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One of our DBs is behind firewall.
I could not use it through its natural port 1521.
I also know the same machine is accessible through the SSH port ( 22)
My friend showed me BitVise SSH Client, so that by tunneling through the SSH port , I accessed the invulnerable 1521 port and used my favorite Sql Developer tool.
My question is , how do you tunnel some data through the SSH port, what is the mechanics ?
I.e. is there some SSH command like, "after successful login pass the data as is to the given port"
You need to use a SSH client to connect to the Bitvise SSH server. Bitvise also has a client product called Bitvise Tunnelier that you can configure to use port forwarding. You would configure Tunnelier to listen for and forward a specific port (the SQL connection in your case). Then, you would configure your SQL Dev Tool to connect to localhost: and connect.
More information about Bitvise and port forwarding:
https://www.bitvise.com/port-forwarding
This link will show you how to use Port Forwarding with Remote Desktop, but you can adapt it to use it for SQL, etc:
https://www.bitvise.com/remote-desktop
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I have an Apache Web Server installed on Ubuntu 16.04 in a VM, the problem I'm having is that my server doesn't seem to have its own IP address. I tried using hostname -I but only a blank line appears, while ifconfig shows 127.0.0.1 and 10.0.0.2.
The problem I suspect is that it's related to the network settings of my VM since when I imported it to the computer laboratory at school, the commands hostname -I and ifconfig showed an IP address like 192.xxx.x.xx, I tried searching around but I can't find similar problems where the host machine is connected to a router via wireless connection. What can I do?
EDIT:
VM software being used is Oracle VM VirtualBox Manager
Network Settings:
Because "Bridged Adapter" is used the router acts as DHCP server.
There are 2 solutions if you want to access a server located at VM from host without network connected:
Set adapter as Internal network see details
Note: in this case Internet cannot be accessed through this interface.
You would probably like to add another Bridged or NAT adapter to acceesss external network
or NAT details (how to setup)
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i want to visit my xampp localhost from my server ip. my broadband internet provider does not allow me to forward any port so i need to do reverse tunneling. so if some one visit 216.158.xxx.xxx:27272 (my vps ip is 216.158.xxx.xxx) he/she will see my pc contents of 127.0.0.1:27272
i m using putty on my pc and centos 7 on my vps server.
i try to configure putty by going to ssh tunnel
source:27272
destination: 127.0.0.1:27272
its not working
i have set GatewayPorts yes on my vps
EDIT: I have fixed this problem
You have to open the port 27272 on your VPS. If it has a static IP-address configuring the firewall might be enough. This gives everybody public access.
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I am using PuTTY to connect to an intermediate Linux based server. On that server I use ssh to connect to the (Linux based) server I try to target. On that server I want to run a program, but I have to send it to that inner server from my PC. A direct connection is not possible.
At the moment I use PSFTP to the intermediate server and PuTTY+sftp from the intermediate server to the inner server to send the file, but this takes a lot of work to do everytime.
Is there a way to use FileZilla to set up an SFTP connection to the inner server through the intermediate server?
So in stead of:
PSFTP: PC -> user#intermediate
PuTTY: PC -> user#intermediate
sftp: user#intermediate -> user#inner
I want:
FileZilla: PC -> intermediate -> user#inner
You can setup an SSH tunnel (aka port forwarding) using PuTTY from the intermediate server to the target server and connect with FileZilla to the tunnel.
See details on port forwarding in PuTTY.
Or see a specific guide for setting up port forwarding to tunnel file transfer client (WinSCP particularly, though you can apply it to FileZilla easily).
Actually, WinSCP SFTP client has a (single step) tunneling functionality built in. So, with WinSCP, it is very easy to do what you ask for. See the Tunnel page of its Advanced Site Settings dialog.
(I'm the author of WinSCP)
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I'm trying to set up an sftp on a networked server. I can access the machine through the outside world by first ssh'ing into a network login server through the following process:
ssh [network-username]#login.server.co.uk
then, once logged in
ssh [server-username]#[hostname]
Is there anyway to sftp into the networked server? I cant find a way to add the initial step into the login process.
Thanks!
You have not specified what SFTP client you are using.
In general, some SFTP clients DO allow SSH tunneling.
WinSCP for instance.
See Connect to FTP/SFTP server which can be accessed via another server only.
OpenSSH suite allows that too.
For example see Forward SSH traffic through a middle machine.
(I'm the author of WinSCP)
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I am trying to log in to my computer at work through cyberduck.
I can ssh into the computer just fine but I must first SSH into the central system, then ssh from there into my computer.
Is there a way to allow Cyberduck to ssh into my work computer, i.e. ssh twice at once?
You can use e.g. PuTTY to set up the port forwarding, also called an SSH tunneling (for purposes such as yours).
See https://the.earth.li/~sgtatham/putty/latest/htmldoc/Chapter3.html#using-port-forwarding
Alternatively you can use an SFTP client that supports this natively, e.g. WinSCP.
There's a guide for this here:
https://winscp.net/eng/docs/guide_tunnel
Note that aside from instructions, how to do this using WinSCP native tunneling functionality (section Section up tunnel in WinSCP), the guide also shows, how to tunnel WinSCP via PuTTY (section Section up tunnel using PuTTY for SFTP/SCP session). So if you insist on using Cyberduck, you can just replace WinSCP with Cyberduck in the guide.
(I'm the author of WinSCP)
Yes, you can configure local port forwarding. With it, localhost's socket will be forwarded to your work computer so middle SSH server will work as proxy.