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63 lines
2.1 KiB
Markdown
63 lines
2.1 KiB
Markdown
ferm - for Easy Rule Making
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===========================
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[`ferm`][1] is a frontend for iptables, providing a way to write manageable
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rulesets without sacrificing flexibility.
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## Tutorial
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```
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$ alias ferm='docker run -i --rm vimagick/ferm'
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$ cat > iptables.rules <<_EOF_
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chain INPUT {
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policy DROP;
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mod state state (RELATED ESTABLISHED) ACCEPT;
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proto tcp dport (http ftp ssh) ACCEPT;
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}
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_EOF_
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$ ferm -h
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Usage:
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ferm *options* *inputfiles*
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Options:
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-n, --noexec Do not execute the rules, just simulate
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-F, --flush Flush all netfilter tables managed by ferm
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-l, --lines Show all rules that were created
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-i, --interactive Interactive mode: revert if user does not confirm
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-t, --timeout s Define interactive mode timeout in seconds
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--remote Remote mode; ignore host specific configuration.
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This implies --noexec and --lines.
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-V, --version Show current version number
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-h, --help Look at this text
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--slow Slow mode, do not use iptables-restore
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--shell Generate a shell script which calls iptables-restore
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--domain {ip|ip6} Handle only the specified domain
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--def '$name=v' Override a variable
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$ ferm < iptables.rules
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# Generated by ferm 2.2 on Mon Jul 6 00:32:04 2015
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*filter
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:INPUT DROP [0:0]
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-A INPUT --match state --state RELATED,ESTABLISHED --jump ACCEPT
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-A INPUT --protocol tcp --dport http --jump ACCEPT
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-A INPUT --protocol tcp --dport ftp --jump ACCEPT
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-A INPUT --protocol tcp --dport ssh --jump ACCEPT
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COMMIT
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$ ferm --slow - < iptables.rules
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iptables -t filter -P INPUT ACCEPT
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iptables -t filter -F
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iptables -t filter -X
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iptables -t filter -P INPUT DROP
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iptables -t filter -A INPUT --match state --state RELATED,ESTABLISHED --jump ACCEPT
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iptables -t filter -A INPUT --protocol tcp --dport http --jump ACCEPT
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iptables -t filter -A INPUT --protocol tcp --dport ftp --jump ACCEPT
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iptables -t filter -A INPUT --protocol tcp --dport ssh --jump ACCEPT
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```
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[1]: http://ferm.foo-projects.org/
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