Proxy auth error

Errors are one of the most frustrating aspects of running a WordPress site. Some problems like HTTP Error 407 can make your content inaccessible, leading to a drop in sales or conversions.

Luckily, there are some easy steps you can take to resolve this issue, plus tools to help you debug your site. By identifying the root cause of the problem, you can implement the right fix and hopefully prevent it from happening again in the future.

In this article, we’ll take a closer look at the HTTP 407 error and its causes. Then, we’ll show you how to fix it on the client side and server side. Let’s get started!

Check Out Our Video Guide To Fixing HTTP Error 407 “Proxy Authentication Required”

What Does “407 Proxy Authentication Required” Mean?

The “407 Proxy Authentication Required” error occurs when the server is unable to complete a request. This happens due to a lack of authentication credentials when a proxy server is used between the client and server. Essentially, the proxy is unable to authenticate the client.

Since there are multiple parties involved, it can be tricky to identify the exact cause of the problem. It may even be caused by the proxy itself, meaning there is no fix on your end.

However, there are some things that you can do to try to resolve the communication with the proxy.

Note that this problem may also be related to the generic 400 Bad Request error.

Inaccessible content can mean a drop in sales or conversions… but luckily, there are some easy steps you can take to resolve this frustrating error 💪Click to Tweet

What Causes the HTTP Error 407?

HTTP errors happen when a client requests to connect to a server and fails. Anytime a web browser attempts to access an online server through the HTTP protocol, there is a conversation between the client and server. HTTP codes are used to handle that conversation, sending success and failure messages back and forth.

HTTP error 407 is similar to error 401, which occurs due to unauthorized access. The only difference is that error 407 fails authentication with a proxy rather than a direct server connection.

Client authentication is part of the process of establishing a secure connection. One component of this communication is the exchange of a digital certificate. This certificate may be tied to the digital ID of a person, company, program, or individual machine. Servers can approve or deny requests based on the data within a digital certificate and grant or withhold access to connect.

In many cases, a simple connection delay, typo, or code contradiction can lead to a digital ID being misunderstood and rejected. Alternatively, you might not have access to the server.

How To Fix the “407 Proxy Authentication Required” Error

Since there are three different parties involved, you may need to try a few different solutions to resolve HTTP error 407. You may have access to the client and server, but the proxy is likely out of your control.

Hopefully, you’re using an Application Performance Monitoring (APM) software that caught the error before it became a larger problem. There are several powerful APM tools that can help you identify and resolve errors on your site, including our Kinsta APM tool. You can access this from the MyKinsta dashboard.

Now, let’s look at how to identify the cause of HTTP error 407 and resolve the issue. As always, it’s a good idea to perform a backup before making changes to your site.

Fixing a Client-Side Issue

Checking for client-side issues is probably the quickest and easiest place to start. To rule out any oddities, you can try to connect from a different browser or device. For instance, if you get a 407 error on your computer but not your phone, there may be an issue with the device’s digital ID or security program.

If you’ve made changes to your site recently, you may want to undo them and test the connection again. Otherwise, if you have reason to believe it could be a client-side issue, you can try the following steps.

Step 1: Check the URL

First, you’ll want to make sure that you’re entering the correct URL. This may sound silly, but a minor typo can lead to the HTTP 407 error. Therefore, you’ll want to double-check the URL, clear your cache, and try revisiting the website.

Better yet, try using a search engine to pull up the page you’re looking for, rather than typing in the URL directly. If you’re still receiving an authentication error, there is likely an issue on the back end.

Step 2: Deactivate Your Plugins

If you’ve recently made any changes that seem to coincide with the error, that is a good lead to pursue. If the error is happening on your own website, you might want to take a look at any recent plugins, themes, or extensions you have added or updated.

If you’re still able to access your dashboard, go to the Plugins page and deactivate all of your plugins:

Then, try to connect to the site again to see if the error persists. If not, you may have found the source of the problem.

