If you use DHCP, you can add the following to your dhcpd.conf file:
option option-143 code 143 = string; # (only for ISC's dhcpd v3) option option-143 "9000";Then restart your DHCP daemon. This is usually either
/etc/init.d/dhcp restart or /etc/init.d/dhcpd restart
If you use the installation parameter approach you can add the following to /etc/systemimager/pxelinux.cfg/syslinux.cfg (and re-run si_mkclientnetboot) or using the --append "STRING" option with si_mkautoinstalldisk or si_mkautoinstallcd:
FLAMETHROWER_DIRECTORY_PORTBASE=9000