Sucuri website firewall cloudproxy access denied

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Access Denied: Sucuri Website Firewall Error [Fixed]

jennifer tomas

Posted by Jennifer Tomás on October 12, 2021

Acceso denegado: Sucuri website firewall error: ¿Cómo lo resolvemos?

Have you fixed the website error “Access disabled to Sucuri’s website firewall”? Podemos ayudarlo con esto.

Sucuri Firewall is a web application firewall that is alojado en la nube. Any attempt to pirate or asalto al site web crashes immediately.

As part of our services for the administration of servants, Bobcares receives frequent requests from customers to address this problem.

Echemos un vistazo a cómo nuestros ingenieros de soporte están solving este problema hoy.

What caused the error ‘Acceso denegado – Firewall del site web de Sucuri’?

Sucuri Firewall is one of the most effective web application firewalls on the market. Also, have a good job to protect WordPress websites in the host.

También maintains the sitio web seguro al protegerlo de amenazas externas.

Access denied errors appear on the website if the website unintentionally blocks Sucuri’s IP addresses.

The error message, for example, is displayed as shown below.

How to quickly resolve a Sucuri error?

We see many customers having problems with Sucuri at Bobcares, where we have over a decade of experience maintaining servers.

Let’s see how our support engineers solve this problem.

The “Access Denied – Sucuri Website Firewall” issue was just brought to our attention by one of our customers. When he tried to browse his website, he got this error.

Upon further investigation, we discovered that the user’s WordPress was protected by the Sucuri firewall. And he was banning his own IP address as a result of that. As a result, the website displayed an access denied error.

As a result, we’ve whitelisted Sucuri’s IP addresses in the .htaccess file.

The code we used in the .htaccess file is shown below.

<FilesMatch “.*”> Order deny,allow Deny from all Allow from 192.88.134.0/23 Allow from 185.93.228.0/22 ​​Allow from 66.248.200.0/22 ​​Allow from 208.109 .0.0/22 ​​Allow from 2a02:fe80::/29 </FilesMatch> Using IPtables for whitelist

Additionally, we whitelist IP addresses on the server based on the firewall configuration. If we use IPTables, we will whitelist the Sucuri IP addresses in the IPTables firewall.

For example, we contributed whitelisting of the following IP address range in IPTables.

iptables -A INPUT -i eth1 -s 192.88.134.0/23 -j ACCEPT

Initially, we were using SSH to connect to the server.

iptables -A EXIT -i eth1 -d 192.88.134.0/23 -j ACCEPT

Then incoming connections from 192.88.134.0/23 were allowed.

Conclusion

When Sucuri’s IP addresses are blocked on the server, the website displays the notice “Access Denied – Sucuri’s Website Firewall”. Today we saw how our support engineers were able to fix this issue by whitelisting Sucuri IP addresses.

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jennifer tomas October 12, 2021

Access Denied – Sucuri Website Firewall error: How we resolve?

by Ansu Anto | Dec 21, 2019

Trying to resolve the website error ‘Access Denied by Sucuri Website Firewall’? We can help you with it.

The Sucuri Firewall is a cloud-based web application firewall. It blocks any hack or attack attempts on the website instantly.

At Bobcares, we often get requests from our customers to fix this error as a part of our Server Management Services.

Today, let’ see how our Support Engineers fix this error.

 

Why does ‘Access Denied – Sucuri Website Firewall’ error occur?

Sucuri Firewall is one of the best Web Application Firewall. Moreover, it works well in protecting WordPress websites in the server.

Also, it protects the website from external attacks keeping it safe.

However, if the website blocks the Sucuri IP addresses unknowingly, then access denied errors show up on the website.

For instance, the error message appears as shown below.

Access the Sucuri WordPress website firewall

 

How we fix Sucuri error easily?

At Bobcares, where we have more than a decade of expertise in managing servers, we see many customers facing problems with Sucuri.

Now, let’s see how our Support Engineers fix this error.

Recently, one of our customers approached us with the error ‘Access Denied – Sucuri Website Firewall‘. He received this error while accessing his website.

On checking, we found that the user had a Sucuri firewall set on his WordPress. And this was blocking its own IP address. Thus it was displaying access denied error on the website.

So, we whitelisted the Sucuri IP addresses by adding them to the .htaccess file.

Here is the code that we used in the .htaccess file.

<FilesMatch “.*”> Order deny,allow Deny from all Allow from 192.88.134.0/23 Allow from 185.93.228.0/22 ​​Allow from 66.248.200.0/22 ​​Allow from 208.109 .0.0/22 ​​Allow from 2a02:fe80::/29 </FilesMatch>

 

Whitelist with IPtables

In addition, we also whitelist server IP addresses based on the firewall used. In case we use IPTables, we will whitelist the Sucuri IP addresses in the IPTables firewall.