Now, reactive your plugins one at a time and keep refreshing the page. If HTTP error 407 only occurs when a certain plugin is active, there may be some issue with the coding that is preventing you from accessing the proxy server.

If you’re unable to access the WordPress dashboard, you’ll need to connect to your site via a File Transfer Protocol (FTP) client like FileZilla. Once you enter your credentials and connect to your site, navigate to public_html > wp-content and locate the plugins folder.

Then, right-click on the folder and select Rename:

By renaming this folder, you’ll automatically deactivate all plugins on your site. Now, check to see if the error has disappeared. If it has, you can rename the folder back to plugins and log into your WordPress dashboard to reactive your plugins one by one until you find the culprit.

You might want to check to see if there is an update available for the glitchy plugin, as this may resolve the issue. If not, consider reaching out to the developer to see if they’re aware of the problem and if they’re working on a solution.

Step 3: Review and Roll Back Recent Changes

If you can’t find any issues on the client-side that could be causing the problem, the last thing you can do before moving on is to run a restoration. If you can revert the site to a previous instance before the error cropped up, this will determine if the problem was caused by a recent change or an external source.

If possible, run a backup before rolling back so you can return to the current version if the error persists. Otherwise, you may revert back and still encounter the problem, then have to redo your work to return your site to its previous state.

If the error no longer occurs after restoring a backup, this may indicate that a recent modification to your site is causing the issue. If you can think of any likely culprits, you can try testing them first. Otherwise, you’ll need to redo any updates incrementally and check to see if the error returns as a result of a specific change.

Fixing a Server-Side Issue

If none of the above steps resolved HTTP error 407, you may be dealing with a server-side issue. If you have other sites on your server, you can check to see if they are experiencing the same error. This will help confirm if the error is present on a particular site only or if it’s originating on the server.

Let’s look at a few troubleshooting steps to help you resolve error 407 on the server side.

Step 1: Review Error Logs

Error logs record activity on your website and server, including any errors that occur. These logs can show you which connection requests are successful and which are failing.

To access your error logs, open your site’s root folder from your FTP. Then, select the logs folder. Here, you’ll see two options: nginx and php. These folders contain error logs that you can view:

Nginx handles serving, proxying, and caching. Note that if your host uses a different server, the name of this file will be different. Meanwhile, PHP is the scripting language that WordPress runs on. If you search either log for error 407, it may shed some light on why it’s happening and when it started.

Step 2: Check Server Config Files

A common cause for a proxy authentication error is an unexpected redirect. This may look suspicious to a proxy server, causing it to deny access. Therefore, you’ll want to check your web server’s configuration files to see if there are any unintentional redirect instructions.

You can do this by checking the .htaccess file. Using an FTP client, go to your website’s root folder and click on the app folder. Then, select public and you should see the .htaccess file:

Open this file and look for any lines of code that include the term “redirect” or are rewriting URLs. If any of these look suspicious or unnecessary, consider removing them (you may want to make a copy of the file first). Then, check to see if error 407 is still present when you try visiting your site.

Since this code is probably in your .htaccess file for a reason, removing it may cause aspects of your site to stop functioning. However, if this code is the cause of HTTP error 407, you will need to address it. We recommend contacting your hosting provider for assistance.

Step 3: Debug App or Scripts

One last thing you can try is debugging your site. If you’ve recently added custom code or new plugins, there’s a chance that a simple bug could be causing authentication issues. The free Query Monitor can help you comb through the code to look for anything suspicious.

Before you get started, we recommend that you clone your site to a staging environment. This can be easily done using DevKinsta. Then, you can safely try to isolate the events that are triggering error 407.

If you need a little help, you can enable WordPress debugging to get a better look at what is going on. You can also turn on the WordPress debug log to track bugs for you to review later.
Learn how to fix this frustrating error (and keep it from happening again) with help from this guide ✅Click to Tweet

Summary

HTTP Error 407 usually happens when the server is unable to complete a request as the client lacks proper authentication credentials for a proxy server. Since this error can prevent users from accessing your site, you’ll want to fix it straight away.

