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type: u32 help: TCP maximum retransmit attempts default: 3 val_help: u32:1-2147483647; Generic connection timeout in seconds syntax:expression: ($VAR(@) >= 1 && $VAR(@) <= 2147483647) ; "Value must be between 1 and 2147483647" update: sudo sysctl -q -w net/netfilter/nf_conntrack_tcp_max_retrans=$VAR(@) delete: sudo sysctl -q -w net/netfilter/nf_conntrack_tcp_max_retrans=3