Zoom-Bombing Prevention

Note: for best meeting security, regularly download the most recent version of the Zoom client. We recommend doing this monthly.

Preventing unwanted guests and bad behavior in Zoom meetings is a combination of configuring your settings and learning key crowd control techniques. We suggest you first go through your settings and make our recommended changes. Then, read about crowd control techniques and practice them. This article covers the following:

Recommended Settings

Crowd Control Techniques

Recommended Settings

There are settings in Zoom that can help you reduce the likelihood of a Zoom Bombing attack. Most settings can be adjusted at both the global and individual meeting-levels. Adjusting global settings will change the defaults for subsequently scheduled meetings, including those subsequently scheduled via the D2L-Zoom Meetings tool. Adjusting settings on an individual meeting basis is a good option to change meeting settings for previously scheduled meetings.

Limit Meetings to Authenticated Users

Limiting meetings so that only authenticated users with PDX accounts can join new meetings is currently the system default for newly scheduled meetings. We strongly recommend you set all of your meetings up so that participants have to be affiliated with PSU (have pdx.edu credentials) in order to join. The exception to this practice would be a meeting where non-PSU participants, such as guest faculty, will join. 

To update this setting for an individual meeting:

  1. Sign in to the Zoom web portal at pdx.zoom.us.
  2. Click on Meetings from the left navigation menu.
  3. Schedule a new Meeting or select an existing Meeting to edit
    • If editing, scroll to the bottom of the selected meeting page and click Edit this Meeting.
  4. Under Meeting or Webinar Options, click Only authenticated users can join.

    • To require participants to be PSU authenticated to join a meeting select the option for Signed in with a Portland State Account (Odin)
    • To let anyone with a Zoom account join a meeting: select: Signed in with a Zoom account

Note: You can also update this setting globally so it is the default for all subsequently scheduled meetings by logging into the Zoom Web Portal at pdx.zoom.us, and clicking Settings from the left navigation menu.

Put Participants in a Waiting Room

Waiting rooms are currently set as the system default for newly scheduled meetings This means that all meeting participants will be automatically placed in virtual waiting room, until you manually let them in to your meeting. You can admit participants individually or all at one time, once you have verified they are people you actually invited. See how to manage waiting rooms.

To enable Waiting Room for an individual meeting:

  1. Sign in to the Zoom web portal at pdx.zoom.us.
  2. In the navigation menu, click Account Management then Settings.
  3. On the Meeting tab, navigate to the Waiting Room option under In-Meeting (Advanced) and verify that the setting is enabled.
  4. If the setting is disabled, click the Status toggle to enable it. If a verification dialog displays, choose Turn On to verify the change.
  5. Select who you want to admit to the waiting room.
    • All participants
      • All participants joining your meeting will be admitted to the waiting room.
    • Guest participants only
      • Only participants who are non-PSU participants or are not logged into any Zoom account will be admitted to the waiting room. If not logged in, they will have an option to log in.
    • Optionally select the pencil icon to set a custom waiting room message.
    • Click Save if prompted.

NOTE: You can also enable/disable a waiting room for individual meetings when scheduling new or editing existing meetings.

Set Meeting Passwords

Note: This option is not as secure as using a Waiting Room, since students can share passwords with the public. Use this option only with highly trusted invitees.

Setting a meeting password will require participants to enter a six digit code upon entry to your meetings. This feature is available for meetings as well as Personal Meeting Rooms and can be used in combination with Waiting Rooms for added security Meeting Passwords. Meetings are assigned a random password. You can assign or update the password to one of your choosing.

Set Passwords on a Meeting by Meeting Basis:

  1. Sign in to the Zoom web portal at pdx.zoom.us.
  2. Click on Meetings from the left navigation menu.
  3. Schedule a new Meeting or select an existing Meeting to edit
    • If editing, scroll to the bottom of the selected meeting page and click Edit this Meeting.
  4. Under Meeting Options, enable the checkbox for require meeting password. Customize the password as needed.
  5. Click Save when done.

Note: You can also update this setting globally so it is the default for all subsequently scheduled meetings by logging into the Zoom Web Portal at pdx.zoom.us, and clicking Settings from the left navigation menu. You will have additional customization options at the global-settings level.

