"do not delete" not obeyed when new rules manually added

[aww+]

I had a maxed out csf.deny

if I then do

csf -d 1.2.3.4/24

it will happily remove "do not delete" lines

there were clearly other lines available to delete in the csf.deny

mostly auto NETBLOCK and PERMBLOCK, but they were left untouched

[ForumAdmin]

I am unable to recreate this as a problem. I can only suggest that you check that you only have single spaces between "do not delete" and that the tag is on the same line as the IP address following the required # symbol. Other than that, you can easily preserve denies by using an Include file instead.