Tuesday 18th April 2023

Internet access - ADSL / VDSL [SEWAN] Unexpected disturbances - 18.04.2023 (UPDATE)

Beginning: 18.04.2023– 08.30 AM Ending: 18.04.2023– 10.50 AM

Impact: some internet line are down

 

Dear customer, dear partner,

We experienced partial disturbances on xDSL and FTTH internet access links.

An overly restrictive security configuration in this infrastructure in some cases prevented recursive DNS servers from communicating with certain authoritative DNS servers to renew zone information after cache expiration. This created domain name resolution errors for CPEs trying to resolve the nomad.sewan.be record, which is needed to connect the L2TP tunnels of Draytek and Mikrotik CPEs.

After changing security level on the recursive DNS server, the CPEs were able to resolve the L2TP endpoint again and reconnect.

Sorry for the inconvenience this may have caused.

Best regards;

SEWAN technical team