“Sabotage”: several severed cables at the root of a major internet outage in France
L’Obs/Toms Guide, April 27, 2022 (excerpts)
This Wednesday morning, April 27, many French people are complaining of difficulties to connect. And for good reason: incidents are multiplying in France, following a major sabotage. An official state source confirmed to “L’Obs” that this was a “coordinated act of malice”, particularly “serious” and “very rare”. According to AFP, several French cities have experienced Internet connection cuts during the night after cables were cut. Paris, Lyon, Grenoble, Reims, Strasbourg and Lille were particularly affected.
A telecom engineer said that “around 3:20, 3:40 and 5:20, cables of several long-distance fiber networks have been partially cut.” These were cables “from Paris to Strasbourg, Lyon and Lille“. These “long-distance” fiber optic cables connect major French cities, particularly for infrastructure such as data centers. It is also through this network that fixed Internet access (ADSL and fiber) and certain telephone lines function.
The quasi-simultaneity of the outages last night (between 3:20 and 5:20) indeed seems suspicious, especially since it is not just “general public” connections that have been affected, but strategic underground long-distance links used for peering and IP transit, linking Lyon, Strasbourg, Caen, Lille, and Rennes to Paris, and on at least three locations, they were several hundred kilometers apart.
By domino effect, several local and (inter)national operators using these conduits or leasing bandwidth on these fiber links, such as Sparkle, Alphalink, euNetworks, Colt, F5, Zayo or Netalis, are affected by these events. At Netalis, the failure was confirmed this morning via a particularly transparent announcement, the operator adding that the Bourgogne-Franche-Comté region would have been for a moment totally isolated from the Internet. The major incident has in practice isolated varied transmission equipment from the Internet backbones of long distance transport operators.
It is important to understand that the locations of these cables are not very accessible. They are not cabinets that can be found in the street, but buried pipes [under covers, or along SNCF tracks, highways and VNF canals]. A source in the telecom industry tells us that the cut on the Paris-Lyon cable is located in the village of La Chapelle-la-Reine (Seine-et-Marne) and is due to “an act of vandalism”. “Le Parisien” reports that cables were cut in Fresnes-en-Woëvre (Meuse), Meaux and Souppes-sur-Loing (Seine-et-Marne), and Le Coudray-Montceaux (Essonne). Continue reading And one beautiful night, internet was cut in a good part of the country… →