 port 22: No ...
3
votes
1answer
2k views

How Can I Open A Port On Ubuntu?

Ubuntu 13.04: No LSB modules are available Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring I'm attempting to open port 8888 on an Ubuntu VM that I'm ...
3
votes
1answer
3k views

How do I set up an SSH SOCKS proxy with Gnome SSH Tunnel Manager?

Generally I use this command to create a local Socks proxy via SSH Tunneling ssh -ND 7777 -i google.pem ubuntu@107.20.x.x Then i configure my applications to use Socks proxy on localhost (i.e. ...
3
votes
1answer
479 views

How to forward ports on the same Ubuntu machine? I want my webserver be available on 80 and 8880 port

How do I forward ports on the same Ubuntu machine? I want my webserver be available on 80 and 8880 port. Or maybe I could making my apache listening not only on 80 port, but also on 8880? Is that ...
3
votes
3answers
2k views

SSH from external network refused

I've installed open-ssh-server on my home computer(running Lubuntu 12.04.1) in order to connect to it from school. This is how I've set up the sshd_config file: # Package generated configuration file ...
3
votes
1answer
111 views

Create multiple aliases for localhost addresses on different ports

I have some webapps running on my localhost that I can access by my web browser at different ports. For example I have an IPython notebook server running on port 8888 (I can access it at ...
3
votes
2answers
890 views

One IP address, Two Websites, on Two Machines - Need details

This question has already been posted by another user but a detailed answer was not given.. Here is the link to the original question - One IP address, Two Websites, on Two Machines I have two ...
3
votes
0answers
512 views

How to prevent autossh from becoming stuck once in a while?

I am using autossh to build a reverse ssh tunnel but from time to time the tunnel stops working and I need to kill autossh and start it again. /etc/cron.d/autossh @reboot autossh -f -nNT -R ...
2
votes
3answers
20k views

Simple port forwarding

I am in a bit of trouble as I am trying to setup a reverse proxy with and a second server. My idea was to get the firewall to forward https to the reverse proxy and port 29418 (gerrit ssh) to the ...
2
votes
2answers
9k views

Desktop sharing - which port to forward?

I'm trying to share my desktop with the integrated tool Desktop Sharing Is there ports to forward on the router, and which ones ?
2
votes
1answer
814 views

How can I open my Meteor app's port to the local network

I'm running a MeteorJS app on localhost:3000. I'd like to allow other computers connected to my network access to view the app by visiting my IP address. Any ideas on how I can do this? EDIT: I'm ...
2
votes
1answer
9k views

How to know actives ssh port forwarding

I have configured in ~/.ssh/config many port forwarding for VNC with different port for each servers. Is there a command which can help me to know which port is forwarding to when I open an SSH ...
2
votes
2answers
46 views

Forward Internet connection over ssh to remote computer

I'm struggling to access the internet from my remote computer. I'd like to access the remote computer via ssh and have there the internet connection available to install packages etc. It looks like ...
2
votes
0answers
276 views

Port redirection for a specific (dynamic) IP using iptables script

What I want: Incoming TCP and UDP connections on port 900 from the resolving IP address of myip.dyndns.org (dynamic IP) should redirect to port 5050 on the local machine. All other IP addresses ...
2
votes
2answers
8k views

How to test whether port forwarding is working?

I have done port forwarding on my computer but I don't know how to test it. Can anyone help me? I have not done it using iptables but I have done it by following the instructions given in this link.
1
vote
2answers
2k views

Alternative for Xshell.

Do anyone knows an alternative for xshell? I have checked and the alternatives mentioned are putty, openssh etc. But I require it mainly for port forwarding and for that xshell works perfectly. Is ...
1
vote
2answers
5k views

redirect port 80 to 8080 and make it work on local machine

I redirected traffic for port 80 to 8080 on my machine with sudo iptables -A PREROUTING -t nat -p tcp --dport 80 -j REDIRECT --to-port 8080 It works fine for all world except my own machine. I am ...
1
vote
1answer
3k views

Port forward in terminal only

I have an old Ubuntu server (13.04), and want to open a port for this online game server style software for a mate. I need a port open, and to tell it that port (I know how to tell the game that ...
1
vote
1answer
837 views

remote desktop only works locally

here's my problem, I want to be able to remote control my grandparents computer in order to help them without having to drive 20 minutes to get there. however I can only connect to their machine when ...
1
vote
2answers
67 views

Can Port Forwarding to a Windows VM cause Security problems? [closed]

I have question. My physical host is Ubuntu 14.04. I installed Virtualbox with a Windows Server 2012 VM with IIS. I set port forwarding from my Ubuntu host to my vm. If my virtual Windows Server ...
1
vote
1answer
96 views

How can I open ports?

