After clearing the browser cache, cookies and web related data. I simply typed Gmail.com in the URL field of the web browser and I captured the packets in wireshark.
I found that the web browser initiated the request for Gmail.com with dest. port as 443 (HTTPS).
I want to know how the web browser got to know that the web site has to be opened in HTTPS mode. I thought it will be sending the request first to port 80 (HTTP) and then there will be some sort of redirect or another handshake.
That's because of Strict Transport Security. A special header is set by the website indicating that it should only be accessible over HTTPS. Try opening it in a new incognito window and it will open over HTTP.
Here's a guide how to clear HSTS in the major browsers. For example in Google Chrome you may try opening this url chrome://net-internals/#hsts and remove gmail.com from the HSTS cache.
I have to capture http request from charles. I am able to get normally. One site that is not working in my ip address, so I am using proxy I set proxy in my mozila browser. After setting proxy in browser charles is not capturing site calls.
What I have to do to make it happen , As well I tried in fiddler as well. Please help me to sort out.
Thanks
For fiddler you can download certmaker as you need a certificate in most cases for secure traffic:
http://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/ConfigureForAndroid
I have a client program running locally in iPhone emulator and local server written in Java. Client talks to server with JSON over HTTP requests. Now I am trying to record a client session http requests with JMeter to use them as a base to load-test server.
The problem is client requests do not go throw JMeter proxy. Client gets 501 "Method not implemented" (it is not because of https, I am using http). There is nothing in JMeter log about the request, and obviously nothing gets recorded in JMeter and the request doesn't reach the server.
There is well-described steps to setup JMeter proxy to record request from a browser, but my client programm is not a browser. Though JSON over HTTP is widely adopted approach, I could not find anything on the web about recording such requests with JMeter. I understand I need to do on the client the same thing browser does when proxying request and what I've found about it is that I need to set Host header to server's host and port, but that did not work and I cannot see how is it related to 501 error client gets.
If someone can explain what should be done on client or how to configure JMeter to let it know where to proxy client's requests or link any manual explaining that, it would be great help. I've been searching for solution for a few hours already and had no luck. Please help.
You can see my question and the answer I got below:
Use Jmeter proxy to record HTTP calls from iOS simulator
In short:
With this tutorial you can record calls from your Android device:
http://blazemeter.com/blog/load-testing-mobile-apps-made-easy
For make same thing with iPhone, do the following steps:
Mac configuration:
system preferences -> Network -> Advanced.. -> Proxies -> check "Web Proxy (HTTP) ->in "Web Proxy Server" field, type your IP (http://www.wikihow.com/Find-Your-IP-Address-on-a-Mac), and choose available port (I using 8080) ->ok -> Apply
iPhone configuration:
Settings -> WiFi -> choose same wifi you use with your Mac -> press on it again to go to it's details -> scroll down ->In HTTP proxy, choose Manual -> server = your mac IP you found earlier -> port = the port you chosen (maybe 8080)
Now You can start recording all "iPhone network out" using jmeter recording controller
I need to monitor my application from incoming http POST and GET requests originating from outside and sometimes inside the machine.
Is this possible?
Been using fiddler but this only does outgoing not incoming (from outside the machine) or have I configured it incorrectly?
This is for my web app that is meant to be receiving a POST from an external server.
What you need to do is configure Fiddler to work as a "reverse proxy"
There are instructions on 2 different ways you can do this on Fiddler's website. Here is a copy of the steps:
Step #0
Before either of the following options will work, you must enable other computers to connect to Fiddler. To do so, click Tools > Fiddler Options > Connections and tick the "Allow remote computers to connect" checkbox. Then close Fiddler.
Option #1: Configure Fiddler as a Reverse-Proxy
Fiddler can be configured so that any traffic sent to http://127.0.0.1:8888 is automatically sent to a different port on the same machine. To set this configuration:
Start REGEDIT
Create a new DWORD named ReverseProxyForPort inside HKCU\SOFTWARE\Microsoft\Fiddler2.
Set the DWORD to the local port you'd like to re-route inbound traffic to (generally port 80 for a standard HTTP server)
Restart Fiddler
Navigate your browser to http://127.0.0.1:8888
Option #2: Write a FiddlerScript rule
Alternatively, you can write a rule that does the same thing.
Say you're running a website on port 80 of a machine named WEBSERVER. You're connecting to the website using Internet Explorer Mobile Edition on a Windows SmartPhone device for which you cannot configure the web proxy. You want to capture the traffic from the phone and the server's response.
Start Fiddler on the WEBSERVER machine, running on the default port of 8888.
Click Tools | Fiddler Options, and ensure the "Allow remote clients to connect" checkbox is checked. Restart if needed.
Choose Rules | Customize Rules.
Inside the OnBeforeRequest handler, add a new line of code:
if (oSession.host.toLowerCase() == "webserver:8888") oSession.host = "webserver:80";
On the SmartPhone, navigate to http://webserver:8888
Requests from the SmartPhone will appear in Fiddler. The requests are forwarded from port 8888 to port 80 where the webserver is running. The responses are sent back through Fiddler to the SmartPhone, which has no idea that the content originally came from port 80.
I would install Microsoft Network Monitor, configure the tool so it would only see HTTP packets (filter the port) and start capturing packets.
You could download it here
Configure Fiddler as a 'reverse proxy' on Windows
(for Mac, see the link in Partizano's comment below)
I know there's already an answer suggesting this, however I want to provide the explanation and instructions for this that Telerik should have provided, and also cover some of the 'gotchas', so here goes:
What does it mean to configure Fiddler as a 'reverse proxy'?
