Or
tcpdump -vvv -X -s 0 -i eth0 -n -w tcpdump.pcap tcp port 8080
If you want to dump into a file tcpdump.pcap to inspect it later with Wireshark.
tcpdump -vvv -X -s 0 -i eth0 tcp port 8080
Needs to be run as root. Replace port 8080 with what ever port you need. Option "-i eth0" is just in case you have more than one network interfaces. If you use it make sure to replace eth0 with correct value for your server.
On Mar 30, 2012 4:55 AM, "ron.vandenbranden@home" <ron.vandenbranden@xxxxxxxx> wrote:Hi,
Thanks for your detailed suggestions, Tom.
On 29/03/2012 18:22, Tom Evans wrote:
On Thu, Mar 29, 2012 at 5:06 PM, Ron Van den Branden
<ron.vandenbranden@xxxxxxxx> wrote:
Yet, when switching on ProxyPreserveHost, internal redirects via Tomcat^^^^ This should be "on" surely?
fail:
ProxyPreserveHost off
Ouch, my bad, sorry. Surely, 'on' is what I meant.
So, what URL does your backend server generate? Does the Location
header, as seen by Apache, contain "http://localhost:8082/" when
ProxyPreserveHost is on, or does it contain something else?
The best way to debug reverse proxying is to run tcpdump on the proxy
server. That way, you can see the request as the reverse proxy sees
it, the request as the backend sees it, the raw response generated by
the backend and the processed response returned by the proxy. Without
seeing those things, we're probably just guessing.
I've briefly checked: I can run tcpdump on the proxy server. Yet, I don't know it at all. Do you perhaps know the command to achieve the task you mention, so I can produce more useful reports? Un/fortunately, I'm leaving on holiday tomorrow; but maybe I still have some time to look into this tonight.
Kind regards,
Ron
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