pve-docs/pve-firewall-host-opts.adoc

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`enable`: `<boolean>` ::
Enable host firewall rules.
`log_level_in`: `<alert | crit | debug | emerg | err | info | nolog | notice | warning>` ::
Log level for incoming traffic.
`log_level_out`: `<alert | crit | debug | emerg | err | info | nolog | notice | warning>` ::
Log level for outgoing traffic.
`log_nf_conntrack`: `<boolean>` ('default =' `0`)::
Enable logging of conntrack information.
`ndp`: `<boolean>` ('default =' `0`)::
Enable NDP (Neighbor Discovery Protocol).
`nf_conntrack_allow_invalid`: `<boolean>` ('default =' `0`)::
Allow invalid packets on connection tracking.
`nf_conntrack_helpers`: `<string>` ('default =' ``)::
Enable conntrack helpers for specific protocols. Supported protocols: amanda, ftp, irc, netbios-ns, pptp, sane, sip, snmp, tftp
`nf_conntrack_max`: `<integer> (32768 - N)` ('default =' `262144`)::
Maximum number of tracked connections.
`nf_conntrack_tcp_timeout_established`: `<integer> (7875 - N)` ('default =' `432000`)::
Conntrack established timeout.
`nf_conntrack_tcp_timeout_syn_recv`: `<integer> (30 - 60)` ('default =' `60`)::
Conntrack syn recv timeout.
`nosmurfs`: `<boolean>` ::
Enable SMURFS filter.
`protection_synflood`: `<boolean>` ('default =' `0`)::
Enable synflood protection
`protection_synflood_burst`: `<integer>` ('default =' `1000`)::
Synflood protection rate burst by ip src.
`protection_synflood_rate`: `<integer>` ('default =' `200`)::
Synflood protection rate syn/sec by ip src.
`smurf_log_level`: `<alert | crit | debug | emerg | err | info | nolog | notice | warning>` ::
Log level for SMURFS filter.
`tcp_flags_log_level`: `<alert | crit | debug | emerg | err | info | nolog | notice | warning>` ::
Log level for illegal tcp flags filter.
`tcpflags`: `<boolean>` ('default =' `0`)::
Filter illegal combinations of TCP flags.