For example, we helped to whitelist the IP address range in IPTables as follows.

Initially, we connected to the server via SSH.

Subsequently, we allowed incoming connections from 192.88.134.0/23

iptables -A INPUT -i eth1 -s 192.88.134.0/23 -j ACCEPT

Then allowed outgoing connections to 192.88.134.0/23

iptables -A EXIT -i eth1 -d 192.88.134.0/23 -j ACCEPT

Thus, we whitelisted the range of IP addresses. Finally, the Sucuri error was resolved.

 

[Need any assistance in fixing Sucuri related errors? – We’ll help you]

 

Conclusion

In short, the website shows the ‘Access Denied – Sucuri Website Firewall’ message when the Sucuri IP addresses are blocked in the server. Today, we saw how our Support Engineers fixed this error by whitelisting the Sucuri IP addresses.

Related Articles:

  1. WordPress multisite redirection loop: new tricks to resolve the error
  2. How to use Fail2ban to avoid attacks from starting WordPress session
  3. How to Fix the 405 Method Not Allowed Error on WordPress Site
  4. WordPress “Could Not Save Password Reset Key To Database” Error

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6 Comments

  1. dymond C

    dymond C on 2021-04-14 at 11:42

    I work for 211 and need access tot his site, I had it before not sure why I don’t now.

    Reply

    • Arya MA

      Arya MA on 2021-04-22 at 11:03

      Hi there,

      Can you please confirm if your IP addresses are whitelisted at the server end? If you still find problems, we’ll be happy to talk to you on chat (click on the icon at right-bottom).

      Reply

  2. Angelina Mateo

    Angelina Mateo on 2021-10-15 at 19:50

    I want to unblock Webex can you’ll help me please

    Reply

    • Maheen Aboobakkar

      Maheen Aboobakkar on 2022-07-14 at 12:56

      We’ll be happy to talk to you on chat (click on the icon at right-bottom).

      Reply

  3. Deepak

    Deepak on 2022-02-14 at 10:12

    in order to activate my elementor pro account its showing error( forbidden). i dont know why this issue is showing for me

    Reply

    • Hiba Razak

      Hiba Razak on 2022-07-13 at 11:10

      Please contact our support team via live chat

      Reply

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Sucuri Firewall Troubleshooting Guide

If you’re having trouble with our Website Application Firewall (WAF), don’t worry. It’s optimized for all types of websites, including those on a CMS or built with custom code. Proceed through the steps below and if you still have trouble, don’t hesitate to contact us.

Step 1: Is the WAF enabled?

It might sound odd, but we’ve received requests for firewall support only to find the WAF isn’t enabled. This is easy to confirm without accessing the Sucuri control panel using a tool such as ViewDNS. Make sure the IP addresses fall somewhere in the range of 192.124.249.x, and be sure to check the www. of your domain. However if you are not using Sucuri nameservers just make sure that you verify that the IP address matches the IP located in the Sucuri account under that firewall.

Step 2: Is your Sucuri SSL configured?

Your Sucuri SSL should be configured in one of two ways:

Via Sucuri/GoDaddy: This is an automated process. The system generates an SSL for you automatically. However, this process happens after the DNS change, which causes a brief interruption of functionality in the website (typically about 15 minutes) as GoDaddy requires that time to generate and validate the certificate.

It isn’t possible to use the GoDaddy SSL without experiencing a bit of downtime during the initial setup via this method. This is because the SSL generation and verification is not immediate, and cannot be completed before the DNS has been pointed to the Sucuri firewall without additional steps.

Propagation time may cause these results to fluctuate depending on server-side and DNS caching/propagation. After a few hours, the SSL will be completely functional automatically on the domain.

Uploading a custom SSL is the only way to avoid this window of downtime. It does mean that you would need to manually renew the SSL in the future, whereas we can take care of this for you with no risk of downtime if you’re using ours.

Via Upload: This is the most straightforward approach if you already have an SSL certificate. Just upload the SSL certificate to our system prior to the DNS change here. This way, once the DNS cutover is live, the browser will also see the certificate you have on the host server avoiding all types of issues.

Step 3: Are you getting errors?

Our WAF will rarely produce errors but verifying the error you see is typically quick and straightforward. Look below to find any errors you’re seeing, and then try the suggested next steps.

