pf

pfctl

pfctl -nf /etc/pf.conf

... check for syntax errors only

pfctl -s rules

... show the current rules

pfctl -t abusers -T show

... show the entries of the table abusers

pfctl -t abusers -T flush

... remove all the entries of the table abusers

pfctl -t abusers -T delete 88.77.66.55

... remove the entry 88.77.66.55 from the table abusers

pfctl -t ssh_abusers -T show | tr -d " " > pf_dump.txt

... dump the contents of the ssh_abusers table into the pf_dump.txt file

for i in 'cat pf_dump.txt'; do pfctl -t ssh_abusers -T add $i; done

... restore the table dump into the ssh_abusers table