VPN Error 691: How to Fix It and Why NvoVPN Works
Need a VPN that just works?from 5,4 ₽ a day · card or crypto · 14 servers online Download for WindowsVPN Error 691? Learn how to fix it and why NvoVPN is a reliable solution for bypassing blocks in 2026.
What is error 691 and why does it occur?
Error 691 occurs when a user tries to connect to a VPN but receives a notification about incorrect credentials. This can happen for several reasons related to incorrect input of the username or password, or connection settings. Understanding this error will help you troubleshoot the issue more effectively and connect to the VPN without unnecessary difficulties.
Causes of error 691
There are several main reasons why error 691 may occur. First, it may be related to incorrect input of the username or password. Even a small typo can prevent the system from identifying you.
Second, sometimes the problem may be caused by incorrect connection settings. For example, if you are using the wrong protocol or encryption parameters, this can also trigger the error.
Need a VPN that just works?
- Download the NvoVPN app
- Sign in with Google or email
- Tap “Connect” — you’re done
from 5,4 ₽ a day
card or crypto
14 servers online
Additionally, if your VPN client is outdated, it may lead to incompatibility with the server, resulting in error 691.
How error 691 affects VPN connection
Error 691 directly affects your ability to connect to the VPN. If you see this message, it means your connection will be blocked, and you will not be able to access resources protected by the VPN. This can be particularly problematic if you need to use the VPN for work or to access blocked websites.
It is important to resolve this error quickly to restore access to the resources you need. If the problem persists, consider other VPN services that may offer more reliable solutions.
How to fix error 691 when using a VPN?
Fixing error 691 is possible through several simple steps. Below are instructions to help you troubleshoot the issue and regain access to the VPN.
Check your credentials
The first step in resolving error 691 is to check your credentials. Make sure you are entering the correct username and password. If you have forgotten your password, use the password recovery feature to reset it.
It is also helpful to check if Caps Lock is on, as this can lead to incorrect data entry. Use copy and paste with caution, as this may add extra spaces.
Connection settings
After checking your credentials, ensure that your connection settings are correct. Verify that you are using the right protocol and encryption parameters. If you are unsure what settings are needed, refer to your VPN provider's documentation.
It is also advisable to restart your router and device to eliminate any potential temporary network issues. Sometimes network problems can cause error 691.
Software update
Make sure your VPN client is updated to the latest version. Developers often release updates that fix bugs and improve compatibility with servers. If your software is outdated, this may be the cause of the issue.
If updating does not resolve the problem, you may try reinstalling the VPN client. This can help eliminate any potential errors in the program's settings.
Why NvoVPN is the best solution for bypassing blocks?
NvoVPN offers reliable solutions for bypassing blocks thanks to its unique protocols. Unlike many other VPN services, NvoVPN uses obfuscated protocols that help hide your traffic and make it less detectable by blocks.
NvoVPN protocols: AmneziaWG and VLESS/Reality
The main protocol of NvoVPN is AmneziaWG, which is an obfuscated version of WireGuard. This protocol makes your traffic resemble regular internet traffic, making it harder to block. Additionally, NvoVPN uses VLESS/Reality with CDN masking, allowing it to bypass deep packet inspection (DPI) systems.
The combination of these technologies provides a high level of security and privacy, which is especially important for users operating in regions with strict internet controls.
Advantages of NvoVPN over competitors
NvoVPN stands out among other VPN services with its privacy policy and no-logs policy. This means your data is not stored, and you can be assured of your anonymity online.
Furthermore, NvoVPN offers a simple interface and automatic protocol switching, making it user-friendly. Unlike other services that may restrict access or slow down connections, NvoVPN ensures stable speeds and access to blocked resources.
Compatibility with various devices
NvoVPN is available for multiple platforms, including Windows, macOS, Android, iPhone, and iPad. Despite the lack of a separate app for Linux, users can connect via the AmneziaWG configuration file from their NvoVPN account.
This makes NvoVPN a versatile solution for users who want to bypass blocks on various devices. Additionally, support for routers and Smart TVs expands the possibilities of using the VPN, providing protection for the entire home internet.
Frequently asked questions about error 691 and NvoVPN
Additional tips for troubleshooting error 691
If you are still encountering error 691 despite checking your credentials and connection settings, there are several additional steps you can take to troubleshoot the issue.
Check your internet connection
Before attempting to connect to the VPN, ensure that you have a stable internet connection. Error 691 may occur if your device cannot reach the VPN server due to internet issues. Try opening several websites in your browser to check the speed and stability of the connection. If your internet connection is unstable, try restarting your modem or router.
