Detecting blocked connections
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Hello all. We developed an app that interacts with Facebook, by posting data to a specific account. This is done by establishing an HTTP request. In my server, this works perfectly. However, when I go to out customer's, it simply won't work. I know that this guys have very tight security measures. One of those consist on blocking anything to do with Facebook. Now, we requested that for that server and a specific account to be free of such policies. They did so, and when opening the IE, they can connect to Facebook's main page. However, our program still throws a 400 Bad Request. So I'm wondering if there is anything else blocking such connections. To that end, I downloaded Microsoft Network Monitor 3 and SysInternals TCPView. However, neither shred a light on the situation, other than showing which connections are made. Thus my question: is there any tool out there that can be used to trace an HTTP connection and then detect where it is being blocked either by a policy or by a firewall? Or a clue on to what could be happening? Thank you so much in advance! Best regards.
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Hello all. We developed an app that interacts with Facebook, by posting data to a specific account. This is done by establishing an HTTP request. In my server, this works perfectly. However, when I go to out customer's, it simply won't work. I know that this guys have very tight security measures. One of those consist on blocking anything to do with Facebook. Now, we requested that for that server and a specific account to be free of such policies. They did so, and when opening the IE, they can connect to Facebook's main page. However, our program still throws a 400 Bad Request. So I'm wondering if there is anything else blocking such connections. To that end, I downloaded Microsoft Network Monitor 3 and SysInternals TCPView. However, neither shred a light on the situation, other than showing which connections are made. Thus my question: is there any tool out there that can be used to trace an HTTP connection and then detect where it is being blocked either by a policy or by a firewall? Or a clue on to what could be happening? Thank you so much in advance! Best regards.
Wireshark[^] will show you what's happening "on the wire". If it's local policy, you won't see anything. If it's a firewall, you'll see the 400 coming back. A clue to where it came from would be in the response time - the faster the response, the closer the rejection. hth Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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Wireshark[^] will show you what's happening "on the wire". If it's local policy, you won't see anything. If it's a firewall, you'll see the 400 coming back. A clue to where it came from would be in the response time - the faster the response, the closer the rejection. hth Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
Thanks Peter! I'll give it a shot!