- Plesk for Linux
Internet connection goes down when Plesk server is booted.
Server receives a lot of packets to UDP port 11211.
Server is under Memcrashed DDoS amplification attack.
Appy one of the following solutions (or both):
1. Block TCP and UDP connections to port 11211 with firewall:
For example use the following SSH command for iptables:
# iptables -A INPUT -p tcp --dport 11211
# iptables -A INPUT -p udp --dport 11211