I have a development installation of Gatsby Doc site running on my EC2 server.
When I run the code on my dev machine it works and I can connect my browser to port 8000 and everything is ok..
On my server i check out my github code and
yarn install
npm run start.
Everything builds correctly and Gatsby it listening on port 8000
From my dev machine when I connect using
X.X.X.X:8000 in my browser i receive
Unable to connect
I have opened the port on 8000 in the firewall and I have tested that it works as expected using:
nc -lv 8000
on the server (where gatsby is going to run) and connect using telnet.
on the server i receive
Listening on [0.0.0.0] (family 0, port 8000)
Connection from 84.232.Y.Y 38552 received!
So it works.
When Gatsby is finished starting i see
You can now view gatsbyjs.org in the browser. ⠀ http://localhost:8000/
⠀
when i enter the web address and port i receive
Unable to connect
again. do I need to start Gatsby in another mode?
Kim
I found out.
I just added -H 0.0.0.0 to the start up command and everything works now.
I've setup debug configuration for PhpStorm and it is successfully validated by PhpStorm:
Xdebug helper for Chrome is also installed.
The problem is that nothing happens when I start listening for debug connections and reload the required page with Xdebug helper switched on. Also tried this bookmarklets with no luck.
No errors or something, just nothing.
Also tried to set different IPs as dockerhost: from 192.168.. range (from network settings), from 172.* range (from nginx), from 10.* range (10.0.75.1 is default). Also tried docker.for.mac.internal.host which failed when containers were starting.
Docker 17.02, macOS Sierra, PhpStorm 2017.3
If you're on linux, be sure to create corresponding rules in your firewall.
But to troubleshoot this more effectively you need to gather more info.
Enable xdebug logging xdebug.remote_log=/var/www/xdebug.log in you
xdebug.ini or you can append that in the "Cli Interpreters > Configuration Options" in PHPStorm (xdebug.remote_log, /path/inside/workspace/container/xdebug.log)
Another step you could take is to monitor the incoming connections to your machine. (run this on where you installed docker). It will start listening to all incoming connection attempts on port 9000.
sudo tcpdump -i any port 9000
Now run the debugger once, check the logs inside the container (workspace by default) and see if any incoming connection attempts have gone through from the container.
If you see something like Time-out connecting to client (Waited: 200 ms). :-(, chances are that your firewall is blocking the incoming connections.
To open them up you could add a rule using ufw
sudo ufw allow in from 172.22.0.0/24 to any port 9000 (or write down a specific ip) Be sure to double check that this is the ip trying to connect
this will allow all connections on port 9000 from 172.22.0.* (which is what laradock uses for its virtual networks). Be sure to double check the logs maybe your setup uses different ip range)
My working xdebug.ini (both in php-fpm and workspace containers are the same)
xdebug.remote_host=dockerhost
xdebug.remote_connect_back=0
xdebug.remote_port=9000
xdebug.idekey=PHPSTORM
xdebug.remote_autostart=1
xdebug.remote_enable=1
xdebug.remote_log=/var/www/xdebug.log
xdebug.cli_color=1
xdebug.profiler_enable=0
xdebug.profiler_output_dir="~/path/to/profiler.log"
xdebug.remote_handler=dbgp
xdebug.remote_mode=req
xdebug.var_display_max_children=-1
xdebug.var_display_max_data=-1
xdebug.var_display_max_depth=-1
If none of the above works, another step would be to also check if you have any containers running on port 9000 already. If so, then you'll need to use another, port, just don't forget to expose it from docker.
(Explanation: docker binds (exposes) ports to the host machine so that any incoming connections get directed to the right container, if 9000 is taken, xdebug won't be able to connect to any IDE on your machine, even if the IDE says it is running the listener)
Hope this helps.
I am currently set up using xdebug, PhpStorm & Vagrant.
It works perfect, but when I am connected to the internet through a VPN, the debug page never loads, it hangs on connecting to the page.
Specifically I click Run > Debug, and Firefox browser opens and the page is blank, the tab says "Connecting..." with the spinning icon, the bottom left says "Waiting for {page address}...". PhpStorm gives no indication it is waiting for anything, it looks like it is connected in debug mode.
If I wait for about 5 minutes or more, sometimes the page does load, but it is unusable for debugging purposes, and if I click a link/refresh the page, again it is 5 minutes.
Any idea why being connected through VPN would break it like this?
Andrew, can we get a few more details about your setup?
Without knowing your specific setup, I'm going to guess that the remote PHP app may not be able to connect to port 9000 on your laptop.
Before starting your debug session, you might try setting up a reverse tunnel to allow your remote host to talk to port 9000 on your laptop.
