TYPO3 Core

Can you please test if the issue goes away when setting [FE][lifetime] = 0 ?
(this will make the cookie a session cookie)

Unfortunately this doesn't work. I also tried to set [FE][permalogin] = 1, but this also didn't help.

This is really hard to track for me then.
Do you have a chance to debug that instance?

Still couldn't find where it goes wrong.
Login works but after that de cookie gets deleted bij renewing a page.

In the mean time the TYPO3 version is updated to 6.2.9

We got now got issue #65223. Could it be that you suffer from the same problem? (Login-mode set on the page)

I have a similar problem with my Typo3 6.2.11 website:
Sometimes when users login with fe_login and contribute something to the forum or their profile they are for some unknown reason automatically logged out.
First it seemed to me that only apple users face the problem, however I had to realize that also windows users face the problem. It seems to work a bit better with Firefox than with other browsers, but not always.

My configuration:

TYPO3 6.2.11
PHP 5.4.38
MySQL 5.5.42

[FE][checkFeUserPid] = 1
[FE][lockIP] = 2
[FE][loginSecurityLevel] = normal
[FE][lifetime] = 0
[FE][sessionDataLifetime] = 86400
[FE][permalogin] = 0

I have now for testing set [FE][lifetime] to "86400" instead of "0". Hopefully this will help.
Thank you very much for any help.

Can you reproduce the problem on your machine or does this only happen sporadically?

Unfortunately the problem only happens sporadically.

I have just got this error report again by a user:
"1. Schreibe Antwort im Forum
2. klicke auf Senden
3. Werde ausgeloggt mit Fehlermeldung: Keine Berechtigung
4. Logge mich erneut ein
5. kopiere Antwort aus Zwischenspeicher (bin ja jetzt schlauer icon_wink.gif)
6. klicke auf Senden -> funktioniert
7. gehe zu einer anderen Diskussion
8. Schreibe Antwort
9. klicke auf Senden
10. fliege wieder raus"
The user uses a Mac with Safari or Chrome.

I use Windows 7 with latest Firefox and I have never been outlogged at all after a few hundreds of logins and postings on the website. However there is another report by a windows 8.1 user with Chrome with the same problems.

Thank you very much for your help.