Extend WiFi To An Outdoor Office Or Shed

Getting internet to an outdoor building isn't always as straight forward as it should be. WiFi is a low output power and high frequency medium that does not penetrate well or reach far. In order to make WiFi effective it must be in close proximity.

Network cable isn't always a solution either as ethernet cable length is limited to max 100 meters. So how are you supposed to get internet to an outdoor shed /office?

How To Extend WiFi/Internet to a shed or outdoor building

If the outdoor building is within 100 meters then the best solution is to lay an ethernet cable, this gives the best performance and zero latency. But, sometimes this isn't possible or cost effective. Lets look at the wifi alternative.

To extend internet to an outdoor shed the most obvious solution is to make use of an outdoor point to point WiFi link. This involves installing ethernet cabling from the main house router to the roof where a point to point WiFi bridge unit is installed.

On the outdoor building/office/shed the same has to happen, an outdoor WiFi bridge unit is installed on the roof with ethernet cable leading down in to the shed. At the end of the ethernet cable a single device can be connected or if needed a WiFi access point can be installed that will provide WiFi coverage to that area.

It is important to note that this type of connection requires line of sight and can work up to 5km.

Get in touch with a WiFi specialist for more information.

 

 

 

 

DKIM Validation – “Fail, message has been altered”

What is DKIM?

DKIM - or DomainKeys Identified Mail is an email authentication method. DKIM adds a digital signature to every outgoing message. This signature is examined by receiving mail servers to determine if the message was really sent from the sending domain.

Do I need DKIM?

DKIM help protect your domain from spoofing. DKIM also help to prevent your mail from being tagged as spam. DKIM is a MUST!

Implementing DKIM

It's always best to consult your email hosting company for documentation on how to implement DKIM properly.

DKIM is implemented by adding a TXT record to the domain's DNS zone file. Typically a DKIM entry consists of a "Host" entry and "TXT value"

DKIM Validation

It is very important to test DKIM once implemented. I use DKIM Validator

You can validate your DKIM by sending a test message to the randomly generated email address created on the DKIM validator website.

Once the test email has been sent, go to the DKIM validator website and click the "View Results" button.

Inspecting the "DKIM Information" section will show details about the encryption, public key, headers, public key DNS lookup and validation.

The important part to confirm if validation succeed is under the "Validating Signature" heading.

A successful entry should have " Result = Pass"

An unsuccessful entry could have "Result = Fail" "Details: Message has been altered"

DKIM Validation Fail - Message has been altered

If you get this error you can try the following:

  • Verify the DKIM entry is set up properly - check documentation for your specific host
  • Do a test from webmail, if validation succeeds then in points to the message being changed from email client in transit to the server
  • Get in touch with your hosting company technical support to verify DKIM has been implemented correctly
  • Check email server settings
  • Try a different email client - as weird as it seems I had this issue using Windows Mail, when I swapped over to Microsoft Outlook validation succeeded.

Windows Mail causing DKIM validation fail Message has been altered

A client approached me indicating that they have mail deliverability issues. Messages were not sent as DKIM has not been working. Upon sending a test to DKIM Validator I got "Result = Fail" "Details: Message has been altered"

The client was using Windows Mail for a mail application.

Even after checking, removing and re adding the DKIM record it made no difference. The hosting company tech support was not helpful as per them everything was set up and working the way it should on there end.

I tried setting up a new mail account on a different computer with Windows Mail but had the same issue "Result = Fail" "Details: Message has been altered". Sending test emails from webmail worked fine.

You guessed it, Windows Mail was the culprit, I installed Microsoft Outlook, added the account and Bingo, Validation result = PASS.