Just some random stuff, not a real configuration

firewall.cfg3b3837=redirect
firewall.cfg3b3837.dest=dmz_pub
firewall.cfg3b3837.dest_ip=172.16.10.20
firewall.cfg3b3837.dest_port=22
firewall.cfg3b3837.enabled=1
firewall.cfg3b3837.name=test1
firewall.cfg3b3837.proto=tcp
firewall.cfg3b3837.src=wan
firewall.cfg3b3837.src_dport=2222
firewall.cfg3b3837.target=DNAT

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firewall.@redirect[0]=redirect
firewall.@redirect[0].enabled='1'
firewall.@redirect[0].target='DNAT'
firewall.@redirect[0].src='wan'
firewall.@redirect[0].dest='dmz_pub'
firewall.@redirect[0].proto='tcp'
firewall.@redirect[0].src_dport='2222'
firewall.@redirect[0].dest_ip='172.16.10.20'
firewall.@redirect[0].dest_port='22'
firewall.@redirect[0].name='test1'

--------------------------------------------------------------

config redirect
        option target 'DNAT'
        option src 'wan'
        option dest 'dmz_pub'
        option proto 'tcp'
        option src_dport '2222'
        option dest_ip '172.16.10.20'
        option dest_port '22'
        option name 'test1'