By default, Fiddler only monitors outgoing requests from the machine on which you're running Fiddler
To monitor incoming requests, you need to configure Fiddler to work as a 'reverse proxy'
What this means is that you need to set Fiddler up as a 'proxy' that will intercept incoming http requests that are sent to a specific port (8888) on the machine where you want to listen to the incoming requests. Fiddler will then forward those requests to the web server on the same machine by sending them to the usual port for http requests (usually port 80 or 443 for https). It's actually very quick and easy to do!
The standard way to set this up with Fiddler is to get Fiddler to intercept all request sent to Port '8888' (since this won't normally be used by anything else, although you could just as easily use another port)
You then need to use the registry editor to get Fiddler to forward any http requests that Fiddler receives on port 8888, so that they're forwarded to the standard http port (port 80, port 443 for an https request, or another custom port that your web server is set to listen on)
NOTE: For this to work, any request you want to intercept must be sent to port 8888
You do this by appending :8888 to your hostname, for example like this for an MVC route:
http://myhostname:8888/controller/action
Walkthrough
Ensure Fiddler can accept remote http requests on port 8888:
Run Fiddler as administrator Go to Tools > Fiddler Options > Connections, and ensure that 'Allow remote computers to connect' is checked, and 'Fiddler listens on port' is set to 8888:
Configure Fiddler to forward requests received on port 8888 to port 80
Close Fiddler
Start REGEDIT
Create a new DWORD named ReverseProxyForPort inside HKEY_CURRENT_USER\SOFTWARE\Microsoft\Fiddler2.
Now set the DWORD value to the local port you'd like to re-route inbound traffic to (generally port 80 for a standard HTTP server)
To do this, right-click the DWORD you created and select 'Modify'. Ensure 'Base' is set to 'Decimal' and enter '80' (or another port) as the 'Value data':
Ensure that port 8888 is opened on the firewall
You must ensure that port 8888 is open to external requests (it won't be by default if your server is firewall-protected)
That's it! Fiddler should now be set up as a reverse proxy, to intercept all requests from port 8888 (so that you can view them in Fiddler), and it will then forward them to your web server to actually be handled.
Test a request
Restart Fiddler
To test that Fiddler is intercepting external requests, open a browser on the same machine where you've set up Fiddler as a reverse proxy. Navigate your browser to http://127.0.0.1:8888
This tests making a basic request to to port 8888
You should see the request intercepted by Fiddler
Now you can test a request from another machine, for example by making a request from a browser on another machine like this (where 'remoteHostname' is a hostname on the machine where you've set up Fiddler as a reverse proxy) :
http://remoteHostname:8888/controller/action
Alternatively, you can compose a request by using another instance of Fiddler on a remote machine, using a URL similar to the one above. This will allow you to make either a GET or a POST request.
IMPORTANT: Once you've finished viewing your request(s), go back to Tools > Fiddler Options > Connections and remove the 'Allow remote computers to connect' option, otherwise 3rd parties will be able to bounce traffic through your server
Guys found the perfect way to monitor ALL traffic that is flowing locally between requests from my machine to my machine:
Install Wireshark
When you need to capture traffic that is flowing from a localhost to a localhost then you will struggle to use wireshark as this only monitors incoming traffic on the network card. The way to do this is to add a route to windows that will force all traffic through a gateway and this be captured on the network interface.
To do this, add a route with <ip address> <gateway>:
cmd> route add 192.168.20.30 192.168.20.1
Then run a capture on wireshark (make sure you select the interface that has bytes flowing through it) Then filter.
The newly added routes will come up in black. (as they are local addresses)
Microsoft Message Analyzer is the successor of the Microsoft Network Monitor 3.4
If your http incoming traffic is going to your web server at 58000 port, start the Analyzer in Administrator mode and click new session:
use filter: tcp.Port = 58000 and HTTP
trace scenario: "Local Network Interfaces (Win 8 and earlier)" or "Local Network Interfaces (Win 8.1 and later)" depends on your OS
Parsing Level: Full
You might consider running Fiddler as a reverse proxy, you should be able to get clients to connect to Fiddler's address and then forward the requests from Fiddler to your application.
This will require either a bit of port manipulation or client config, depending on what's easier based on your requirements.
Details of how to do it are here: http://www.fiddler2.com/Fiddler/Help/ReverseProxy.asp
Use TcpView to see ports listening and connections. This will not give you the requests though.
In order to see requests, you need reverse of a proxy which I do not know of any such tools.
Use tracing to give you parts of the requests (first 1KB of the request).
Using Wireshark..
I have not tried this:
http://wiki.wireshark.org/CaptureSetup/Loopback
If that works, you could then filter for http/http contains GET/http contains POST traffic.
You might have to run two Wireshark instances, one capturing local, and one capturing remote. I'm not sure.
You can also try the HTTP Debugger, it has the built-in ability to display incoming HTTP requests and does not require any changes to the system configuration.
Im trying to stop using TcpTrace and start working with Fiddler.
But i just can't setup fiddler to just start listening specified port and redirect all requests to the specified WS with another port.
All i want is just redirect and monitor all traffic from localhost:4747 -> webservice-ip:10000
Is there any solution for my problem ?
Thanks in advance.
Set Fiddler to listen on port 4747, and then edit your CustomRules.js (menu->Rules->Customize Rules). Putting something like this into the OnBeforeRequest method should help:
if (oSession.host=="localhost:4747") {
oSession.host="external:1000";
}
if you want all traffic passing through Fiddler to go to the external host, you can simply use
oSession.host="external:1000";
(where external is the hostname of the external host)