Lebanon has two types of businesses: those that have experienced a total internet outage and those that will. A single ISP connection, whether through Ogero or one of the licensed private operators, is not a redundancy strategy. It is a single point of failure.

What dual-ISP failover actually means

Dual-ISP failover means your network maintains two active connections to different internet service providers. When one fails, traffic switches to the other automatically. Done correctly, the switchover happens in under 30 seconds. Done incorrectly, it requires someone to manually reconfigure routes while your team sits idle.

There are two ways to implement this:

  • Active-passive: One ISP carries all traffic. The second sits idle and activates only when the primary drops. Simpler to configure, slightly slower failover.
  • Active-active with load balancing: Both ISPs carry traffic simultaneously. You get redundancy and better throughput. Requires a more capable firewall and careful routing policy.

Why Lebanon specifically makes this non-negotiable

Most countries treat ISP outages as rare events. In Lebanon, they are scheduled. Ogero line quality degrades during peak hours in certain regions. Private ISPs experience their own congestion and infrastructure issues. Power cuts affect ISP nodes directly. If your office is on a single connection and that node goes down, you have no recourse.

The cost of four hours of downtime for a team of 20 people exceeds the annual cost of a second ISP connection. This is not a complex calculation.

What a correct implementation requires

You need three things: a firewall that supports dual-WAN with policy-based routing, two physically separate ISP connections, and correct configuration of failover detection.

The detection piece is where most deployments fail. If your firewall checks gateway availability by pinging the ISP's own router, it will miss outages where the router is up but upstream is unreachable. You need DNS or HTTP probes to external endpoints. We configure probes to multiple targets so a single failed probe does not trigger a false failover.

What to watch for after deployment

Asymmetric routing is the most common issue post-deployment. If your outbound traffic leaves on ISP A but the response comes back through ISP B, stateful firewall inspection drops the packet. Proper NAT and routing policy configuration prevents this. Test both paths independently before declaring the system live.

Also: make sure your DNS TTLs are low enough that clients can reach you during a failover if you are hosting anything internally. A TTL of 3600 means 60 minutes of potential disruption even after your network is back.

The bottom line

Dual-ISP failover is not a luxury feature. In Lebanon's infrastructure environment, it is the minimum viable connectivity standard for any business that cannot afford downtime. The hardware cost is marginal. The configuration complexity is manageable. The alternative is waiting for the next outage and counting the cost after.