I can't find the ip address without the aspx page (so on a linux server). If it can work through wcf then its also good.
I think your best bet is to let a web service return the IP address to the Silverlight client if you are able to use WCF in your application. I don't believe there is any straightforward way to get the client IP directly within Silverlight.
Just a simple web method like this should work:
[OperationContract]
public string GetClientIpAddress()
{
return HttpContext.Current.Request.UserHostAddress;
}
You might not be able to get the actual client IP address if the request is going through a proxy server, but you could check the HTTP_X_FORWARDED_FOR header as well and use that if available.
HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
I wouldn't depend on that as a reliable client IP address though, since not all proxy servers honor that HTTP header and it could also be easily spoofed.
Related
I've a simple webserver bound on 0.0.0.0:3000 on my machine which works as intended on local networks. By local network I mean to say, if my mobile or any other device is on the same network, it can access local webserver by going to the IP assigned to my machine and adding port 3000 to it. Eg 192.168.1.4:3000.
Now I've to expose it to the internet but not through some sort of 3rd party application like ngrok, localtunnel or browserSync. I know that these applications work perfectly, but since I've my own pet project of controlling home appliances, I don't want to rely on availability of 3rd party services. So the current state is, I cannot control it through the internet. Keeping in mind I don't have a static IP otherwise this would've been easier.
I already have a vps and a domain name assigned to it. I can send my currently allocated ip address (since it is dynamic), by using getifaddrs, to my server and keep track of it. But how do I expose my local server to the internet through it? Those 3rd party applications assign some sort of subdomains to each exposed server, and I'll be able to assign subdomains too, but I'm still not getting any way to expose the local webserver. Any help would be appreciated, thankyou :)
Step one, you need to expose your webserver at your internet access router.
Typically this requires you to configure port forwarding for (in your case) port 3000.
With this done, any client could access your service via (current external dynamic ip):3000
Step two, you need to dynamically map a fixed DNS name to your current dynamic ip. There are of course third party services (such as DynDNS) that would help you map yourfavoritename.dyndns.org to that ever-changing ip address.
If you want to do the latter without 3rd party, you need to have some static (web) server somewhere and could proceed as follows:
Clients visit http://www.yourstaticserver.example/ and that server redirects them to (current dynamic ip):3000.
Of course, for this to happen, your static server needs to know the dynamic ip and needs no find out about changes to it.
To this end, you could have your internal server contact the static server on a regular interval (such as once a minute), say, have it access http://www.yourstaticserver.example/some-secret-special-page and the static server always stores the REMOTE_ADDR of such a request (preferably with some authorization!) for its future redirections.
Actually, there is a step zero before step one: Be aware that exposing your server to the Internet means that you expose your server to the Internet. So I hope you have invested enough thought into security.
Using the windows host file located in
windows/system32/drivers/etc/host
Is it possible to respond a request from an application like when it is offline(not connected to the Internet)? Could you please give an example of this is done.
The hosts file only lists aliases for ip-addresses. For example:
192.168.0.1 foo bar foo.com bar.com
If that line is in the hosts file, then you can use the host-names foo, bar, foo.com and bar.com to reach the computer with ip-address 192.168.0.1.
If the computer, or the service you want to reach on that address, is not online, you can't reach it no matter what you have in your hosts file.
If you are willing to map your local development environment to a domain name, you can edit the domain name in hosts file and map it to 127.0.0.1, which is the loopback address.
That way, any requests done to that particular domain will fallback to your local machine.
You can also assign different LAN/WAN IP addresses.
When your development phase is done, you can remove the entry.
I would not recommend doing so, stick with the localhost and just make use of that to test virtualhosts setup or some sort of domain based configurations.
If there is anything else I can answer, please don't hesitate to post further comments on my answer.
If you mean to respond to HTTP requests then you need a Web Server configured to respond to any host (or that specific host name) on port 80. If you are not using it for anything else IIS can do this1 – configure it to return 404 (not found) or some other relatively neutral fail response.
1 If IIS is already being used then things get much harder, later versions of IIS are more flexible either with a combination of using HTTP.SYS to allow other applications to respond to certain URLs or using different Web Sites in IIS (until Windows 7, or maybe Vista, only available on Server editions of Windows).
I am using Nokogiri to screen scrape a few websites.
My website is hosted on US servers, and so when it fetches the website, the website responses as if the user was a US user. I need the website to responds as if I was an Australian user, even though the server is located in the US.
When running locally it works fine because locally it responds as if it was Australian.
How can I read the site using Nokogiri as if I was from another country?
You have to run your requests through a proxy in Australia.
This doesn't have anything to do with Nokogiri - it applies no matter how you're trying to scrape a page. HTTP travels over TCP, which is a bi-directional protocol so you can't spoof its IP address. If you tried to spoof the IP address of a TCP packet, you would never get your response back.
You can configure Tor to always use exit nodes from a specific country. Please, however, do not use this method if this will put the Tor network under some serious strain (i.e. fetching the pages continually); in this case please consider buying an (Austrlia-based) annonimizing service (or simply a proxy).
I would like to know what the ip address of a Silverlight 4 out of browser application. This would be the ip address that is on the internet, not the LAN ip. I am communicating with a WCF service that is NOT hosted by IIS but by my own Windows service.
I'd say the best way is to send a request off to a really dumb web service whose sole job is to return the IP address of the requester back.
It'd be async, though, so that may not be great depending on your scenario. And of course if the IP address changed (DHCP renewed, say) then you wouldn't know to go ask again.
Why do you want to know the client IP address? Maybe there's a way to solve your problem without needing to know it.
I need one server to receive ip requests from clients(there are not in the same intranet), and I can
route all the response packets to a special gateway server, and then I send the response packages to
clients after some processing. it is like VPN, but I want to do some development based one
opensource project, so i can control it myself.
any suggestion? thanks!
There is OpenVPN which is as the name already suggests open source.
You could set up the server on the local one as a kind of proxy (or reverse-proxy depending on your viewpoint) and have the clients connect to it.
It depends what protocol you're using, maybe it has explicit proxy capability or you can get an existing proxy program, or just proxy it using a simple socket forwarder program.