Scanning persists to fail though everything in Diagnostic tab is green i.e OK

Thanks for reaching out.
Can you do the following so I can get the information I need to help you?

• Kill the existing scan if it is still running (The “Start New Scan” button turns in to a “Stop” button while the scan is running)
• Go to your Scan > Scan Options and Scheduling page and locate the “Performance Options”
• Set “Maximum execution time for each scan stage” to 20 on the options page
• Click to “Save Changes”
• Go to the Tools > Diagnostics page
• In the “Debugging Options” section check the circle “Enable debugging mode”
• Click to “Save Changes”.
• Start a new scan (Be patient as it may take a little time to complete and is going to pause every 20 seconds before the scan starts again from where it left off)
• Copy the last 20 lines from the Log (click the “Show Log” link) or so of the activity log and paste them here

Also, can you send a diagnostic report to wftest [at] wordfence [dot] com? You can find the link to do so at the top of the Wordfence Tools > Diagnostics page. Please add your forum username where indicated and respond here after you have sent it.

Note: For the fastest response time, please make sure and add any information or questions directly to this post and not the email address above.

Tim

Having the same issue, however the diagnostics page is showing one error on:
Connecting back to this site
wp_remote_post() test back to this server failed! Response was: 416 Requested Range Not Satisfiable
This additional info may help you diagnose the issue. The response headers we received were:

Ran the degubbing for you, here’s the results:

[Nov 04 15:42:29] Calling Wordfence API v2.26:https://noc1.wordfence.com/v2.26/?k=9b22d6d8fafa3cee1de61231f7dec5bebe00de6aca4571fa17463fdbbd250a307a22c453329800db02d9f28c84d0ae3f6fde81a6b7324bb5690801b17ea4707dde4528cfec92395ee581c2b40cb07f49&s=eyJ3cCI6IjUuMi40Iiwid2YiOiI3LjQuMCIsIm1zIjpmYWxzZSwiaCI6Imh0dHBzOlwvXC93d3cudGJtYnJha2VzLmNvbSIsInNzbHYiOjI2ODQ0Mzk4MywicHYiOiI3LjAuMzMiLCJwdCI6ImNnaS1mY2dpIiwiY3YiOiI3LjY2LjAiLCJjcyI6Ik9wZW5TU0xcLzEuMC4ydCIsInN2IjoiQXBhY2hlIiwiZHYiOm51bGx9&betaFeed=0&action=timestamp
[Nov 04 15:43:13] Ajax request received to start scan.
[Nov 04 15:43:13] Entering start scan routine
[Nov 04 15:43:13] Got value from wf config maxExecutionTime: 20
[Nov 04 15:43:13] getMaxExecutionTime() returning config value: 20
[Nov 04 15:43:13] Test result of scan start URL fetch: array ( ‘headers’ => Requests_Utility_CaseInsensitiveDictionary::__set_state(array( ‘data’ => array ( ‘date’ => ‘Mon, 04 Nov 2019 23:43:13 GMT’, ‘content-type’ => ‘text/html; charset=iso-8859-1’, ‘set-cookie’ => ‘__cfduid=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx; expires=Tue, 03-Nov-20 23:43:13 GMT; path=/; domain=.tbmbrakes.com; HttpOnly’, ‘cf-cache-status’ => ‘DYNAMIC’, ‘expect-ct’ => ‘max-age=604800, report-uri=”https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct”‘, ‘server’ => ‘cloudflare’, ‘cf-ray’ => ‘530a72eb2c0aebdd-LAX’, ), )), ‘body’ => ‘Invalid Request’, ‘response’ => array ( ‘code’ => 416, ‘message’ => ‘Requested Range Not Satisfiable’, ), ‘cookies’ => array ( 0 => WP_Http_Cookie::__set_state(array( ‘name’ => ‘__cfduid’, ‘value’ => ‘d80865f3580df860d27314f13b4a7c1e51572910993’, ‘expires’ => 1604446993, ‘path
[Nov 04 15:43:13] Starting cron via proxy at URL https://noc1.wordfence.com/scanp/www.tbmbrakes.com/wp-admin/admin-ajax.php?action=wordfence_doScan&isFork=0&scanMode=standard&cronKey=c8fa9aa7fc40f1a77cf68a506404e112
[Nov 04 15:43:13] Scan process ended after forking.

• This reply was modified 5 years ago by tbmbrakes.

Sorry for the delayed reply. Did you try checking the “Start all scans remotely” option in the Debugging Options section on the Wordfence Tools > Diagnostics page on your site? You might also have to whitelist your server IP in Cloudflare as well as our IP Address Range.

Tim