Putty сетевая ошибка время ожидания соединения истекло

Тогда как новички используют для управления компьютером по сети удобные и простые программы вроде TeamViewer, опытные юзеры и администраторы сетей нередко предпочитают более сложное в использовании специализированное программное обеспечение. Например, PuTTY. Эта бесплатная программа служит для безопасного подключения и отправки команд на сетевой компьютер по протоколам SSH, Telnet и Rlogin.

А также приложение может использоваться для настройки устройств с помощью COM-портов.

Программа PuTTY отличается высокой надежностью и стабильностью, но и она не застрахована от время от времени случающихся ошибок, среди которых наиболее часто встречающейся остается «Ошибка сети. Время ожидания подключения истекло».

Если судить по описанию, ошибка возникает, когда в течении определенного времени клиент не получает ответа от сервера, то есть PuTTY не удается установить SSH-соединение с удаленным устройством. В свою очередь, это может быть вызвано разными причинами.

Проверьте доступность сетевого устройства

Первое, что нужно сделать при появлении ошибки «Время ожидания подключения истекло», это проверить наличие соединения между устройствами.

Выполните в командной строке команду ping IP, заменив IP айпи-адресом сетевого устройства. Если пинг не проходит, имеет место либо кабельная проблема, либо соединение блокируется фаерволом, либо вы указали неверные данные для подключения в клиенте PuTTY.

Отключите брандмауэр

По умолчанию штатный брандмауэр блокирует большую часть портов, поэтому нельзя исключать, что соединение не проходит как раз по причине блокировки используемых соединением портов на компьютере-сервере.

Отключите на удаленном компьютере фаервол и пропингуйте ПК повторно. Если пинг проходит, но попытка подключиться по SSH по-прежнему завершается ошибкой, проверьте настройки SSH на серверном компьютере.

Включите SSH

Прежде чем использовать PuTTY, на удаленном компьютере необходимо включить протокол SSH и запустить связанную с ним службу.

1. Откройте приложение «Параметры» и перейдите в раздел «Приложения» -> «Дополнительные компоненты»;

1. Поищите в списке установленных компонентов «Сервер OpenSSH», если таковой отсутствует, нажмите «Добавить компонент»,

1. выберите в списке «Сервер OpenSSH», отметьте его флажком и нажмите «Установить»;

1. После того как модуль будет установлен, откройте оснастку управления службами командой services.msc;
2. Отыщите службу «OpenSSH SSH Server», откройте ее свойства и, выставив тип запуска «Автоматически», запустите.

Сохраните настройки, перезагрузите компьютер и попробуйте подключиться к нему с помощью клиента PuTTY.

Если ошибка не исчезнет и после этого, стоит покопаться в сетевых настройках самого PuTTY, а заодно проверить, не занят ли на удаленном компьютере используемый приложением по умолчанию порт 22. Ну и не забывайте о существовании таких неплохих альтернатив PuTTY как OpenSSH, ZOC или Xshell.

PuTTY is a free-to-use software used to connect to remote computers over a secure connection. It can be used to create a Secure Shell (SSH) between 2 devices, open a Terminal Over A Network (telnet) connection, and offer a few other options as well. However, it can throw a few errors from time to time.

Today we are going to address a common fatal error that many users have experienced using the PuTTY software, which goes as follows:

Network Error: Connection Timed Out

A fatal error means the software throws an error without an intimation or warning without saving its state, and the user cannot perform any further actions.

An SSH connection can be established between a host (local) computer and a server (remote) device. This allows users to gain control of the remote device through a Command Line Interface (CLI) – which is very much similar to Remote Desktop Connection (RDC). The only difference is that the RDC has a Graphical User Interface (GUI).

Although SSH is mostly used to connect to devices having a CLI-based operating system (like Linux distros), it can also be used to connect to Windows computers as well.

A Windows 11/10 computer has a built-in SSH client and a server – meaning it can be used to connect to a remote PC using SSH, and it can be connected to as well. However, setting up the SSH server on a Windows computer needs some configuration, which we have discussed further down this post.

If you are an IT professional, then you must have used the PuTTY software at least once in your lifetime. Which is why you must understand that sometimes PuTTY displays this error message even when you have entered the correct information in it (which includes the IP address, the protocol, and the port number to be used).

