With the use of Wintun upload speed is about 30 Mbit maximum on any VPN server

[shamarin]

Please answer the following questions for yourself before submitting an issue.

• [X] I checked the knowledge base and found no answer
• [X] I checked to make sure that this issue has not already been filed

AdGuard VPN version

2.4 nightly 10

Environment

- OS:Windows 11 x64 22635.4010
- Other network-level software: no

Which DNS server do you use?

Default

Custom DNS

No response

Use Wintun

• [X] yes, I do

Issue Details

Steps to reproduce:

1. Enable the use of Wintun in Adguard settings
2. Start to upload any big file (i use Total Commander with Webdav plugin)
3. Watch the speed via Windows task manager

Expected Behavior

Upload speed should be just about 100 Mbits as for my provider and as for without the use of the Wintun

Actual Behavior

Upload speed is about 30 Mbits maximum on any VPN server

Screenshots

Screenshot 1

Additional Information

No response

[shamarin]

If to enable QUIC protocol in settings then upload speed is high (about 86-90 Mbits as should be), but download speed became to slow (10-20 Mbits). Seams that something wrong. This is Yandex speedtester (yandex.ru/internet). But in real apps just the same.

[shamarin]

Tested on the same internet provider and on the same VPN servers. On Android with Adguard VPN speed is normal in both directions, but only with Windows app upload speed is 30 Mbits maximum.

[AlexandrPkhm]

Hi @shamarin

We are unable to reproduce the issue. To diagnose and troubleshoot this issue, we need to get the app logs. Here's what we need you to do:

1. Go to Settings → App settings → Logging level → Record everything;
2. Reproduce the problem and remember the exact time it was reproduced at. We will need it to find the corresponding entries in the log file;
3. Open Support tab → Export logs and system info;
4. Send the archive to devteam@adguard.com and mention this issue number in the subject. Don't forget to include the time of reproduction.
5. Set the logging level back to Record by default.

[shamarin]

Hi @shamarin

We are unable to reproduce the issue. To diagnose and troubleshoot this issue, we need to get the app logs. Here's what we need you to do:

1. Go to Settings → App settings → Logging level → **Record everything**;

2. Reproduce the problem and remember the exact time it was reproduced at. We will
   need it to find the corresponding entries in the log file;

3. Open Support tab → **Export logs and system info**;

4. Send the archive to `devteam@adguard.com` and mention this issue number in the subject. Don't forget to include the time of reproduction.

5. Set the logging level back to **Record by default**.

Ok, will send it today.

[shamarin]

The problem exist only with HTTP/2, with QUIC it's fast.

[shamarin]

Hi @shamarin

We are unable to reproduce the issue. To diagnose and troubleshoot this issue, we need to get the app logs. Here's what we need you to do:

1. Go to Settings → App settings → Logging level → **Record everything**;

2. Reproduce the problem and remember the exact time it was reproduced at. We will
   need it to find the corresponding entries in the log file;

3. Open Support tab → **Export logs and system info**;

4. Send the archive to `devteam@adguard.com` and mention this issue number in the subject. Don't forget to include the time of reproduction.

5. Set the logging level back to **Record by default**.

Reproduced and sended logs. It only happens without using of QUIC protocol. Reproduced at 19:04-19:05 Moscow time.

[shamarin]

With the latest nightly build 2.4.1 nightly 1 upload speed is about 90 Mbits, but download speed became worse (30-40 Mbits). QUIC and Wintun are enabled. yandex.ru/internet showing near the same results.

[shamarin]

Tested on Denmark location (the real ping is 93 ms but app showing that it is 53 ms)

[shamarin]

Without QUIC protocol enabled

[shamarin]

It happens if Total Commander is in exclusions list and if not then upload speed is fast.