If the problem occurs on the client side, you can try deactivating your plugins and rolling back recent changes to resolve the issue. If it happens on the server side, you’ll need to check your server configuration files, review your application logs, and debug your apps or scripts.

Either way, the simple fixes above should clear the HTTP error 407, and you will be able to move forward.

Что такое Proxy Authentication Required или Error 407? – это сбой в работе прокси сервисов, которые используются в программах VPN, например, FriGate. Кроме того, ошибка 407 может возникнуть в ряде других программ, которые подключаются к сети через прокси лист: Visual Studio, Key Collector и другие. Однако, наибольшее беспокойство доставляет ошибка HTTP 407 при работе с бесплатными VPN сервисами.

Как исправить Error 407 Proxy Authentication Required? Как настроить компьютер, чтобы решить проблему? Есть ли аналоги программ, которые работают без Proxy? Что делать, если status code 407 Proxy Authentication Required не исчезает? К слову, эта ошибка очень похожа на ошибку 401, только в этом случае ошибка на вашей стороне, а не на стороне сервера. Посмотрите подробный отчет для действий.

Вы спокойно ищите нужную информацию в своем браузере и тут натыкаетесь на ошибку 407. Окошко может иметь разные уведомления, но чаще всего все сводится к следующему: «The request with HTTP status 407: Proxy Authentication Required”. Данное уведомление сообщает, что между вами и сервером возникла ошибка. Причем ошибка 407 возникает только на стороне клиента, т.е. пользователя.

Чаще всего проблема возникает при использовании плагина FriGate – дополнения, которое работает с помощью прокси. Для чего оно у вас стоит? Скорее всего, вы пытаетесь зайти на сайт, который заблокирован провайдером, роскомнадзором или другими органами, которые контролируют интернет трафик. FriGate – это посредник между вашим браузером и сайтом, который вы хотите открыть. Работает он по принципу VPN. Подключаясь к нему, вы создаете видимость подключения из другой страны.

Например, вы хотите попасть на сайт, который закрыт провайдером. Устанавливая FriGate вы подменяете свое настоящее местоположение фиктивным. Провайдер видит трафик, но обращение идет на посторонний сервер. Не будем углубляться в детали – суть одна, FriGate не работает, и вы видите ошибку 407. В чистом браузере ошибка http 407 возникнуть просто не может. Она возникает только ввиду не работающего соединения с прокси.

Что делать, если в браузере возникла ошибка 407? Как устранить Error 407 Authentication Required? Ниже список шагов, которые актуальны именно для проблемы, которая возникла на стороне браузера.

• Если вы использовали платный прокси – выйдите из аккаунта и войдите снова;
• Если вы использовали FriGate – отключите плагин и удалите его из браузера. Затем установите более свежие и обновляемые VPN сервисы. На крайний случай можно использовать платные VPN или установить браузер Opera? Перейти в приватный режим и включить кнопку VPN в адресной строке. Эффект тот же – ошибка 407 вас больше не затронет.
• Если в браузере чисто – закройте программу VPN. Возможно сервер с прокси сегодня не доступен или сама программа перестала корректно работать.
• Установите для теста бесплатную версию платных прокси серверов или VPN сервисов. Если проблема устранена – отлично, проблема ясна.
• Используйте платные прокси. Стоит это дёшево и если есть на, то необходимость, можно потратить в месяц 1$ для стабильности в трафике.
• Пройдите на сайт определения IP адреса. Если у вас выдает ваш стандартный местный ip адрес – у вас проблемы с VPN 100%.

ВАЖНО: Ошибка 407 возникает ТОЛЬКО со стороны вашего компьютера. Сайт, на который вы не можете зайти тут не при чем! Ошибка возникает ТОЛЬКО если у вас установлены дополнения, прокси сервисы или VPN.