404 Errors This means the whole site could be affected. Make sure you have the correct host IP/cname set as origin. If the 404 you’re seeing is Sucuri branded, make sure your DNS A records are pointing to the correct Sucuri WAF IP.

Also check to see if it’s just a single page or item that’s affected. If so, replace the missing resource or remove the reference to it in the site code. 404 errors may appear as broken pages caused by missing elements such as CSS with no other error. You can identify missing resources and its reference with a tool like WebPageTest (look in the waterfall tab).

302 Errors Redirect loops are usually identified with an error in the browser. While the WAF won’t be the cause of these, you could be caching a loop from the host. Changing to site caching might help. If you have HTTPs only site set in your SSL tab, this could be conflicting with our 301 redirect, so try disabling it. If you are redirecting your http address to https, it is preferable to use HTTPs only site, if possible.

401 Errors These are messages from the host indicating you are required to log in to see this resource. You normally see these when accessing a page that you would normally need to be logged in to view.

500 and 501 errors These are usually accompanied by an internal message from the server. They will always come from the hosting server and are usually related to misconfiguration. Checking the host error logs should provide a cause.

502 errors These will be Sucuri branded and are normally caused by a firewall on the hosting server blocking WAF IP addresses. See our IP address ranges:

192.88.134.0/23 185.93.228.0/22 ​​66.248.200.0/22 ​​2a02:fe80::/29 208.109.0.0/22

Ceux-ci doivent figurer sur la liste blanche de l’hôte et ne sont soumis à aucune limitation de débit. Si vous ne parvenez toujours pas à trouver la cause, ouvrez un ticket d’assistance pour demander les journaux d’erreurs à Sucuri afin de pouvoir les vérifier avec les journaux d’erreurs de l’hôte pour trouver la cause.

503 Errors These are due to resource issues, misconfigurations or database errors. Check the host’s access and error logs to find a cause. Also note, this also could be due to abnormal load, either legitimate (which the access logs would confirm) or due to a DDoS attack, in which case you should contact Sucuri immediately.

504 Errors Similar to the 502 errors above, these will be Sucuri branded. And like 502 errors, these can be caused by a firewall on the hosting server blocking the WAF IPs. Make sure our IP ranges are whitelisted, as with the 502 errors. However, more often 504s are caused by the host failing to respond to a request within 180 seconds. If you are unable to find the cause, request the error logs from Sucuri and verify them with the host’s error logs to find the cause. Find more useful advice on troubleshooting response timeout errors here.

Step 4: Are you getting blocks?

Blocked messages are branded and display content. Find the block ID here. If you need help troubleshooting and resolving these issues, It’s important to give our team the entire text content of the message (select all, copy, and paste). It’s also useful to know the context of the issues, such as who’s affected, their IP address (which can be found here) and how to replicate the issue. If there isn’t a block message, a screenshot and the IP address can be provided in its place.

Step 5: Are you having caching issues?

These issues are fairly tricky to identify. It’s when content looks like it should’ve updated, or it’s wrong for the device/browser you’re using to view it. For example, it could be you’re seeing public content when you’re really logged in to a private account. It’s best to bring these to Sucuri’s attention by creating a ticket and providing as much detail as possible, including the page where you see the issue. We can also cache some bad behavior from the website code on the host. These could include a 302 redirect loop or even a 404 error. The cache can be cleared using one of the methods described below.

5.1 Clearing the Sucuri Firewall Cache

There are a few ways you can clear the Sucuri Firewall cache:

Dashboard Cache Options To clear all page and file cache at once, go to Performance ,and from Clear Cache – Global, click Clear Cache.

Borrar almacenamiento in hidden

To clear the cache for individual pages or files, go to Performance, and from Clear Cache – Per File, enter the file URL you wish to clear, and then click Clear Cache.

Borrar hidden by archivo

API Cache Options If you’d like a faster way to clear your site cache, you can also use the Website Firewall API. Log into the Website Firewall dashboard, go to API, and then click API Details. There you will see a Clear Cache (Website Firewall API v1) button. Click it, and you will clear the cache using the Website Firewall API.

You can bookmark the page so that any time you want to clear the cache you simply have to visit the bookmarked page.

Each site does have their own unique API key. If you require a large list of clear-cache APIs for your domain inventory, notify your account rep who can retrieve that list for you.

API caching options

5.2 About Caching Modes

We operate our own Global CDN so there is some level of caching being performed on your websites. Let’s review the current cache options available to you. You can see them all under Performance > Caching Level in Sucuri Firewall’s settings, also found here:

Levels of almacenamiento in hidden Sucuri

Here is what each option means:

Enabled (recommended) – Enabled (selected by default) will cache your pages and redirects for 180 minutes and 404 for 4 minutes. This is the best option when it comes to site performance, but the sessions may also get cached if you have login capabilities on the site. Cached sessions would be the reason Customer B logs into their account only to see the account information of Customer A, who logged in first.

