Satellite fallback is a backup communications path that keeps data, voice, or control traffic moving when a primary terrestrial, microwave, or cable link is degraded or unavailable. It is commonly used in remote regions, maritime operations, critical infrastructure, and disaster recovery setups where a single cut cable or local outage could isolate a site.
In cybersecurity, satellite fallback matters because availability is part of security. Defenders use it to preserve command-and-control, incident reporting, and emergency coordination during outages, while attackers may try to disrupt it with jamming, physical interference, credential theft, or abuse of the management systems that configure the link. Good designs treat satellite fallback as part of a broader resilience plan: separate authentication, tested failover, monitoring for signal degradation, and clear procedures for restoring normal routing without exposing the backup path to the same failure.