So once more I changed ISP. Each time I do that the server gets really slow to ssh into, have not figured out yet why. But to speed up things a bit I’ll write down here which files I need to change.

First /etc/rc.conf which sets the IP
/etc/namedb/named.conf for the DNS
/etc/namedb/yelloworb.com
/etc/namedb/yelloworb.com.rev
/etc/ipfw.conf for the firewall
/etc/hosts

/usr/local/etc/dhcpd.conf
/usr/local/etc/proftpd.conf