SYN_RECV的奇怪連線
tcp6 0 0 120.115.2.158:80 45.56.69.15:35842 SYN_RECV -
tcp6 0 0 120.115.2.158:80 45.56.69.15:49813 SYN_RECV -
tcp6 0 0 120.115.2.158:80 149.255.109.168:44657 SYN_RECV -
tcp6 0 0 120.115.2.158:80 149.248.55.130:14794 SYN_RECV -
tcp6 0 0 120.115.2.158:80 149.248.55.130:18994 SYN_RECV - 最簡易處理方式
cat /proc/sys/net/ipv4/tcp_max_syn_backlog
256
firewall處理並log:

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