Hello,
We have elogd running on a pc, say cmsdaqpreseries, that also runs an apache server and we've made sure that it's only accessible through the apache server, like so:
http://cmsdaqpreseries.cern.ch/elog/
This works fine.
We then tried to set up another apache server on another computer, say cmsdaq, and use that as a proxy server to access the apache server on cmsdaqpreseries and thus the elog (don't ask why...). Our sysadmin has set up kerberos authentication on that machine, so if I go to:
https://cmsdaq.cern.ch/elog/ (note the 's')
I am prompted for a username and password and then get the elog selection page. All seems to be working well, for example, the URL:
https://cmsdaq.cern.ch/elog/DAQ/?cmd=Find
will load properly. However, if I hit "login" (https://cmsdaq.cern.ch/elog/DAQ/?cmd=Login) I get caught in an infinite redirection. Of course:
http://cmsdaqpreseries.cern.ch/elog/DAQ/?cmd=Find
will still work! Any ideas on what we should do to set it up correctly? And why does this only happen with the login command?
Our sysadmin used ethereal to sniff the message exchange between the apache on cmsdaqpreseries and elog. I am including the details of the http request that elog likes (directly from cmsdaqpreseries) and of the one it doesn't like (from cmsdaqpreseries but originating at cmsdaq) as image attachments, as the text is not selectable (sorry). 
Thanks in advance,
Dimitris |