installing conntrackd

install | setup | routing states

tested on slack150 and debian12

install

debian

the packages at hand

    apt install conntrack conntrackd

ls -lF /etc/conntrackd/primary-backup.sh # no exist
    ln -s /usr/share/doc/conntrackd/examples/sync/primary-backup.sh /etc/conntrackd/primary-backup.sh

you need to enable Netfilter connection tracker

    apt install nftables

and a few handy tools won’t hurt

    apt install netstat-nat tcpdump

slackware

    slackpkg install nftables
    slackpkg install libmnl
    slackpkg install libnfnetlink
    slackpkg install libnetfilter_conntrack
    slackpkg install conntrack-tools
#+tcpdump
ln -s /usr/doc/conntrack-tools-1.4.6/sync/primary-backup.sh /etc/conntrackd/primary-backup.sh
    sbopkg -i netstat-nat

from source

see conntrackd-source