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18 Cards in this Set
- Front
- Back
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[Short Option] Specifies the table to be operated upon. For firewalls, this will most often be filter, which is the default. For NAT configurations, the table name is nat.
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-t <table>
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[Short Option] Displays the current configuration for the specified chain or for all chains if chain is omitted.
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-L <chain>
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[Short Option] Displays the rules in the current chain or for all chains if chain is omitted. Produces more terse output than -L.
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-S <chain>
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[Short Option] Removes all rules for the specified chain or for all chains if chain is omitted.
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-F <chain>
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[Short Option] Sets the default policy (described in detail in “Setting the Default Policy”) for the specified chain.
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-P <chain> <target>
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[Short Option] Adds a new rule to the specified chain.
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-A <chain> <rule>
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[Short Option] Deletes an existing rule from a chain. The rule may be specified either as a number or as a description.
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-D <chain> <rule>
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[Short Option] Inserts a new rule into a chain at the specified position (number). If number is omitted, the rule is inserted at the head of the chain.
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-I <chain> <number> <rule>
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[Short Option] Replaces an existing rule (specified by number) with a new one.
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-R <chain> <number> <rule>
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[Long Option] Specifies the table to be operated upon. For firewalls, this will most often be filter, which is the default. For NAT configurations, the table name is nat.
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--table <table>
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[Long Option] Displays the current configuration for the specified chain or for all chains if chain is omitted.
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--list <chain>
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[Long Option] Displays the rules in the current chain or for all chains if chain is omitted. Produces more terse output than -L.
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--list-rules <chain>
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[Long Option] Removes all rules for the specified chain or for all chains if chain is omitted.
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--flush <chain>
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[Long Option] Sets the default policy (described in detail in “Setting the Default Policy”) for the specified chain.
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--policy <chain> <target>
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[Long Option] Adds a new rule to the specified chain.
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--append <chain> <rule>
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[Long Option] Deletes an existing rule from a chain. The rule may be specified either as a number or as a description.
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--delete <chain> <rule>
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[Long Option] Inserts a new rule into a chain at the specified position (number). If number is omitted, the rule is inserted at the head of the chain.
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--insert <chain> <number> <rule>
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[Long Option] Replaces an existing rule (specified by number) with a new one.
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--replace <chain> <number> <rule>
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