Why “Connection Timed Out” Error Occurs

When the SSH protocol is establishing the connection between the 2 devices, the client sends out a message to the server, to which the server responds. However, if the client does not receive a reply after multiple attempts, the client prompts an error message stating “Connection timed out.”

Therefore, it can be concluded that PuTTY has been unsuccessful in establishing an SSH connection with the remote device. This can be due to several different reasons:

• The remote server’s IP address is inaccessible.
• The remote server’s firewall is blocking the respective SSH port.
• SSH and dependent services are disabled.
• Antivirus is blocking SSH traffic.

Let us now show you how to fix the problem so you can successfully connect to the remote device using the SSH protocol in PuTTY.

Fix PuTTY “Network Error: Connection Timed Out”

Confirm IP Access

To start with, confirm that the remote server is accessible from the client machine. This is most conveniently done by performing a ping test. Pinging the server from the client will ensure that the network connection between the 2 devices is valid.

Enter the following cmdlet in the Command Prompt while replacing IPAddress with the IP address of the remote PC you want to SSH.

ping IPAddress

If you find that the ping did not return a reply, this means that either the machine is not on the same network as yours, or the server’s firewall is up, which is blocking both the ping and the SSH connection.

Disable Windows Firewall

Windows firewall blocks most ports by default. Log into your server using the portal (or physically accessing the machine) and disable its firewall by performing these steps:

1. Open Windows Firewall by typing in firewall.cpl in the Run Command box.

   

2. Now click Turn Windows Defender Firewall on or off from the left.

   

3. Now select Turn off Windows Defender Firewall under every network profile visible. Once done, click OK to save the changes.

   

Now recheck if you can ping from the client machine. If yes, then retry the SSH connection and see if it works. If it still doesn’t, continue to perform the following solutions to mitigate the problem.

Check if SSH is Enabled

As we mentioned at the beginning of this post, an SSH server needs to be configured on a Windows PC before you can connect to it. Perform the following steps on the server to enable SSH:

1. Navigate to the following:

   Settings app >> Apps >> Optional features

2. Here, click View features in front of “Add an optional feature.”

   

3. In the “Add an optional feature” window, search for “Open.” From the search results, select OpenSSH Server, and then click Next.

   

4. In the next window, click Install.

   

5. The feature will then be installed. When it does, you must manually enable the dependent services. Open the Services console by typing in services.msc in the Run Command box.

   

6. Here, right-click OpenSSH SSH Server and click Properties from the context menu.

   

7. In the Properties window, select “Startup type” as Automatic, then click Start to start the service. When it does, click Apply and Ok to save the changes.

   

Now that SSH is configured, you should be able to connect to this machine from the client PC using PuTTY.

If you still experience the same error, there are still a few more things you can do.

Disable Antivirus

The built-in Windows Defender Antivirus in Windows 11 and 10, or any other third-party antivirus, can cause hindrance in an SSH connection. Try disabling them and checking if it resolves the issue.

Learn how to disable Windows Defender temporarily. If you are using a third-party antivirus, you must disable it also.

Once disabled, check if you can successfully connect to the SSH server using PuTTY.

Conclusion

The “Network Error: Connection Timed Out” error in PuTTY occurs even before a user is asked to enter the credentials. Therefore, the error cannot be blamed on incorrect user account information. Thus, it is only possible that there is an issue with the connection itself.

If you are still unable to resolve the issue after performing all of the solutions above, then as a last resort, you can try rebooting the server as well as the client. This has often solved problems for many users, especially when certain responsible services are not behaving as they should. A system reboot usually fixes these things.

If this doesn’t work either, then it is likely that the default SSH port has been moved by someone. You can check the listening ports of a machine and find out which port is designated for SSH.

PuTTY connects to SecureShell.

Yes, it is probably the router/Internet connection.

It is rare, but some high-class routers have the ability to drop outgoing connections.

I’m not familiar with Verizon, but it is possible they have some kind of proxy through which you connect to the Internet and this proxy doesn’t allow outgoing connection.

I had similar problem at work. The work proxy was blocking port 22 (standard port for SSH). I changed it to 443 which is the HTTPS port, and it allowed me to connect to my server. To do this change, you have to modify /etc/ssh/sshd_config and change default port from 22 to 443 and then connect through that. But this requires you to connect to a server in the first place which is impossible as I see it. Or you could very quickly run to the nearest library, modify the SSH configuration file to listen to the HTTPS port instead of the standard port 22 and run back home.

