Export the current IPv4 ruleset
Build a paste-ready command, then review its compatibility and effects before running it.
read-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementsiptables-saveiptables-save must be installed and available on PATH.
Version supportiptables-save Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signals*filterRepresentative successful output; values vary with the selected target and system state.
Known errorsiptables-save: command not foundiptables-save is missing or is not available on PATH.
Verifyiptables-saveThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01iptables-saveCommandRuns the iptables-save stage of this one-liner.
Example input
iptables-save
Example output
*filter
:INPUT DROP [14:840]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [512:44820]
-A INPUT -i lo -j ACCEPT
COMMIT
Illustrative output — exact values vary by system and data.
Official sources