Require Advance Registration for Public Meetings

You can require participants to register for a meeting in order to attend. This is generally not advised for class meetings, but it is strongly recommended for public meetings or with meetings where the Zoom links are posted publicly.. This requires users to register to receive the meeting link/password (if required). The meeting host can customize the registration field and approve or deny guests. This option can only be managed through meeting-level settings not set globally. Advance registration requires 2 steps: first you must enable registration for the meeting, then you should customize your registration settings.

Enable Registration for your meetings:

  1. Sign in to the Zoom web portal at pdx.zoom.us.
  2. Click on Meetings from the left navigation menu.
  3. Schedule a new Meeting or select an existing Meeting to edit
    • If editing, scroll to the bottom of the selected meeting page and click Edit this Meeting.
  4. Select the option to require registration.
  5. Click Save when done.
  6. You will now have a registration URL that you can use to invite people to register for your meeting.

Adjust the Registration Settings:

After enabling registration, a new set of options will appear at the bottom of the meeting details page.

  1. Click Edit on any tab to view and edit options.
  2. See Zoom registration documentation for more information.

Crowd Control Techniques

There are a number of features within Zoom that you can use during a meeting to help manage your participants, and mitigate unwanted behaviors. 

Manage Your Waiting Room

You’ll need to have enabled a waiting room for your meeting ahead of time.

  1. Join your meeting as the host.
  2. Click Manage Participants from the Host Controls.

  3. Click Admit to allow the selected participant join the meeting.
  4. Click Admit All to allow all waiting participants to join the meeting.

 

Manage Participants

As the host, you have a number of crowd control tools accessible to you in the host control panel. We outline them below, and also recommend Zoom’s In Meeting Controls 101 Video.

Host Controls

    • You may need to move your mouse to the bottom of your screen to trigger host controls.
    • Host controls contains all settings needed to control your participants in meeting. This menu contains individual user settings and controls for the whole meeting.

Click Participants to open the participant window.

  • Mute a Participant
    • Hover to the right of a user’s name to find the mute/unmute options for audio and the stop video/ask to start video option.
  • Remove a participant
    • Temporarily remove a participant by selecting Put in Waiting Room in the drop down next to the participant’s name. This feature removes the guest back to the waiting room, and you can allow them back into the meeting as you choose.
    • Select Remove from the drown down next to the participant’s name to block the user from re-entering the meeting. This does not ban the user from your meetings permanently. Please make sure to report the guest.
  • Mute all Participants
    • At the bottom of the Manage Participants window, click the Mute All button. This will mute everyone in the meeting except the host.
    • Disallow participants from unmuting themselves:
      • Click More
      • Make sure Allow Participants to Unmute Themselves is deselected. When users need the host to unmute them, have them raise their hands or comment in chat.

Control Who Can Share Their Screen

We highly recommend that you control who shares their screen by setting it so that only you, the host, can share your screen. This is the default setting for all PDX users. When this setting is on, the host can grant participants permission to share their screen at their discretion. 

To allow participants to share their screen

  1. Click the caret to the right of the Share Screen button from the host controls.
  2. Select Advanced Sharing Options.
  3. Select the All Participants option under Who can share?
  4. Do not change the default (Only Host) option under Who Can Start Screen Sharing When Someone Else is Sharing. 
  5. Close the dialogue box.

Control Who Can Annotate the Shared Screen

Zoom has a feature that allows users to annotate on top of any shared source. If you have enabled annotation for your meeting(s), any participant will be able to annotate the shared screen by default.

To temporarily disable participant annotation in a meeting

  1. Start a screen share
  2. Click the kebab (…) on the right side of the host controls.
  3. Click the option to Disable Attendee Annotation to prevent participants from annotating the shared screen.
  4. If you need to allow shared annotation, it’s recommended to select the option to Show Names of Annotators to prevent anonymous annotation.

Lock your Meeting

When all of your participants have arrived in your meeting, you can “lock” the meeting so that no more participants can join or ask to join. When you lock the meeting, no new participants can join, even if they have the meeting ID and password.

    1. When ready to lock, click Participants in host controls.
    2. Click Lock Meeting

Adjust Chat Settings

If the chat feature is causing disruption, you can adjust it to allow participants to chat with the host only, all participants publicly, all participants publicly and privately, or no one.

  1. Click Chat in host controls to open the chat window.
  2. Click the kebab icon (…) in the corner of the chat window.
  3. Select the option you would prefer.

This article was last updated on Nov 19, 2020 @ 1:49 pm.

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