Past Incidents

Beginning: 22.01.2021 – 9.46 AM

Ending: 22.01.2021 – 2.35 PM

Impacts: Outbound mobile calls partially unreachable

Dear customer, dear partner,

Please note that today one of our upstream mobile carrier was, without any valid reason, blocking a significant part of our outbound Belgium mobile traffic. As we have in place multiple failover scenery, most of the calls blocked were mitigated toward other carriers.

Nevertheless, part of the traffic sent to the faulty upstream carrier was sending back to us an incoherent error code (403. Forbidden) which we (as all other telecom carriers) consider a user based return code (meaning a code stating that the recipient of the call does not want to accept it).

Therefore, this wrongly given code made our system consider as a normal behave and, therefore, did not trigger failover routings.

When we discovered this double fault, we temporarily adapted our routing, and raised an emergency case toward the upstream carrier for investigation.

Best regards; SEWAN Technical Team

Beginning: 21.01.2021 – 11.05 AM

Ending: 21.01.2021 – 11.46 AM

Impacts: External backbone network supplier DDOSed

Dear customer, dear partner,

Please note that since 16/01/2021, one of our backbone network supplier is experiencing DDOS attacks. Until this morning, all our failover systems have been able to mitigate their problems in order to not impact our services in any kind;

Nevertheless, since this morning 11.05AM, we have noticed that the attacks they are suffering were so intense that we experienced cascaded disturbances, mainly impacting outbound calls.

At 11.46AM, we could get a technical confirmation that the DDOS attacks were mitigated by our supplier. The situation is back to normal, and we are closely monitoring their activities in order to activate backup procedures if this happens again.

Best regards;

SEWAN Technical Team

***** UPDATE - 13.01.2021 - 9.25PM *****

At 9.25PM today, Telenet confirmed the situation was resolved.

Beginning: 13.01.2021 – 10.00 AM

Ending: on going

Impact: Telenet fiber down

Dear customer, dear partner,

Please note that since 10AM this morning, we have noticed partial disturbances on Telenet internet lines on some areas of Brussels.

Therefore, if you or your customer(s) experience internet/telephony issues, this may be the root cause.

At this moment, we have not received any official information that their problem is fixed.

SEWAN Technical Team