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The internet depends on networks trusting routing information exchanged through the Border Gateway Protocol. When incorrect or malicious routes are announced, traffic can be redirected, intercepted, or disrupted, making BGP hijacking a serious concern for organizations that depend on reliable internet connectivity.
Effective BGP hijacking prevention combines route authorization, filtering, routing security practices, continuous monitoring, and coordinated response to reduce the risk that unauthorized route announcements affect critical services.
Why BGP Is Vulnerable to Route Hijacking
Border Gateway Protocol, or BGP, allows autonomous systems to exchange information about which IP address prefixes they can reach. This routing information helps networks determine how internet traffic should travel between different providers and destinations.
Routing problems can occur when networks accept incorrect announcements involving:
- IP prefixes announced by an unauthorized network
- More-specific routes that attract existing traffic
- Incorrect or manipulated routing paths
- Configuration errors propagated between providers
Not every routing incident is malicious. Operational mistakes can also result in incorrect announcements, but the impact on traffic availability and routing integrity can still be significant.
How BGP Hijacking Affects Organizations
An unauthorized route can change where internet traffic travels even when the organization's servers, applications, and internal security controls continue operating normally. The consequences depend on the route, the networks that accept it, and what happens to the redirected traffic.
Traffic Disruption
An incorrect route may send traffic toward infrastructure that cannot deliver it to the intended destination. Users can experience outages, failed connections, degraded performance, or intermittent availability even though the targeted service itself remains operational.
This makes routing security an important part of resilience planning for organizations that depend heavily on public-facing applications and internet connectivity.
Traffic Redirection
Some routing incidents can redirect traffic through an unexpected network rather than simply making a destination unreachable. Depending on the circumstances and other protections in place, this can create additional confidentiality and integrity concerns.
Encryption remains important, but organizations should also monitor routing behavior instead of assuming application security alone protects the path traffic takes across the internet.
Core BGP Hijacking Prevention Practices
No single organization controls global internet routing, so BGP hijacking prevention requires both internal preparation and coordination with network providers and the broader routing ecosystem.
- Create and maintain accurate Route Origin Authorizations for prefixes the organization controls
- Work with network providers that support route filtering and Resource Public Key Infrastructure validation
- Maintain accurate prefix, autonomous system, and routing contact information
- Monitor externally visible route announcements for unexpected origin or path changes
- Document provider escalation procedures for responding quickly to unauthorized announcements
Organizations should regularly review routing configurations and authorization records when address space, providers, or network architecture changes so outdated information does not weaken otherwise effective controls.
Route Origin Validation can help networks determine whether the autonomous system originating a BGP announcement is authorized to announce that IP prefix based on published RPKI information.
Why Routing Monitoring Matters
Preventive controls can reduce routing risk, but organizations still need visibility into how their prefixes appear on the public internet. Unexpected origin autonomous systems, unusual path changes, newly announced more-specific prefixes, or sudden reachability problems can provide warning that a routing incident is underway.
Routing data should also be considered alongside broader security telemetry. Changes in network paths combined with unusual authentication, application, DNS, or infrastructure activity may provide important context during an investigation and help teams determine whether an event is an operational mistake or part of a larger security incident.
Would your team recognize when infrastructure anomalies coincide with suspicious security activity? BitLyft helps centralize and correlate security signals so analysts can investigate unusual behavior with broader context across the environment.
Request a DemoBuilding a BGP Incident Response Plan
Routing incidents often require coordination outside the organization, making preparation especially important. Response plans should identify owned prefixes and autonomous system information, network provider contacts, escalation procedures, internal responsibilities, communication processes, and the technical information teams will need when reporting an unauthorized route.
Organizations should periodically verify that these contacts and procedures remain current. Exercises can help networking and security teams understand their respective responsibilities, establish how routing alerts will be validated, and determine how affected customers and stakeholders will be informed if an incident disrupts critical services.
Conclusion
BGP is fundamental to internet connectivity, but misplaced trust in routing announcements can create availability and security risks. Effective BGP hijacking prevention combines RPKI-based route authorization, provider filtering, accurate routing records, external monitoring, and a response plan designed for rapid coordination when unexpected announcements appear.
Organizations seeking broader visibility across network and security activity can explore BitLyft SIEM to centralize security telemetry and provide analysts with greater context when investigating infrastructure anomalies.
Connect Network Anomalies With the Bigger Security Picture
Routing incidents can happen beyond the traditional security perimeter, but their effects can appear across applications, infrastructure, and user activity. BitLyft helps centralize security signals so analysts can investigate suspicious events with the context needed for faster response.
- Staffed 24/7 by U.S.-based Tier 3 analysts
- Always on. Always watching.
- Aligned to CMMC, NIST 800-171, and ISO 27001
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Download the guideFAQs
What is BGP hijacking?
BGP hijacking occurs when IP prefixes are announced through an unauthorized or incorrect autonomous system, causing some internet traffic to follow an unintended route. The event may result from malicious activity or routing misconfiguration.
How does RPKI help prevent BGP hijacking?
RPKI allows network operators to publish cryptographically verifiable information about which autonomous systems are authorized to originate specific IP prefixes. Networks performing Route Origin Validation can use this information when evaluating received route announcements.
Can an organization completely prevent BGP hijacking on its own?
No organization controls how every network on the internet handles BGP announcements. Organizations can reduce risk by maintaining accurate route authorizations, choosing providers with strong routing security practices, monitoring their prefixes, and preparing escalation procedures for routing incidents.