Check the TLS certificate is valid and not due to expire
These checks look at the validity of the TLS certificates for:
- www.gov.uk at the edge (Fastly)
- www.gov.uk at the origin (our servers)
- www.staging.publishing.service.gov.uk at the edge (Fastly)
- www.integration.publishing.service.gov.uk at the edge (Fastly)
- *.publishing.service.gov.uk, *.staging.publishing.service.gov.uk and *.integration.publishing.service.gov.uk at the origin (our servers), depending on the environment Icinga is running in
You’ll start seeing an alert 30 days before the relevant certificate is due to expire.
See renew a TLS certificate for GOV.UK for details of how to renew the relevant certificate. This is normally done by Reliability Engineering.
Production www.gov.uk certificate
The TLS certificate for www.gov.uk is managed by Fastly. They will open a support ticket when the certificate is due for renewal. This ticket will be picked up by Reliability Engineering, who will co-ordinate with Fastly to renew the certificate.
Production, staging and integration wildcard certificates
The wildcard TLS certificates for production, staging and integration are managed by Reliability Engineering. Once the alert appears, they will work to renew the relevant certificate and make it live. For staging and integration, the certificates are also provided to Fastly to enable TLS for our staging and integration CDN environments.