On Thursday, Syria severed all Internet connections to the outside world for a total of 40 minutes. The outage wasn't anywhere as significant as when Egypt and Libya flipped their respective switches, but it showed the country's government is testing how it can flex its censorship muscles if need be.
Again, it's not clear if President Bashar al-Assad's administration is planning a complete Internet outage, but it would appear that is being considered. Either way, all 61 Internet networks routed though Syria's state telecoms organisation, Syrian Telecommunications Establishment (STE) were withdrawn from the global routing table, according to Internet monitoring firm Renesys:
Typically, there are 66 routed Syrian prefixes (networks) and 61 of these go though the incumbent, STE. All of these networks were unavailable from 13:32 UTC to 14:12 UTC, or 4:32 to 5:12PM local time. However, five routed Syrian networks were not impacted by this incident.
While these five prefixes are registered to STE and geolocate to the country, they are originated directly by global provider Tata (AS6453), ranked as the eighth largest Internet provider globally and third in the Middle East according to Renesys' Market Intelligence. Interestingly enough, among the websites hosted in these networks is one providing a fake Skype encryption tool (EFF), purportedly targeting Syrian opposition activists.
Until this outage, Syria's Internet connectivity was considered relatively secure. It was believed al-Assad's administration knows the value of the Internet (at least for its own purposes) and thus decided not to follow in Egypt's and Libya's footsteps. Let's hope they're not having second thoughts.
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