I need to get the original endpoint configurations from the .csdef file, how can I do it?
I cannot use RoleEnvironment.CurrentRoleInstance.InstanceEndpoints, because it gives me the internal/local port in the virtual IP. But I need to know which is the port is being shown to the public.
For example I have a FTP server with a tcp 21 end point, but when I check at runrime to that collection it can has something like tcp 5100. When I bind the FTP server to tcp 5100 and access the server through, for example, 127.0.0.1:21 it works perfectly.
But for example, when I need to establish the PASV mode, I have to send back the IP and port where the client should connect. I'll work out the IP, but how could I know the port that has been configured for PASV? the port in the previous collection is not ensured to be the same that is exposed in the public interface.
So basically, how may I get the original .csdef configuration?
Cheers.
I'm not sure if this works with FTP but when using HTTP, it will returned the inner address and port if using HttpContext.Requst.Url. I was using Header["Host"] instead. Hope this helps.
Related
I am trying to access my local [WAMP] webserver from any remote devide. I am so far able to access it from a device inside the LAN, but fail to do so from outside it. As far as i know, port forwarding is how we achieve this. But currently unable to do that correctly.
Present error when trying to connect :
Some of the articles which i have followed so far are:
general-port-forwarding-guide
how-can-i-access-my-server-from-outside-of-my-lan
how-to-expose-a-local-development-server-to-the-internet
The main steps which i follow are as follows:
Make sure server is accessible inside LAN.
Open router's port forwarding settings and port forward the set static ip address (in step 1). Set port 80 and 8080 for communicating.
Access the server via my public ip (can check public ip and if forwarded port is accessible from here)
This is a temporary solution for testing purposes only with 8 hour server connection duration time limit (and a limited no. of server connections):
access_local_server_remotely_for-Development-And-Testing-Only and here is a video guide about how to use it.
I have setup a simple HTTP java server running locally on port 8000. It simply prints a message "Hello world" when a request comes. When I try to ping it from the browser by running http://localhost:8000/test I get my message printed.
I want to get the same results from another computer that is not local. When I try to use my public IP lets say http:/43.xxx.xxx.xxx:8000/test (even from the same machine) I get an ERR_CONNECTION_REFUSED .
I probably suspect that has something to do with the firewall. Can anyone guide me a little more because I lack the experience?
Thanks in advance
You don't specify what host OS your server/firewall is running so I'll keep this generic...
Without knowing your application, it seems like the server is sending a reset (RST packet) when the first SYN packet shows up indicating that the port (on that interface [your external]) is closed. You can do a quick port scan from here (https://mxtoolbox.com/PortScan.aspx) if you don't have access to a remote machine to test with. Odds are, TCP/8000 will not be open.
If it is, in fact, closed, you'll have to look at the firewall that your host OS is running and find out how to allow TCP/8000 to your host. In a major firewall vendor, your rule would look similar to this:
Source: Any
Destination: Your Public IP Address
Service: TCP/8000
Action: Allow
Logging: Full
That being said, you mentioned this was a PC so look into "iptables" (if you're running *nix) or the Windows Firewall (if you're running Windows) on adding firewall rules (Unfortunately I just joined and can't ask questions/comments, yet).
If you really want to find out what packet is being sent, run a tcpdump on your external interface (let's say eth1) (assuming your remote IP is 1.2.3.4 and your home public IP is 4.5.6.7):
tcpdump -nn -vvv -e -s 0 -X -c 100 -i eth1 host 1.2.3.4 and host
4.5.6.7 and port 8000
Here you're looking for the SYN/SYN-ACK/ACK for a successful TCP negotiation or SYN/RST if there is a firewall rejecting (not dropping) the TCP stream to the port.
Once the port is open on the host OS firewall, take a look at the application to make sure it's configured properly. If this were a standard webserver, you could take a look at the configuration files for the "Allow from" directives to make sure that everyone can access the site. If this is a custom application that you've created, you'll have to check this yourself.
I finally solved my problem. I needed to open a forwarding port in my router that maps my local ip address to the public. My router is TP Link so this what I did:
http://www.tp-link.com/us/faq-72.html
Also in order for this to work every time and not to have to reconfigure this every time I reconected to the router (because I get a new local IP), I have created a static local ip for my server following this guide:
http://www.tp-link.com/us/faq-182.html
Thanks for all the replies.
I am trying to make my XAMPP server public on the internet. But when i try to access it using my ip adress it says connection refuzed. I have followed lots of tutorials but most of them are for older versions. I have set the 80,443 ports on and have added them as a firewall exception but it still not working. Can you please give me some sugestions?
The idea is the same no matter the version of XAMPP you are using.
It's not clear if you configured port forward on your router (all connections on ports 80 or 443 will be forwarded to the XAMPP "server"). You should do this orderwise the incoming connection will never be redirected properly.
I am not sure if ISPs can block external access to ports 80 or 443, but you can also configure an alternative port, like 8000, to be forwarded to 80 internally, then you access your server using http://[your_public_IP]:8000
There are some sites you can use to check your public IP, like: http://whatismyipaddress.com/.
Let's assume I'm in computer A, I have a few servers running on different ports, but all are basically an instance of the same program (just binding to different ports). Now, computer B, a client, does he need to know what port is the software he wishes to connect to on computer A?
The point is, I am implementing some sort of communication similar to sockets. Everything should work fine but I'm not sure how to create the initial-message from a computer to another - I just don't know to what port to send it to. Does the client know the port he's sending to on the server?
Say here (client): clientsocket.connect(('localhost', 8089)), does the client connect a server running on port 8089? If so, what port is his socket on (what port is he using for the client?
Yes. The only way for the network stack on computer A to know which process to deliver an incoming packet is for computer B to set the correct port in the packet. A web server runs on port 80 by default, but a machine running several distinct web servers will run them on distinct ports, and a client must be specific about which server they want to connect to. http://example.com, http://example.com:8080, and http://example.com:12345 would refer to the servers running on example.com on ports 80, 8080, and 12345, respectively.
In order to know which port to use in your client, you need to read the documentation for the server you want to connect to.
Going in the other direction, the port used by the client to receive responses is typically set by the networking stack automatically. The client doesn't need to do anything special to set it, and the server simply sends packets back to the address/port found in the source portion of the incoming packet.
I have a web server running out of my home. I have assigned it an address such as 192.168.1.123 on port 80.
I understand that this is running on my local network. If I go to another computer on my network and type in the server's ip address, I can see the server.
Is there a way to access this server from outside my LAN?
Yes, you need to set your router to forward connections to port 80 to your internal IP address (192.168.1.123). Look for Port Forwarding on your router admin screen which I would imagine you access by going to http://192.168.1.1
Keep in mind that your ISP may block port 80 completely in which case you can run your web server on a different port (for example por 8180) and have your router forward connections to port 8180 to your internal IP.
To access your server from outside, you just need to point your browser to your external IP address which you can find out by going to http://www.ipchicken.com
Assuming you have a connection to the internet:
https://github.com/progrium/localtunnel
is a quick way to access your local server from the internet. There might be similar implementations in other languages/platforms. This is just the one I know about.
Remember that security issues need to be carefully considered when opening your local network to the world.
If you use a PHP Webserver you can set it this way:
php -S <YourIPAdresse>:<SomePortNumber> <StartPHPpage>
Example: „php -S 192.168.1.123:9000 index.php"