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.
Related
I own a domain for a website (let's just use "X.com"), which for now I'm hosting on my home computer. This domain name points to my dynamic dns (x.ddns.net) name in the web forwarding of the domain name registrar as I have a dynamic ip and I haven't yet found a better way to make sure that the IP is consistently updated.
I recently changed the ddns address (y.ddns.net) and now whenever I try to access my site either from accessing the main domain name (x.com), or via typing in the local lan ip (192.168.1.56) I keep getting forwarded back to my original ddns address (x.ddns.net) and the website won't load.
I've looked through all the settings I can find both locally, with the ddns provider and with the (x.com) registrar to try to pin point where the forward takes place but I'm totally stuck.
Host system is Ubuntu, everything is up-to-date, nothing in /etc/hosts file pointing to the old ddns.
Thanks in advance for any help.
Try DDNS on Cloudflare
Only problem is that you need to move your domain to cloudflare dns servers which is totally free to use.
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.
I'm working with a third party webservice who requires that all calls to their service are made from whitelisted IP addresses. That is, I must give them IP addresses from which I will be making calls to their service.
Problem is I'm using Google Appengine. Is there any way to get a static IP address when making outgoing http requests from Appengine? Failing that - is there a block of IP addresses that all requests will come from? I could get the entire bloc whitelisted. If this exists, how likely is it to change?
I know I could setup a simple Amazon EC2 instance to use as a proxy (will ask another question for how to do this specifically) but just wanted to make sure there was no other way.
I had the same problem a couple of weeks ago connecting via Urlfetch from Google App Engine to the Stack Exchange API (The team has promptly fixed the problem whitelisting all the GAE IPs).
The range of IP addresses that urlfetch connections may come from, can be found by performing the following DNS lookup:
dig -t TXT _netblocks.google.com #ns1.google.com
Last I checked this wasn't possible. You can get the current IP address dynamically, but it isn't predictable.
Please note: _netblocks.google.com is apparently not accurate. Currently I have noticed that GAE connects from addresses not listed when you dig _netblocks, for example from 8.35.201.166.
This range is not listed in _netblocks, _netblocks2 or _netblocks3.
Current dig output:
ip4:216.239.32.0/19
ip4:64.233.160.0/19
ip4:66.249.80.0/20
ip4:72.14.192.0/18
ip4:209.85.128.0/17
ip4:66.102.0.0/20
ip4:74.125.0.0/16
ip4:64.18.0.0/20
ip4:207.126.144.0/20
ip4:173.194.0.0/16
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 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.