Block concurrent sessions quiz access rule

Is there plans to support Moodle 5.2 or superior?

Ramon Ovelar.
This plugin checks not only ip, but client's session and useragent. If user closed and reopened browser, he will be blocked too. But teacher can allways unlock students attempt.
Plugin allways log any attempt to use test from other session (but maybe same ip), if you do not see this event, there's some problem with your system. Plugin settings should apply immediately, without any errors.
If you can meke reproducable scenario, plesase make issue on github

In a quiz with more than 300 concurrent students in 3 different sites and wifi connection, the attempt of one student was blocked two minutes after the beginning. A few minutes later (8 and 11 minutes since the beginning) other 2 students were blocked. We are looking at the logs of Moodle and we don't see any other device trying to enter the quiz with the same user. The IPs remain the same before and atfer these students being blocked. What else could explain this blockage?
We decided to remove quickaccess onesession rule, unmarking the box in the settings, and we had a general error stating the id of the quiz was not valid during almost 5 minutes, and afterwards everything resumed ok. We are now studying every available log trying to understand what happenned.

Is it possible to use this plugin with a tablet which runs Android version of the mobile application. Thanks. Much appreciated.

Mohammad Hussein, this is expected behaviour, it locks quiz on any session change (browser restart, computer changed even to same ip). If you need only disable access from other IP, you should use ip address rule or quizaccess_ipaddresslist plugin

Hi Vadim
Thanks for the plugin, it's helped us a lot. We are using it on Moodle 4.1 hosted on the cloud, it works fine with us except for one issue we are facing, all of our labs are connected to one vLan IP 185.64.200.82 (local IP) but whenever the computer is restarted or we change the student PC the quiz is locked and we have to reset the attempt.
We are sure all PC have the same IP, do you think it's because we hosted Moodle on the cloud?
Any idea?

mik dodge, you should check moodle logs, to check if something changes. Plugin relies on ip address, moodle session and useragent headers. You should check, that you do not change ip (if using mobile network or wifi), do not relogin to moodle and you browser do not randomly change useragent (there're some browser extentions that can do so). Logs will show you ip changes and login events

why i'm keep getting this error message:
You are trying to access quiz attempt from a computer, device or browser other than the one you used to start the quiz. If you have accidentally closed your browser, please, contact the teacher.
while i'm testing to access the quiz from another device, the system blocks the second device and after time it blocks the first device that accessed the quiz first..!
at the end, i get this error on both machines..!!

Cristina Martín, plugin was upgraded to support recent versions.
Gebze Moodle, this plugin can be extended or used with lesson because moodle do not provede security plugin features fom mod_lesson.
Linda Raymond-Hagen, Respondus provide complex solutions to prevent quiz cheating. If their solution are vunerable to parallel seessions, they should improve their solution. Long explanation in https://github.com/vadimonus/moodle-quizaccess_onesession/pull/11

Hi, Can this plugin be adapted to work with Respondus LockDown Browser?

Hi Vadim Dvorovenko, that is great plugin. Is it possible to apply this plugin for lesson videos? To prevent students open multi training videos at the same time.

Hi Vadim, a version of this plugin for Moodle4 is planned?
Thanks for the plugin.

Davide Ferro, plugin uses moodle function getremoteaddr() to determine IPs (it supports ipv6), and HTTP_USER_AGENT header to check browser version.
Check logs for this user to check to see if his IP is changing during test. Maybe this user is using some anti-tracking software or proxy that changes user_agent. Any type quiz access is blocked with this plugin, it's logged, so you can see, if access is blocked with this plugin

Hi Vadim, thanks for the plugin! We are experiencing some issues with users accessing the quiz with IPv6 addresses. Do you think it could be caused by the plugin not dealing with IPv6 addresses?

Azmat Ullah, yes, this plugin is for quiz sessions on computers, contorolled by your organization, to be sure that no one can cheat using other device out of you contol. Mobile devices are not such devices