Minimal caching (only for a few minutes) – Minimal will cache your pages for 8 minutes, redirects for 15 minutes, and 404 for 2 minutes. This is the best option when you need to make constant updates to your site, such as newspapers or blogs.

Site caching (using your site headers) – Site Caching won’t cache page content for logged-in users. It redirects for 3 hours and 404 for 4 minutes. This is the best option if you run a custom CMS, a forum like vBulletin, or an ecommerce store. Cache headers sent by your application/server will be respected, so if your application doesn’t send the “no-cache” headers it may cache your page content.

Disabled (use with caution) – Disabled won’t cache page content for logged-in users, redirects for 10 minutes, and 404 for 1 minute — but note that it can slow down your site. Cache headers sent by your application will be respected, so if your application doesn’t send the “no-cache” headers it may cache your pages content.

Important Note: Regardless of the caching level you chose, the Sucuri Firewall will continue to cache static files such as images, .swf, .css, .js, .pdf, .txt, .mp3, .mp4 and fonts. If your web servers instructs otherwise, like “Cache-Control: public, max-age=XXX” the Firewall will follow the instruction and cache for that XXX seconds.

Step 6: Is there just a blank screen?

Whitelisted IPs are not blocked by the IDS unless something very bad is being caused by the user on the host, such as too many 50x errors.

These IDS blocks last 20 minutes. If they return or persist, get your IP address here so we can confirm the cause and address the underlying issue.

There are two possibilities here:

  1. Our IDS (Intrusion Detection System) is blocking you. You or someone sharing your IP address have triggered the IDS with too many prohibited actions, such as multiple 30x, 40x or 50x in a short period of time, or 20 failed login attempts in a few minutes. Normally, the browser would’ve seen these previous errors and ignored them.

  2. Another cause of white screens are often known as the “white screen of death.” These are 500 internal server errors, and the host’s error logs can usually confirm the cause. These can be identified using developer tools such as Chrome Inspector.

Step 7: Are attackers able to bypass the WAF?

The best way to prevent hackers from bypassing our Firewall is by limiting their direct access to your origin server. To do this, add restrictions to your .htaccess file so that only our Firewall’s IP will be able to access your web server.

However, before you do this, make sure your DNS changes are fully propagated, as you may block valid visitors whose DNS has old information. Four hours is usually enough.

Review the server suitable for the hosting setup and aggregate the code for Apache and the .htaccess archive. Para Nginx, deberá aggregarlo knew archive of configuration of Nginx.

Apache Server 2.4

<FilesMatch “.*”> Requires ip 192.88.134.0/23 Requires ip 185.93.228.0/22 ​​Requires ip 2a02:fe80::/29 Requires ip 66.248.200.0/22 ​​< /FilesMatch>

Apache Server 2.2

<FilesMatch “.*”> Deny command, allow Deny from all Allow from 192.88.134.0/23 Allow from 185.93.228.0/22 ​​Allow from 2a02:fe80::/29 Allow from 66.248.200.0/22 ​​</FilesMatch>

Nginx Server

location / { allow 192.88.134.0/23; allow 185.93.228.0/22; allow 2a02:fe80::/29; allow 66.248.200.0/22; Deny all; # Existing NGINX rules }

7.1 Omission of the WAF to realize evidence with the archive of hosts

Primero, debe buscar y copier su dirección IP de hospedaje accediendo a la page de Dirección IP de hospedaje del panel de WAF aquí .

Direction IP de alojamiento

Los siguientes pasos dependen de su sistema operativo, pero los cubrimos todos aquí.

7.2 Manejo de errors 403 to omit

If you are implementing Firewall Override Prevention, you should aggregate your Propia IP to the FileMatch directive:

<FilesMatch “.*”> Order deny,allow Deny from all Allow from 192.88.134.0/23 Allow from 185.93.228.0/22 ​​Allow from 66.248.200.0/22 ​​Allow from 208.109 .0.0/22 ​​Allow from 2a02:fe80::/29 Allow from INSERT YOUR IP HERE </FilesMatch>

Si aún tiene problemas o tiene preguntas, abra un ticket de soporte si aún no lo ha hecho. Entonces ven a chatear con nuestro equipo en https://sucuri.net/live-chat/ y estaremos encantados de echarle un vistazo.

Was this article helpful to you?

Updated on December 16, 2019

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