Cognos Web Authentification

[Anton_K]

Hello all!
I am preparing load testing scripts to execute against a portal that uses Cognos.
I have googled a lot, but with no result.
Does anyone  know Cognos  authentication process??

The portal I am going to test sends its first GET request to file mod2_cognos.dll and passes m_passportId param. I do not understand where this param comes from.

There is also m_redirect property that includes m_session GET param in its URL.
Where does this m_session come from I also do not understand.

Here is this first GET request to Cognos:
GET http://TESTED_HOST/cognos84/cgi-bin/mod2_cognos.dll?b_action=xts.run&m=portal/main.xts&m_passportID=101%3aa2893db2-af91-2bab-c8e0-245371a85cfb%3a3009846111&m_productLocale=en&m_contentLocale=en-us&m_redirect=http%3a%2f%2fTESTED_HOST%3a80%2fcognos84%2fcgi-bin%2fmod2_cognos.dll%3fb_action%3dcognosViewer%26ui.action%3drun%26ui.object%3dstoreID(%2522i8E843DF43CEA400698A17441BF062CE0%2522)%26ui.name%3dPrompt%2520Page%26run.outputFormat%3d%26run.prompt%3dtrue%26cv.header%3dfalse%26cv.toolbar%3dfalse%26ui.backURL%3djavascript%253awindow.close()%26m_session%3d_CPSID_D7776281CC61726DED078594A9475F3E