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spf2cidr was inspired by a shell script called 'getwhite' provided by WEiRDJE on mindcry/#openbsd irc.

One might add something similar to this in /etc/daily.local on OpenBSD:

cd /etc/mail && {
        ./spf2cidr -o whitelist=nl > .whitelist.spf2cidr
        {
                cat whitelist.top
                grep "^#" .whitelist.spf2cidr
                grep -v "^#" .whitelist.spf2cidr | sort +2
        } > .whitelist.txt
        if [ $? -eq 0 ]; then
                [ -s .whitelist.txt ] && cmp -s .whitelist.txt whitelist.txt || {
                        mv .whitelist.txt whitelist.txt
                        pfctl -f /etc/pf.conf
                }
        fi
}

I always am interested in feedback and especially suggestions or tweaks in the form of 'diff -u'. Please contact todd@fries.net if you have any of the above.

Prereq:

  Net::DNS

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Input domains output cidr from spf dns records for whitelisting purposes

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