Using another device
The issue may be related to a specific device. If possible, try connecting to the VPN from another device. This will help determine whether the occurrence of error 691 is related to your device settings or the VPN account. If another device connects without issues, you may need to reinstall the VPN client on the first device or change its settings.
Contacting technical support
If you have tried all the above steps but error 691 still persists, it is recommended to contact your VPN provider's technical support. They may offer solutions specific to your case and help you quickly resolve the issue. When contacting support, it is important to provide as much information about your situation as possible, including the steps you have already taken to troubleshoot the error.
How to choose a reliable VPN service?
When choosing a VPN service, it is important to consider several factors to ensure security and connection stability. Here are some things to pay attention to:
Privacy policy
Choose a VPN that has a clear privacy policy and does not keep logs. This is important for ensuring your anonymity online. NvoVPN, for example, adheres to a strict no-logs policy, which means that your data is not stored or shared with third parties.
Connection speed and stability
Internet connection speed is another important factor. Many users choose VPNs for streaming video or gaming, so it is important that the service provides high speed and stability. Protocols such as AmneziaWG, used by NvoVPN, ensure minimal latency and high connection speed.
Support for various devices
Make sure that the VPN you choose supports all the devices you plan to use. NvoVPN is compatible with Windows, macOS, Android, and iOS, making it a convenient choice for multi-device scenarios. It is also important to pay attention to the ability to install on routers and Smart TVs to protect your home network.
DPI issues and how to bypass them
In regions with strict internet control, providers may use deep packet inspection (DPI) technologies to block VPN services. This can create additional challenges when connecting to a VPN. Here are some ways to bypass these restrictions:
Using stealth mode
Stealth mode is a technology that masks your VPN traffic, making it look like regular internet traffic. NvoVPN offers such features through VLESS/REALITY protocols, which help avoid blocks and bypass DPI. This is especially useful for users in countries with strict internet restrictions.
Changing connection ports
Some VPN services allow changing the ports used for connection. Switching to ports that are typically not blocked (for example, 443, used for HTTPS) can help bypass blocks. Although NvoVPN does not support this feature directly, users may try alternative solutions if they encounter issues.
Myths about VPNs
There are many myths about VPNs that can mislead users. Let's look at a few of them:
VPNs are only for downloading content
Many believe that VPNs are only needed for downloading torrents or bypassing geographical restrictions. In reality, VPNs also provide security for your data, protecting it from hackers and spyware, especially when using public Wi-Fi networks.
VPNs slow down the internet
While some VPNs may slow down the connection, this is not always the case. A good VPN, such as NvoVPN, uses modern protocols that minimize latency and provide high speed. The quality of the connection depends on your internet provider and the load on the VPN servers.
All VPNs are the same
This is far from the truth. Different VPNs offer different levels of security, privacy, and speed. Therefore, it is important to choose a VPN that meets your needs. As mentioned, NvoVPN offers unique obfuscated protocols that set it apart from competitors.
Remember that choosing the right VPN can significantly enhance your internet experience by ensuring security and access to blocked resources. If you encounter error 691, follow the recommendations and try NvoVPN for a reliable and secure connection. Visit nvovpn.com to download and connect!
What does error 691 mean?
Error 691 indicates incorrect credentials for connecting to the VPN.
How to check the correctness of credentials?
Make sure you are entering the correct username and password, and also check the connection settings.
Why choose NvoVPN?
NvoVPN offers obfuscated protocols and a reliable connection to bypass blocks.
How to install NvoVPN on iPhone?
Install the app through the App Store and log in with your NvoVPN account.
Can I use NvoVPN on Linux?
On Linux, the AmneziaWG configuration file from your NvoVPN account is used.
If you encounter error 691 with the VPN, don't waste time. Try NvoVPN to quickly and effectively resolve your connection issue. Visit nvovpn.com to download and connect!
Who we are and how we verify
NvoVPN (nvovpn.com) is a paid VPN service using AmneziaWG and VLESS/REALITY protocols, with applications for Windows, macOS, Android, iPhone, and iPad; on Linux, connection is made using the AmneziaWG configuration file from the personal account.
Before publication, information about NvoVPN — prices, trial access, devices, payment — is verified against the service's data. Links to third-party services and devices lead to their official websites; their availability has been checked on the day of publication.
Date of verification:
Sources
- Xray (VLESS/XTLS-REALITY) — official website
- Apple — official website
Need a VPN that just works?
- Download the NvoVPN app
- Sign in with Google or email
- Tap “Connect” — you’re done
1-day trial — 29 ₽, no auto-renewal