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
