Indonesia Hijacks the World

Yesterday, Indosat, one of Indonesia’s largest telecommunications providers, leaked large portions of the global routing table multiple times over a two-hour period. This means that, in effect, Indosat claimed that it “owned” many of the world’s networks. Once someone makes such an assertion, typically via an honest mistake in their routing policy, the only question […]

The New Threat: Targeted Internet Traffic Misdirection

Traffic interception has certainly been a hot topic in 2013. The world has been focused on interception carried out the old fashioned way, by getting into the right buildings and listening to the right cables. But there’s actually been a significant uptick this year in a completely different kind of attack, one that can be […]

Why Internet Paths Matter: Performance

Remember the Information Superhighway? It’s what some folks used to call the Internet back in the 1990s. Those of us lucky enough to have access from home were using dial-up modems that were over 1,000 times slower than the cable modem I’m using right now. Nothing very Super about that and the Internet has never […]

Cyber Escalation in Korea?

On Friday, we published a blog confirming a disruption in Internet connectivity affecting the Internet of North Korea.

This morning, South Korean authorities reported that they have been the victims of a cyber attack which impacted TV News organizations as well as banking institutions.

Renesys can confirm that at least some of today’s incidents escalated to the point of global visibility, as both South and North Koreans networks experienced actual disconnections. We note similarly timed outages affecting South Korea’s largest natural gas company.


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North Korea Suffers Outage

Earlier this morning,
North Korea accused the United States of conducting a cyber attack that disrupted their Internet connectivity. While the details remain unknown, we can confirm that, in the last two days, North Korea’s sole Internet provider has had ongoing problems staying connected to the global Internet. We’ll summarize some of our evidence in this blog entry.

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Cyber Attack in Palestine?

We can confirm reports of significant but sporadic Internet outages in the Palestinian Territories today.  As many as half of the routed networks of the Palestinian Territories were unreachable (withdrawn from the global routing table), possibly as a result of reported cyber attacks.  These outages are the largest we have observed all year for this country, which normally has a fairly stable Internet.  Impacted networks are located in both the West Bank and Gaza Strip.



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Irene Wallops US Internet

Hurricane Irene knocked out power to millions of homes and businesses as it travelled up the US East Coast this weekend. Even as the winds subsided, torrential rains triggered savage flooding throughout Eastern New York state and Vermont, tearing up roads and exposing the telecommunications infrastructure to further risks. The storm’s impacts were clearly visible in the Internet’s global routing table, as tens of thousands of networks were cut off from the rest of the world.
Here are a couple screenshots from our Internet Health Portal, which we provide to the US Computer Emergency Readiness Team (US-CERT). During an emergency like Hurricane Irene, this tool provides the US-CERT with critical information about the availability of Internet services across America. Working from lists of impacted customers in each state and county, and lists of correlated outage events, we can supply a lot of useful information about the problems being experienced by enterprises in the affected area. That information can be passed along to state and local governments to aid in prioritization of disaster relief.

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Tracing the Syrian Blackout

Updated Monday morning to include detailed Syrian network map, and include one-second BGP plots during the day of outage. –jim Thanks to everyone who’s stopped by this week to read about the Internet blackout that affected Syria last Friday. We’re always glad to hear your comments, especially when you fill in some of the missing […]

Libyan Disconnect

Final updates on this thread added at the bottom. New analysis here. –jim

Renesys confirms that the 13 globally routed Libyan network prefixes were withdrawn at 23:18 GMT (Friday night, 1:18am Saturday local time), and Libya is off the Internet. One Libyan route originated by Telecom Italia directly is still BGP-reachable, but inbound traceroutes appear to die in Palermo. A minority of our peers report some surviving paths through the peering connection between Level3 and Telecom Italia, but traceroutes into those prefixes fail, suggesting that the Libyan cutoff is complete.

We wondered whether anyone would repeat Egypt’s strategy. Tonight, it appears that we have our answer.

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Egypt Returns To The Internet

Latest updates on Wednesday’s restoration of Internet service in Egypt can be found at the bottom of this page. We’ll update through the day. cheers, –jim


Egyptian Internet providers returned to the Internet at 09:29:31 UTC (11:29am Cairo time). Websites such as the Egyptian Stock Exchange, Commercial International Bank of Egypt, MCDR, and the US Embassy in Cairo, are once again reachable.

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