Hello, I can't capture http localhost traffic under Ubuntu: it does not display anything. It works with wlan0 but not with loopback 127.0.0.1. I probably missed something but can't figure out what. Could someone helps? Thanks PS: I can see the localhost http traffic under Chromium developer's tool network tab. asked 07 Jul '12, 05:35  Grangousier edited 08 Jul '12, 11:43  Guy Harris ♦♦ showing 5 of 7 show 2 more comments |
One Answer:
According to the information you provided so far, I believe your web server runs on a port that is not detected as HTTP by Wireshark. If so,
Regards answered 08 Jul '12, 02:53  Kurt Knochner ♦ Beautiful, I added the port 8888 and it works now. Thanks a lot Kurt. (08 Jul '12, 03:13) Grangousier @Grangousier: If this is the correct answer than please tick the check mark to indicate so. That's proper Q&A etiquette. (09 Jul '12, 09:03) Jaap ♦ |
So you're connecting from an HTTP client (such as a Web browser) on your machine to an HTTP server on your machine, and you're not seeing any traffic even though the HTTP client is fetching stuff from the server?
What version of the kernel is your Ubuntu machine running (
uname -r)?what does it display?
Yes I have a local jetty server that runs my application and I connect to it using chromium but no http traffic is displayed by wireshark, whereas several http requests and responses are exchanged between the client and the server.
My ubuntu kernel version is 2.6.38-15-generic-pae. It's an old version but I fought so much to get Ubuntu run on my sony vaio one year ago (lots of problems with graphic support) that I hesitate to upgrade it.
what is the ubuntu release (lsb_release -a)?
How did you access the local server? 127.0.0.1 or the interface IP?
Did you set a capture filter?
Do you see the traffic if you capture with tcpdump?
Kurt, When I said "it does not display anything" I actually meant it does not display any "http" traffic but "tcp" traffic is displayed with source and destination address being 127.0.0.1.
tcp traffic on which port?
what is the ubuntu release (lsb_release -a)? 11.04
Did you set a capture filter? No capture filter
Do you see the traffic if you capture with tcpdump? Yes. I also see the tcp traffic with wireshark.
How did you access the local server? 127.0.0.1 or the interface IP? I don't understand what you mean by "access with interface IP"! I access it using a web browser where I enter my url "http://127.0.0.1:8888/"