Syria Experiences Multi-Day Connectivity Disruption

Syria experienced a significant, multi-day degradation in internet connectivity beginning on July 26. The disruption, which lasted for approximately 3.7 days, was characterized by a severe drop in Border Gateway Protocol (BGP) visibility and reduced network reachability across the country.

Technical Details

The overall severity of the event was measured at 7,770,920. The disruption began at 08:10 UTC on July 26 and continued until 00:30 UTC on July 30. A primary impact was observed on the BGP control plane, with a severity score of 9,570. BGP is responsible for exchanging routing information between networks, and a drop in this signal indicates a loss of visibility for Syrian network prefixes on the global internet.

Concurrently, active probing of IPv4 address blocks showed a degradation in reachability. The ping-slash24 signal, which measures ICMP reachability across /24 network prefixes, recorded a severity score of 812 during a more acute period between 18:10 and 18:50 UTC on July 29. This signal dropped by 19% from its peak, indicating a period of reduced connectivity for end-users. The cause has not been publicly attributed.

Connectivity was reported restored by the end of the observation window.