AdGuard Conflict with VPN: IVPN, Mullvad, OVPN

[TESTER-sec]

Please answer the following questions for yourself before submitting an issue

• Filters were updated before reproducing an issue
• I checked the knowledge base and found no answer
• I checked to make sure that this issue has not already been filed

AdGuard version

7.19.0 (4853) (CL 1.16.44, DL 2.5.41)

Browser version

Microsoft Edge

OS version

Windows 11 Pro Version 23H2 OS build 22631.4460 Experience Windows Feature Experience Pack 1000.22700.1047.0

Traffic filtering

• yes, I do

Ad Blocking

AdGuard Base filter

Privacy

AdGuard Tracking Protection filter, AdGuard URL Tracking filter

Social

AdGuard Social Media filter

Annoyances

AdGuard Annoyances filter, AdGuard Cookie Notices filter, AdGuard Popups filter, AdGuard Mobile App Banners filter, AdGuard Other Annoyances filter, AdGuard Widgets filter

Security

No response

Other

No response

Language-specific

No response

Which DNS server do you use?

Cloudflare DNS

DNS protocol

Regular

Custom DNS

No response

What Stealth Mode options do you have enabled?

No response

Support ticket ID

No response

Issue Details

Steps to reproduce:

1. Install Windows 11 23H2
2. Install AdGuard and enabled DNS Protection with ANY configuration
3. Install VPN: IVPN or Mullvad or OVPN (which all use their own DNS and DNS filtering)
4. Immediately problems begin accessing MSN, Bing search, Hotmail, Outlook, OneDrive, etc via the Microsoft Edge Brower or Windows Apps such as Weather

This issue can reproduced at-will every single time.

Expected Behavior

AdGuard will not conflict with VPN and cause issues accessing vital Microsoft web resources.

Actual Behavior

AdGuard creates a conflict with VPN and essentially blocks access to vital Microsoft web resources.

This issue began immediately after the last Windows 11 23H2 update in November, 2024.

Screenshots

No response

Additional Information

This has been reported to the VPN (IVPN, Mullvad, OVPN) and, of course, everyone is pointing fingers at each other. "Not our problem. Uninstall AdGuard."

[KolbasovAnton]

@TESTER-sec Hello!
In order to troubleshoot this issue, we need to get your application logs.

Here's what we need you to do:

1. Collect the debug log as it's explained here.
2. Remember the exact time when the issue was reproduced.
3. Send the archive to [email protected]:
   - include [windows] keyword and ISSUE_NUMBER in the subject of your email
   - specify the exact time when the issue occurred

[KolbasovAnton]

@TESTER-sec Also, a couple of questions:

• The problem still reproduce with the latest nightly version of AdGuard?
• Will the problem reproduce if You completely switch off AG (Exit AdGuard from the tray menu)?
• Will the problem reproduce if You set default settings in AG (General settings -> Reset settings to default)?