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o que "!" significa na regra iptable

tag-icon • tag-icon linux networking bash firewall iptables
o que "!" significa na regra iptable

o que "!" significa na seguinte regra iptable

iptables -I inacc ! -i br0 -p UDP --dport 69 -j ACCEPT

Acho que está relacionado à interface br0. Eu acho que isso significa qualquer interface, exceto obr0

Estou correcto?

Responder1

Sim você é. De "man iptables"

[!] -i, --in-interface name
          Name  of  an  interface  via  which  a packet was received (only for packets entering the INPUT, FORWARD and PREROUTING chains).  When the "!" argument is used before the interface name, the sense is inverted.  If the
          interface name ends in a "+", then any interface which begins with this name will match.  If this option is omitted, any interface name will match.

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