I want to open a port, specifically port 32887 for TCP, used for Ace of Spades (buildnshoot) game. I created a server (I can access it from 127.0.0.1) but my friends can't join me. It looks like a ...
1
vote
3answers
124 views

My website is accessible on my home network but nobody else can access it on the internet

this is my first server I've set up so bare with me if I lack any important details. I have set up my ubuntu server and have my site working on my home network, I am able to see my website on all ...
1
vote
2answers
918 views

Forward port to LXC guest using UFW

I am trying to forward port 2222 on my host 192.168.2.252 to a LXC guest on 10.0.3.11. How do I do it using the UFW-framework? In other words I want to do this but with the ufw-framework. iptables ...
1
vote
1answer
641 views

IP/PORT forward requests to another server

I have the following listening PORT:IP set up on my UBuntu server. 12.345.67.890:3636 It receives requests perfectly, however, I would now like to forward any requests to that IP:PORT to another ...
1
vote
1answer
235 views

Sharing Ubuntu Desktop on the Internet

At home, I have Ubuntu Linux 10.04 on a spare laptop and a DSL connection that's always on. What are the steps to securely (very important) share this on the web with like DynDNS or something and port ...
1
vote
1answer
1k views

Redirect Sound output to a specific port…Realtek?

I am nearly as much of a noob about Linux/Ubuntu as one can be... currently dual booting side-by-side with Win 7 Pro 64 bit. That being said... system has a 5.1 surround sound card. The main regular ...
1
vote
1answer
260 views

How do I restrict ports to certain users?

Alright, well, what I wanted to do was to allow my users to only be allowed to access a specific port, In example, UserA can only access port 2004 While UserB can only access ports 2009, and 2010 To ...
1
vote
1answer
124 views

How can I make sure my server is connecting through my router?

I have a Ubuntu server with PHP, Apache2 and all of that setup and working on my LAN. Meaning from any computer connected to the same router I can connect to 10.0.0.3 (My server). I have setup my ...
1
vote
0answers
27 views

Why can't I connect to my localhost port from a remote computer?

I'm using link-grammar server to convert sentences into semantic graphs. It provides an API though a port to do the above process. It's configured to works through port 9000 of localhost. I used to ...
1
vote
0answers
26 views

SSH outside the local network

I have Ubuntu 14.04 LTS installed on a Toshiba Satellite L655. I've recently installed an SSH server on the machine and it works fine when connecting to it using 192.168.1.3 but when I try that using ...
1
vote
0answers
27 views

how to open a port under Ipv4 instead of Ipv6

How I can open a port under Ipv4 instead of Ipv6 on ubuntu tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN - tcp 0 0 127.0.1.1:53 ...
1
vote
0answers
92 views

Linux Web Server Dosen't always allow external connections

I have been having this problem with where it will allow external connections for about 30 minutes but then doesn't allow any? I have port forwarded and all that. I turned it on last night and I ...
1
vote
0answers
241 views

How to create a static wifi with hostapd UBUNTU 14.04?

I am trying to connect my android phone with wifi ubuntu. Things I have tried: 1) ap-hotspot -> , phone stuck in obtaining ip address, then avoided due to poor internet 2) manually configured ...
1
vote
1answer
561 views

I can't get my ubuntu server VirtualBox guest with bridged adapter seen outside of my lan, although port forwarded to 80

I have installed Ubuntu Server 14.04.1 on VirtualBox. With LAMP all configured. The box has static ip 192.168.1.104 and bridged to my host's Wireless adapter. I can successfully access Apache's index ...
1
vote
0answers
175 views

Port forwarding out multiple VLAN interfaces that have same IP address

So I have an Ubuntu machine with multiple VLAN on an interface eth1 and each VLAN has the same IP address (172.16.0.2). I need to be able to simultaneously telnet into a rack of devices that are also ...
1
vote
1answer
1k views

Dnat prerouting does not work on Ubuntu 14.04

I've got a Ubuntu 14.04 server used as firewall, router, dhcp, dns and proxy. Everything works properly from inside to the internet, but the forwarding from outside to the inside network doesn't work. ...
1
vote
1answer
494 views

Redirect requests to my external IP/port to a internal IP/port?

I have a dedicated server running KVM virtualization with n public IP addresses dedicated to n-1 web-facing virtual machines. Now I'd like to set up some web-facing VM's that don't have a dedicated ...