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In "Follow TCP Stream" for http what is the numeric identifier after the as shown below. The destination port I am using is 9999 not 96.

GET / HTTP/1.1
User-Agent: Mozilla/5.0 Windows; U; Windows NT 5.1; en-US; rv: Gecko/20070515 Firefox/
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection: close

asked 10 Feb '14, 12:47

r24481's gravatar image

accept rate: 0%

edited 11 Feb '14, 00:41

SYN-bit's gravatar image

SYN-bit ♦♦

In "Follow TCP Stream" for http what is the numeric identifier after the

That's the port you entered in the URL, like, at least it should be the port.

What is the port in the TCP header?


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answered 10 Feb '14, 13:21

Kurt%20Knochner's gravatar image

Kurt Knochner ♦
accept rate: 15%

The URL I am using is and the trace shows I am using destination port 9999. I only see 96 when looking at the stream and it appears to remain as 96 on subsequent captures.

(10 Feb '14, 13:25) r24481

Can you please post a sample capture file somewhere (Google drive, dropbox,

(10 Feb '14, 13:31) Kurt Knochner ♦

BTW: is that a request of a real browser (old Firefox) or another tool (script) that uses that User-Agent: header?

(11 Feb '14, 01:18) Kurt Knochner ♦

The browser will split into:

GET / HTTP/1.1

Where did you capture the traffic? On the client with the browser? At the server? Or somewhere in between?

Some devices might alter the headers on purpose, think of load-balancers, reverse-proxies, etc. Are there any such devices in your network between the client and the server? Move your capture point from client to server and see where the request has been altered (assuming it leaves the client with the header Host:, otherwise it is a problem om the client itself).

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answered 11 Feb '14, 01:47

SYN-bit's gravatar image

SYN-bit ♦♦
accept rate: 20%

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question asked: 10 Feb '14, 12:47

question was seen: 3,154 times

last updated: 11 Feb '14, 01:47

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