From a command line on your laptop you would do something like the following :
ssh -R 127.0.0.1:9000:laptop-IP:9000 remoteUser#webServerIP
For example, ssh -R 127.0.0.1:9000:192.168.1.29:9000 user500#192.168.0.100
In the above example, your laptop (192.168.1.29) will be logged into the remote server (192.168.0.100) as user500 and will be able to see via the netstat command that it's listening for connections on port 9000 :
user500#192.168.0.100$ netstat -natep | grep 9000
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 500 5189077 -
tcp 0 0 ::1:9000 :::* LISTEN 500 5189076 -
Now you should be able to initiate a debug session with PhpStorm by setting xdebug.remote_host=127.0.0.1 on your remote server in php.ini .
Similarly, initiating a php debug session from the command line while logged into the remote server would look like this -
php -dxdebug.remote_host=127.0.0.1 -dxdebug.remote_enable=1 -dxdebug.remote_autostart=1 my_php_code.php
I'm running linux / CentOS on both my laptop and remote server.
My lab runs RStudio on a server. A couple weeks ago, from my cousin's house, I successfully ssh'd into the server and pulled up the server-side RStudio through my local Firefox browser. Now when I try to access the server RStudio from home (via my own router), it doesn't work. I need help troubleshooting, and I'm guessing it's some problem on the router. I'm running Mac OSX 10.6.8. No idea what the university server's running, but I don't think it's a server-side problem.
Here's how it worked the first time I did it, at my cousin's house: first, I VPN into the university network; then I call SSH with port forwarding; then I open a Firefox browser, connect to my localhost port, and it opens up RStudio on the server side which I can access through my local browser window.
Here's the problem I'm having right now when I try to log-in from my home network:
I can make the VPN connection successfully. I can also set up SSH successfully with this command:
ssh -v -L 8783:localhost:8783 myacct#server.com
Here are the last several lines of the verbose output from the successful ssh command:
debug1: Authentication succeeded (password).
debug1: Local connections to LOCALHOST:8783 forwarded to remote address localhost:8783
debug1: Local forwarding listening on 127.0.0.1 port 8783.
debug1: channel 0: new [port listener]
debug1: Local forwarding listening on ::1 port 8783.
debug1: channel 1: new [port listener]
debug1: channel 2: new [client-session]
debug1: Entering interactive session.
Last login: Mon Sep 2 04:02:40 2013 from vpnipaddress
So I think I'm still succeeding at the VPN and SSH stage (though I don't know why it says my last login was Sep 2 when I've logged in a few times since then).
Next, I open Firefox, and I type localhost:8783, and instead of getting an RStudio server app through my browser window, I get the following errors:
In the Firefox browser window, it says: Server not found, Firefox can't find the server at www.localhost.com, Check the address for typing errors etc.
In the terminal window, it says:
debug1: Connection to port 8783 forwarding to localhost port 8783 requested.
debug1: channel 3: new [direct-tcpip]
channel 3: open failed: connect failed: Connection refused
debug1: channel 3: free: direct-tcpip: listening port 8783 for localhost port 8783, connect from 127.0.0.1 port 50420, nchannels 4
I'm not sure what I've got wrong. I haven't changed anything on my laptop since my last successful connection. I'm on my own router (instead of my cousin's), so maybe I need to mess with the firewall? I already allowed ports 22 and 8783 to come through the firewall to my laptop (I'm not even sure I needed to do that though). Help?
ssh -v -L 8783:localhost:8783 myacct#server.com
...
channel 3: open failed: connect failed: Connection refused
When you connect to port 8783 on your local system, that connection is tunneled through your ssh link to the ssh server on server.com. From there, the ssh server makes TCP connection to localhost port 8783 and relays data between the tunneled connection and the connection to target of the tunnel.
The "connection refused" error is coming from the ssh server on server.com when it tries to make the TCP connection to the target of the tunnel. "Connection refused" means that a connection attempt was rejected. The simplest explanation for the rejection is that, on server.com, there's nothing listening for connections on localhost port 8783. In other words, the server software that you were trying to tunnel to isn't running, or else it is running but it's not listening on that port.
Posting this to help someone.
Symptom:
channel 2: open failed: connect failed: Connection refused
debug1: channel 2: free: direct-tcpip:
listening port 8890 for 169.254.76.1 port 8890,
connect from ::1 port 52337 to ::1 port 8890, nchannels 8
My scenario; i had to use the remote server as a bastion host to connect elsewhere. Final Destination/Target: 169.254.76.1, port 8890. Through intermediary server with public ip: ec2-54-162-180-7.compute-1.amazonaws.com
SSH local port forwarding command:
ssh -i ~/keys/dev.tst -vnNT -L :8890:169.254.76.1:8890
glue#ec2-54-162-180-7.compute-1.amazonaws.com
What the problem was:
There was no service bound on port 8890 in the target host. i had forgotten to start the service.
