The graph below shows DNS traffic from and to Syria. The
drop in both inbound and outbound traffic from Syria is clearly visible.
The small amount of outbound traffic depicted by the chart indicates
our DNS servers trying to reach DNS servers in Syria.
Currently both TLD servers for Syria, ns1.tld.sy and
ns2.tld.sy are unreachable. The remaining two nameservers
sy.cctld.authdns.ripe.net. and pch.anycast.tld.sy. are reachable since
they are not within Syria.
Umbrella Security Labs, which is the threat research division of OpenDNS, also reported
on an Internet blackout in Syria November of 2012, where we shared
details of the top 10 most failed domains during the outage.
Update: 1:28 p.m. PDT
There have been numerous incidents where access to and from
the Internet in Syria was shut down. Shutting down Internet access to
and from Syria is achieved by withdrawing the BGP routes from Syrian
prefixes. The graph below shows the sudden drop in visibility for Syrian
Protocol (BGP). BGP distributes routing information and makes sure all
routers on the Internet know how to get to a certain IP address. When an
IP range becomes unreachable it will be withdrawn from BGP, this
informs routers that the IP range is no longer reachable.
tables for Syria, while normally it’s close to Eighty.
routes that are still being announced by the major Syrian Telecom
communication with the rest of the world.
communication within Syria is still available. Although we can’t yet
comment on what caused this outage, past incidents were linked to both
government-ordered shutdowns and damage to the infrastructure, which
included fiber cuts and power outages.