Problem: Certificate error appears upon visiting the controller page.
Errors like this may appear without a valid SSL certificate when visiting sites on HTTPS.
Possible causes / recommended actions
1. Missing a valid SSL certificate
UniFi relies on HTTPS for extra security. This means that the browser will check for valid certificates when making a secure connection to the web server. Although the alert message may prove annoying, there's no risk to the connecting user. To avoid this error:
- Buy a signed SSL certificate from any web hosting provider.
- Then make the following changes to the controller:
sudo su - # cd <unifi_base> # on Windows, "%USERPROFILE%/Ubiquiti Unifi" cd /usr/lib/unifi # create new certificate (with csr) java -jar lib/ace.jar new_cert <hostname> <company> <city> <state> <country> # your CSR can be found at /var/lib/unifi # - unifi_certificate.csr.der # - unifi_certificate.csr.pem # have this CSR signed by a CA, you'll get a few certificates back... # copy the signed certificate(s) to <unifi_base> # import the signed certificate and other intermediate certificates java -jar lib/ace.jar import_cert <signed_cert> [<other_intermediate_root_certs>...]
If the error "Unable to import certificate into keystore" appears when importing the signed certificate & intermediate certs, try the following steps:
1. Edit the certificate file and remove any blank spaces after each line of the cert.
2. Save changes re-import the certificate.
2. Adopting UniFi for the first time
This error should not be confused with the one seen when adopting a Cloud Key for the first time for example. This error can safely ignore it by:
1. Click Advanced
2. Click Proceed to <your IP>
Verify if this is your case by seeing our UniFi - How to Setup your Cloud Key and UniFi Access Point (for beginners) article (in step 3.5 of the section 3. Configuring your Cloud Key & Access Point).