How to use tcpdump to be able to see http requests sent to the server?
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As you can see it displays part of the nagios URL there... what i'm trying to do is find out what POST/GET/URL nagios executes form the nagios web management when say clicking on the button in nagios that disables notifications for a specific host and service, etc. so unless there is another way to find this out, i'm trying to find the data i need by dumping the packet data. But not sure how i can get all the packet data i need from it. I can see small amount of the request but not all of it?
EDIT:- Well obviously i can see the PHP code page when clicking on the submit button is sending a POST, but i can't see all the entire request?
Last edited by helptonewbie; 01-09-2009 at 06:20 AM.
Well it says right there that it was a POST to that uri... isn't that *exactly* what you want? I think a -v should make it prettier, printing some level of formal decode compared to a dump. In general wireshark is a better option for elegantly pulling stuff like that apart.
I've managed to get more data using the '-s' of tcpdump to not truncate output to 62 bytes as default but to capture whole packet. But this still didn't really give me the exact POST request that was sent. Perhaps i can't do what i want with this method?
Because at the end of the day i want to be able to in a script, run something like:-
curl --connect-timeout 4 --basic -u USER:PASSWORD http://NAGIOS/URL -d 'POST DATA'
To be able to start and stop notifications or checks using the nagios web page but via a script.
Last edited by helptonewbie; 01-09-2009 at 06:40 AM.