How did i trouble shoot:
SSH into bastion host and then do curl.
Hope this helps.
Note: localhost is the hostname for an address using the local (loopback) network interface, and 127.0.0.1 is its IP in the IPv4 network standard (it's ::1 in IPv6). 0.0.0.0 is the IPv4 standard "current network" IP address.
I experienced this error with a Docker setup. I had a Docker container running on an external server, and I'd (correctly) mapped its ports out as 127.0.0.1:9232:9232. By port-forwarding ssh remote -L 9232:127.0.0.1:9232, I'd expected to be able to communicate with the remote server's port 9232 as if it were my own local port.
It turned out that the Docker container was internally running its process on 127.0.0.1:9232 rather than 0.0.0.0:9232, and so even though I'd specified the container's port-mappings correctly, they weren't on the correct interface for being mapped out.
In my case, it worked after running the vncserver on linux.
Entered this on linux command line : sudo ssh -L 5901:localhost:5901 -i <ssh_private_key> <username>#<public-IP-address>
Type there vncserver
Go to VncViewer application and connect using localhost:5901
I used to meet the similar problem because 'localhost' was not available on server when it restarted network service, e.g. 'ifdown -a' but followed by only 'ifup -eo1'. Besides server is not listening to the port, you can also check 'localhost' is available or not.
ps: Post it just hope someone who has the similar problem may benefit.
I had this problem when I wanted to make a vnc connection via a tunnel.
But the vncserver was not running.
I solved it by opening the channel on the remote machine with vncserver :3.
In my case, it worked after checking the correct IP address of the user credentials
previously I was using the wrong IP of the server
ssh -NfL 127.0.0.1:8084:127.0.0.1:8888 user#ip_address_of_server
after correcting it, works fine.
Encountered with the same error.
In my case, I found the problem was in the config file of jupyter.
Let's say there are 3 computers named A, B, and C, and A can access B but can't access C; B can access C.
To access jupyter-notebook service of C from A, first I established ssh tunnel from A to C through B, then I access jupyter-notebook by typing localhost:port_number, then I got the error.
Finally the problem was solved by writing the "c.NotebookApp.ip = '0.0.0.0'" in jupyter-notebook's config file, where '0.0.0.0' allows the access of other IPs.
Hope someone in a similar situation may benefit.
I had the same error when I was trying to tunnel my mlflow ui over ssh to view remotely. As mentioned in the first answer, the error arises because nothing on the server is listening for the port. This, for me, is because I forgot to start the mlflow app on my remote machine! So in general – make sure the app you're trying to access remotely is running.
Just replace localhost with 127.0.0.1.
(The answer is based on answers of other people on this page.)
This means the remote vm is not listening to current port i solved this by adding the port in the vm server
I am trying to run putty on Windows 7.
I need to run some SSH commands to upgrade Magento. Every time putty gives me this fatal error:
network error: connection refused
I have even tried to use it through winSCP. Note that putty is running fine on my client's side, but for me it's giving me that error every time.
I tried using port 22, 23 and a few others without success. I have also tried with Windows Firewall both enabled and disabled.
Thank you.
Install open-ssh or ssh in target Linux machine solved my problem .
Use below commands:
sudo apt install ssh
sudo systemctl status ssh
sudo systemctl enable ssh
The following are the list of possibilities of this error:
1) Common cause is - Your IP is blocked or not whitelisted in the server which can be done by editing the file at /etc/csf/csf.conf
2) Disable the windows firewall settings and check..
The above two things should work in most of the cases
3) This is very unusual and when the above two options fails it is very difficult to find the solution
In this case the traceroute to the server host or IP works usually but putty fails
port 22 looks normal and working but connection fails and restarting SSH (service ssh restart) also does not work
reboot or restart the server but still fails
Adding IP in firewalls or whitelisting the local IP may not workout
This case generally happens when the server is migrated or new server. IP of the old server might be whitelisted locally, but don't have port 22 open, or some other local filtering is occurring for this new IP but not the old server IP..
In this case you need to change the port to some 522 or 530 some unusual port will help in sorting it out.. The same port you have to use for the SFTP connection also .. where as FTP connections works normally..
or you have to whitelist the IP locally or open the TCP in and out to port 22 if you want to use the port 22..