Syria Experiences BGP Disruption Lasting Over Four Hours

Syria experienced a notable disruption to its internet control plane on August 10 and 11, lasting over four hours. The event primarily affected the Border Gateway Protocol (BGP), which governs the exchange of routing information between networks.

Technical Details

The disruption occurred in two distinct periods. The first began at 20:20 UTC on August 10 and lasted until 23:10 UTC, registering a severity score of 177. A second, shorter period followed from 23:35 UTC until 00:30 UTC on August 11, with a severity score of 122. The BGP signal, which measures the control plane visibility for network prefixes, recorded an overall severity score of 299 for the event.

Other network signals showed varying levels of impact. The ping-slash24 signal, which measures ICMP reachability across IPv4 /24 prefixes, recorded a 9% drop from its peak. The gtr-norm signal, a forecast deviation from an expected traffic baseline, showed a more significant 47% drop from its peak.

Reported Cause

The cause of the disruption has not been publicly attributed.

Network connectivity was reported restored by 00:30 UTC on August 11.