xtables-translate

IPTABLES-TRANSLATE(8)       System Manager's Manual      IPTABLES-TRANSLATE(8)

NAME
       iptables-translate  --  translation  tool  to  migrate from iptables to
       nftables

       ip6tables-translate -- translation tool to migrate  from  ip6tables  to
       nftables

DESCRIPTION
       There  is  a  set of tools to help the system administrator translate a
       given ruleset from iptables(8) and ip6tables(8) to nftables(8).

       The available commands are:

       o iptables-translate

       o iptables-restore-translate

       o ip6tables-translate

       o ip6tables-restore-translate

USAGE
       They take as input the  original  iptables(8)/ip6tables(8)  syntax  and
       output the native nftables(8) syntax.

       The  iptables-restore-translate tool reads a ruleset in the syntax pro-
       duced by iptables-save(8).  Likewise,  the  ip6tables-restore-translate
       tool reads one produced by ip6tables-save(8).  No ruleset modifications
       occur, these tools are text converters only.

       The iptables-translate reads a command line as if  it  was  entered  to
       iptables(8),  and ip6tables-translate reads a command like as if it was
       entered to ip6tables(8).

EXAMPLES
       Basic operation examples.

       Single command translation:

       root@machine:~# iptables-translate -A INPUT -p tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
       nft add rule ip filter INPUT tcp dport 22 ct state new counter accept

       root@machine:~# ip6tables-translate -A FORWARD -i eth0 -o eth3 -p udp -m multiport --dports 111,222 -j ACCEPT
       nft add rule ip6 filter FORWARD iifname eth0 oifname eth3 meta l4proto udp udp dport { 111,222} counter accept

       Whole ruleset translation:

       root@machine:~# iptables-save > save.txt
       root@machine:~# cat save.txt
       # Generated by iptables-save v1.6.0 on Sat Dec 24 14:26:40 2016
       *filter
       :INPUT ACCEPT [5166:1752111]
       :FORWARD ACCEPT [0:0]
       :OUTPUT ACCEPT [5058:628693]
       -A FORWARD -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
       COMMIT
       # Completed on Sat Dec 24 14:26:40 2016

       root@machine:~# iptables-restore-translate -f save.txt
       # Translated by iptables-restore-translate v1.6.0 on Sat Dec 24 14:26:59 2016
       add table ip filter
       add chain ip filter INPUT { type filter hook input priority 0; }
       add chain ip filter FORWARD { type filter hook forward priority 0; }
       add chain ip filter OUTPUT { type filter hook output priority 0; }
       add rule ip filter FORWARD tcp dport 22 ct state new counter accept

       root@machine:~# iptables-restore-translate -f save.txt > ruleset.nft
       root@machine:~# nft -f ruleset.nft
       root@machine:~# nft list ruleset
       table ip filter {
            chain INPUT {
                 type filter hook input priority 0; policy accept;
            }

            chain FORWARD {
                 type filter hook forward priority 0; policy accept;
                 tcp dport ssh ct state new counter packets 0 bytes 0 accept
            }

            chain OUTPUT {
                 type filter hook output priority 0; policy accept;
            }
       }

LIMITATIONS
       Some (few) extensions may be not  supported  (or  fully-supported)  for
       whatever  reason  (for  example,  they  were considered obsolete, or we
       didn't have the time to work on them).

       There are no translations available for ebtables(8) and arptables(8).

       To  get   up-to-date   information   about   this,   please   head   to
       https://wiki.nftables.org/.

SEE ALSO
       nft(8), iptables(8)

AUTHORS
       The   nftables   framework   is   written   by  the  Netfilter  project
       (https://www.netfilter.org).

       This manual page was written by Arturo Borrero Gonzalez <arturo@netfil-
       ter.org>.

       This documentation is free/libre under the terms of the GPLv2+.

                                 May 14, 2019            IPTABLES-TRANSLATE(8)