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There are a lot of Sophos Firewall errors
out there. Way too many, right?

 

You as a Sysadmin know that for sure – Internal Server problems, Link errors, Configuration errors,
Timeout messages, and Bad Gateway issues.

Here's a list of the most common errors around Sophos Firewall errors and the proven solution to them: 

  1. Sophos Firewall error “404 – Not Found” or Timeout Page when logging into SCFM
  2. Sophos UTM “Invalid Certificate” Error
  3. Sophos Firewall “Interface Link Error”
  4. Sophos UTM “ 500 Internal Server Error” or “Internal Server Error”
  5. Sophos Firewall “502 Bad Gateway Error”

 

And you'll find the solution to get rid of ALL Sophos Firewall errors – forever: Test PRTG and get started within minutes!

 

 1. Sophos Firewall error

"404 – Not Found" or "Timeout Page when logging into SCFM"

 

time blueQuick fix

Error 404 – Not Found is sometimes experienced when trying to login to Sophos Central Firewall Manager (SCFM).

If you are experiencing Error 404 or if you are unable to login to SCFM, reach out to the Sophos support team.

 

Best Solution:

https://community.sophos.com/kb/en-us/133814

 

 Proper fix

Switch to PRTG: PRTG network monitor supports Sophos UTM firewalls and provides constant updates about the status of your firewall.

Find out how PRTG’s Firewall Monitoring can help you get rid of Sophos Firewall Timeout Errors

 

 2. Sophos Firewall error

Sophos UTM "Invalid Certificate" Error

 

time blueQuick fix

The Sophos UTM certificate error occurs when using web filtering and accessing the https website.

To solve the issue, install the UTM-generated SSL certificate into your systems by following the instructions provided in the Sophos Knowledge Base:

https://community.sophos.com/kb/en-us/115315#How%20to%20deploy%20the%20Proxy%20CA

Also note that the issue mostly appears when using Firefox. For a quick solution, try using a different browser.

 

Best solution:

https://community.sophos.com/products/xg-firewall/f/initial-setup/104589/ca-setup

 Proper fix

Switch to PRTG: PRTG network monitor supports Sophos UTM firewalls and provides constant updates about the status of your firewall.

Find out how PRTG’s Firewall Monitoring can help you get rid of Sophos Firewall Timeout Errors

 

3. Sophos Firewall error

"Interface Link Error"

 

time blueQuick fix

The Sophos firewall link error comes up when the UTM is communicating with the connect peer, but the ISP connection is down. The error can also be caused by an incorrect configuration of the IP address.

 

To solve the issues, check on the packet communication and on the correct configuration of the IP address.

 

Best solution:

https://community.sophos.com/products/unified-threat-management/f/web-protection-web-filtering-application-visibility-control/95425/web-filter-log-only-shows-input-output-errors

 Proper fix

Switch to PRTG: PRTG network monitor supports Sophos UTM firewalls and provides constant updates about the status of your firewall.

Find out how PRTG’s Firewall Monitoring can help you get rid of Sophos Firewall Timeout Errors

 

4. Sophos Firewall error

Sophos UTM "500 Internal Server Error" or "Internal Server Error"

 

time blueQuick fix

Do you get the error message “Internal Server Error” or error code 500 when trying to login to the Sophos firewall web interface? This error means that the server encountered an internal error and could not complete your request.

To find more information on the cause of the problem, check /var/log/httpd.log. In most cases, restarting the WebAdmin can solve the issues. Restart the WebAdmin using ‘/sbin/init.d/httpd restart‘.

 Proper fix

Switch to PRTG: PRTG network monitor supports Sophos UTM firewalls and provides constant updates about the status of your firewall.

Find out how PRTG’s Firewall Monitoring can help you get rid of Sophos Firewall Timeout Errors

 

5. Sophos Firewall error

"502 Bad Gateway Error"

 

time blueQuick fix

The 502 Bad Gateway error message occurs when the web server and the Sophos firewall use a different cipher. IIS6 supports 128 bit high cipher only on RC4 suites, while Sophos Firewall supports the cipher on AES suites.

In order to solve the issue, you need to install a Microsoft hotfix to support AES 128-bit and 256-bit cipher suites on the legacy web server.

 

Best Solution: 

https://community.sophos.com/kb/en-us/126972

 Proper fix

Switch to PRTG: PRTG network monitor supports Sophos UTM firewalls and provides constant updates about the status of your firewall.

Find out how PRTG’s Firewall Monitoring can help you get rid of Sophos Firewall Timeout Errors

 

Choose your solution: Bugfix or replacement

 

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With PRTG you'll never have to deal with
Sophos Firewall errors again. Ever.

 

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    PRTG monitors your entire inbound/outbound network traffic
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    PRTG sends constant updates about the status of your firewall

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    With PRTG, you receive automated notifications when network security is in any way compromised

 

Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.

 
 

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