But I think your best bet is to call Verizon customer support and ask them about it.

Question

Issue: How to fix PuTTy Fatal Error: Network Connection timed out?

Hello. I tried to use PuTTy to access a remote server but I received a Fatal Error: Network Connection timed out. I have never encountered issues like this before. How do I fix it?

Solved Answer

PuTTy is a free and open-source terminal emulator program that allows users to connect to remote computers through various protocols such as SSH, Telnet, and SCP. It is commonly used by system administrators and developers to remotely access and manage servers, network devices, and other types of computer systems.

The “Fatal Error: Network connection timed out” is an error message that can occur when using PuTTy to connect to a remote server. This error message indicates that PuTTy was unable to establish a connection with the remote server within the specified time limit. This can happen due to various reasons such as a firewall block, incorrect server configuration, or network connectivity issues.

This error can affect users in different ways, depending on what they are trying to do. For example, if a system administrator is trying to remotely access and manage a server, this error can prevent them from being able to perform important tasks. Similarly, if a developer is trying to remotely access a server to test and deploy code, this error can impede their ability to complete their work.

Possible solutions for this issue can include checking the firewall settings, checking the server’s configuration, and troubleshooting the network connectivity. Additionally, users can also check their local network, such as their router or modem, to ensure that there are no issues there. In some cases, it may be necessary to contact the server administrator or hosting provider for further assistance.

In this guide, you will find 6 steps that should help you fix PuTTy Fatal Error: Network Connection timed out. It is also possible that the error in PuTTy can be caused by underlying issues with the Windows operating system, such as corrupted files.

They can cause various issues with network connections, including preventing PuTTy from being able to establish a connection with the remote server. If you want to check for this, you can use a maintenance tool like FortectMac Washing Machine X9 that can fix most system errors, BSODs,^[1] registry^[2] issues, or clear cookies and cache.^[3] Otherwise, follow the step-by-step instructions below.

Method 1. Contact the Network Administrator

It is recommended to reach out to your system administrator before attempting to troubleshoot any issues with your router, as they may have recently made changes to permissions for security reasons. This can be easily resolved by contacting the system administrator.

Method 2. Make sure SSH Connection is Enabled

The “Network Connection timed out” error may occur if the device you’re trying to connect to has SSH disabled. To resolve this issue, ensure that SSH is enabled on the device’s settings. For example, on a Raspberry Pi, you can enable SSH by going to Configuration > Interfaces > ssh. The process may vary depending on the device you’re using, but the goal is to enable SSH and establish a working network connection through PuTTy.

Method 3. Disable Windows Defender Firewall

• Click on Start and select Settings
• Open Update and Security
• Open Windows Security
• Open Firewall and network protection
• Select the preferred network type (Public, Private, or Domain Network)
• Disable Windows Defender Firewall

Note: You may need to disable the firewall from a third-party anti-virus program if it is running on your computer. This can be done by accessing the program’s settings or preferences and looking for the option to turn off the firewall.

Method 4. Check Domain Records

When working with a new server and a fresh domain, the “network error: connection refused” error can occur due to an incorrect DNS server address in the domain settings. Most domain registrars allow you to point your domain to a third-party hosting provider using the name server. If you have only installed a server and did not change the name server, you may experience this error.

To resolve this, log in to your domain name provider and check the name server settings to ensure they are pointing to your hosting provider.

Method 5. Check for Blacklisted and Whitelisted IP Addresses

The “network error: connection refused” error may occur if the system administrator has restricted connections to only computers with known IP addresses that are whitelisted in the configuration file. If your IP address has changed or you are new to the job, you may need to ask the network administrator to make an exception.

Additionally, this issue may occur if your IP address has been accidentally blacklisted by the network administrator. Therefore, it is important to check with your network administrator to see if this is the cause of the problem and if an exception can be made.

Method 6. Try other Solutions

1. Restart the SSH server or reboot the servers
2. Contact the person who set up the server to inquire about any changes made to the default port
3. If you are using a fully managed server, contact the hosting provider’s support team
4. Consider using alternative SH terminals instead of PuTTY.

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