How to Fix the 'HTTP/1.1 Service Unavailable” Error on Browsers - MiniTool

Is encountering "HTTP/1.1 service not available" error? don’t worry! This article will guide you through this issue, which often occurs when visiting a specific website or unified gateway login page.

HTTP/1.1 service unavailable error

The HTTP/1.1 service unavailable error is also called the HTTP status code. Some users encounter this error when trying to access a specific website or unified gateway login page. Here are some of the reasons for this problem:

• Poor network connection
• Windows Add-ons
• Website backend issues
• Browser outdated or broken
• DNS issues
• Insufficient disk space
• Resource exception
• Cache corrupted
• ...

How to fix HTTP/1.1 service unavailable error

Method 1: Try some basic fixes

First, try some basic fixes: restart your computer and refresh your browser. Then, check your internet connection. If the problem persists, try the following solution.

Method 2: Try to access the unified gateway page

Try to access the unified gateway page to resolve the "HTTP/1.1 service not available" issue. The specific steps are as follows:

Step 1: Add the store server as a service and try to check for connectivity or port issues using a connection monitor (such as ICMP or TCP defaults).

Step 2: Allow the firewall's store IP to go through port 443.

Step 3: Open the store settings to ensure that there is no mismatch of port 443 in the unified gateway configuration.

Step 4: Check if the following expression is missing in the store name:

REQ.URL.PATH.SET_TEXT_MODE(IGNORECASE).STARTSWITH("/Citrix/STORE_NAME

Step 5: Add the above code to your content switching policy. Then try to access the unified gateway page.

Method 3: Check the date and time

Even if the date and time are correct, the error still appears and you may need to turn off Internet time synchronization. The steps are as follows:

Step 1: Press Windows I to open settings .

Step 2: Go to Time and Language > Date and Time .

Step 3: In the right pane, enable the Automatic Time Set option.

Method 4: Clear SSL status

Sometimes the SSL state causes an unavailable HTTP/1.1 service error. Therefore, you can clear the SSL state to resolve the issue.

Step 1: Open Control Panel (View by Category ) in Windows 10.

Step 2: Click the Network and Internet > Network and Sharing Center > Internet options .

Step 3: Under the Contents tab, click Clear SSL status .

Step 4: Save the changes and restart the browser to see if the problem has been resolved.

Method 5: Clear cookies and caches

Clearing the cache may help resolve the "HTTP/1.1 service not available" issue. The steps are as follows:

Step 1: Open Google Chrome and click the three dot buttons in the upper right corner.

Step 2: Select More Tools and click Clear Browse Data .

Step 3: In the pop-up window, set the time range to all times . Select the Cookie and other site data and cached images and files options. Then click Clear Data .

Method 6: Check for viruses or malware

You can use Windows Defender to check for malware and viruses to resolve the issue. Follow these steps to perform a full scan:

Step 1: Press the Windows I key at the same time to open the settings .

Step 2: Go to Update & Security > Windows Security > Turn on Windows Security .

Step 3: In the new window, click Run New Advanced Scan .

Step 4: Select Full Scan and click Scan Now . Wait for the process to complete, and then you can check if mrtstub.exe is a virus.

Method 7: Clear DNS cache

Try clearing the DNS cache and resetting the IP address. The steps are as follows:

Step 1: Enter cmd in the search box. Then right-click the command prompt and select Run as administrator .

Step 2: In the Command Prompt window, enter the following commands and press Enter after each command:

ipconfig /flushdns

ipconfig /registerdns

ipconfig /release

ipconfig /renew

Then restart your computer and try to visit the website to check if the "HTTP/1.1 service is not available" error still exists.

If all of the above methods do not work, you can try updating your browser and disabling Windows add-ons.

Summarize

This article describes some ways to fix the "HTTP/1.1 service is not available" error. If you encounter the same error, try these solutions. If you have other solutions, please share them in the comment section.

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