man 8 iptables-save

IPTABLES-SAVE(8)                iptables 1.8.10               IPTABLES-SAVE(8)

NAME
       iptables-save -- dump iptables rules

       ip6tables-save -- dump iptables rules

SYNOPSIS
       iptables-save [-M modprobe] [-c] [-t table] [-f filename]

       ip6tables-save [-M modprobe] [-c] [-t table] [-f filename]

DESCRIPTION
       These  tools are deprecated in Red Hat Enterprise Linux. They are main-
       tenance only and will not receive new features. New setups  should  use
       nft(8).   Existing  setups  should migrate to nft(8) when possible. See
       <https://red.ht/nft_your_tables> for details.

       iptables-save and ip6tables-save are used to dump the contents of IP or
       IPv6  Table  in easily parseable format either to STDOUT or to a speci-
       fied file.

       -M, --modprobe modprobe
              Specify the path to the modprobe(8) program. By  default,  ipta-
              bles-save  will  inspect  /proc/sys/kernel/modprobe to determine
              the executable's path.

       -f, --file filename
              Specify a filename to log the output to. If not specified, ipta-
              bles-save will log to STDOUT.

       -c, --counters
              Include  the  current  values of all packet and byte counters in
              the output.

       -t, --table tablename
              Restrict output to only one table. If the kernel  is  configured
              with  automatic  module loading, an attempt will be made to load
              the appropriate module for that  table  if  it  is  not  already
              there.
              If  not specified, output includes all available tables. No mod-
              ule loading takes place, so in order to include a specific table
              in  the  output,  the  respective  module  (something  like ipt-
              able_mangle or ip6table_raw) must be loaded first.

BUGS
       None known as of iptables-1.2.1 release

AUTHORS
       Harald Welte <laforge@gnumonks.org> 
       Rusty Russell <rusty@rustcorp.com.au> 
       Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save.

SEE ALSO
       iptables-apply(8), iptables-restore(8), iptables(8), nft(8)

       The iptables-HOWTO, which details more iptables usage,  the  NAT-HOWTO,
       which  details  NAT,  and the netfilter-hacking-HOWTO which details the
       internals.

iptables 1.8.10                                               IPTABLES-SAVE(8)