Не нужно «лечить» компьютер перезагрузкой или переустановкой системы. Когда у вас болит палец на ноге, вы же не лечите проблему свечами от геморроя? Так и здесь. Таблетка от проблемы и шаги к исправлению ошибки 407 Proxy Authentication Required указаны выше. Ни реестр, ни система, ни антивирус тут ни при чем. Действуйте.

1. Ошибка 407 в программах, работающих через Proxy

Предположим вы – вебмастер. У вас установлена программа Key Collector, которая работает через прокси для безопасности аккаунтов в Яндекс и Google. Кроме того, программа использует прокси лист для ускорения работы парсера.  Вы купили прокси и ввели их в настройках. Другие программы работают по аналогичному принципу. В настройках вы прописываете адрес и данные авторизации.

Что означает ошибка 407 Proxy Authentication Required в программах? На самом деле все просто – либо вы ошиблись при вводе данных авторизации оплаченных прокси, либо ваш прокси лист закончился. Например, вы купили прокси 1 января до 1 марта. Естественно, что вы получите ошибку 407, если сегодня 2 марта. А еще, вы могли попытаться купить прокси как можно дешевле и получили не самый отзывчивый прокси сервер.

Для подобных программ стоит покупать проверенные прокси. Также следует не забывать, что на работе некоторые администраторы ставят защиту от использования подобных программ и прокси. Поэтому, если вы решили «подрабатывать» на работе – займитесь своими прямыми задачами.

Мы помогли вам решить вопрос? Удалось ли вам исправить HTTP 407 Proxy Authentication Required? Если остались вопросы – напишите нам в комментариях с деталями проблемы. В идеале прикрепить скриншот с ошибкой, чтобы наш специалист помог разобраться с проблемой.

I am using cntlm and this works (@Kenith, @blresells, this may be a workaround):

import urllib3
p = urllib3.ProxyManager(
    "http://127.0.0.1:3128/",
    proxy_headers={'Proxy-Connection': 'Keep-Alive'})
r = p.request('GET', 'https://www.google.com')

This does not, and reads exactly like the python requests CONNECT in wireshark:

import urllib3
p = urllib3.ProxyManager(
    "http://127.0.0.1:3128/",
    proxy_headers={})
r = p.request('GET', 'https://www.google.com')

The output in the second case is:

Traceback (most recent call last):
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 696, in urlopen
    self._prepare_proxy(conn)
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 964, in _prepare_proxy
    conn.connect()
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connection.py", line 366, in connect
    self._tunnel()
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/http/client.py", line 907, in _tunnel
    raise OSError(f"Tunnel connection failed: {code} {message.strip()}")
OSError: Tunnel connection failed: 407 Proxy Authentication Required

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/a/Desktop/git/teste-api-maxar/teste.py", line 35, in <module>
    r = p.request('GET', 'https://www.google.com')
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/request.py", line 74, in request
    return self.request_encode_url(
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/request.py", line 96, in request_encode_url
    return self.urlopen(method, url, **extra_kw)
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/poolmanager.py", line 532, in urlopen
    return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/poolmanager.py", line 375, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen
    return self.urlopen(
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen
    return self.urlopen(
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen
    return self.urlopen(
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/connectionpool.py", line 755, in urlopen
    retries = retries.increment(
  File "/srv/miniconda/envs/apimaxar/lib/python3.9/site-packages/urllib3/util/retry.py", line 574, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.google.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required')))

So, the real issue is that:

1. Python requests does not send the ‘Proxy-Connection’: ‘keep-alive’ header by default, like Firefox and curl do (also does not send the Host and the User-Agent, but for my setup that is not important).
2. As far as I know, there is no way for the user to add a proxy_headers to a python requests session.

There is a simple workaround, though, which is to revert to urllib3 which exposes lower level funcionality.