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.vandenbran...@kantl.be> 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.vandenbran...@kantl.be> wrote: >> >>> Yet, when switching on ProxyPreserveHost, internal redirects via Tomcat >>> fail: >>> >>> ProxyPreserveHost off >>> >> ^^^^ This should be "on" surely? >> > > 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 > > ------------------------------**------------------------------**--------- > To unsubscribe, e-mail: > users-unsubscribe@httpd.**apache.org<users-unsubscr...@httpd.apache.org> > For additional commands, e-mail: users-h...@httpd.apache.org > >
