If CPU-CA20(FIT)GY cannot be found by the fitutil command successfully with API-CAP(LNX), please try the following methods. 1: Set the Group ID of CPU-CA20(FIT)GY to 8. 2: Please connect as follows. [PC] -----(Ehternet) ---- [CPU-CAxx(FIT)GY] 3: If firewall is set, please ACCEPT port 20487. # iptables -A INPUT -p udp -sport 20487 -j ACCEPT Or stop it once. # /etc/init.d/iptables stop 4: After stop the firewall, add to the configuration file [ /etc/hosts ]. ----------------------------------------------------------- /etc/hosts ----------------------------------------------------------- 10.xxx.yyy.zzz (New Machine Name) ←Part to be added 127.0.0.1 localdomein.localName local --------------------------------------------------------------- * For [New Machine Name], please give the name of your PC. 5: Set the IP address of the network adapter, etc. (Example 1) For RedHat Enterprise Linux 8.0 Add to the configuration file [ /etc/sysconfig/network-scripts/ifcfg-enp*s* ]. --------------------------------------------------------------- /etc/sysconfig/network-scripts/ifcfg-enp*s* --------------------------------------------------------------- DEVICE=enp*s* #BOOTPROTO=dhcp ←Comment out because it is not acquired by DHCP BOOTPROTO=static ←Part to be added IPADDR=10.xxx.yyy.zzz ←Part to be added NETMASK=255.0.0.0 ←Part to be added NETWORK=10.0.0.0 ←Part to be added BRORDCAST=10.255.255.255 ←Part to be added ONBOOT=yes ---------------------------------------------------------------- * The * part depends on your environment. In RedHat Enterprise Linux 8.0, it will be [ /etc/hosts ] or [ /etc/sysconfig/network-scripts/ifcfg-enp*s* ]. For other distributions, the file name and folder may be different. (Example 2) For Ubuntu 14.04 Stop NetworkManager. --------------------------------------------------------------- $ sudo stop network-manager --------------------------------------------------------------- Add to the configuration file [ /etc/NetworkManager/system-connections/(connect name) ]. (connect name is the connection name to use) --------------------------------------------------------------- /etc/NetworkManger/system-connections/(connect name) --------------------------------------------------------------- [802-3-ethernet] : : : [ipv4] method=manual ←Part to be added address1=10.xxx.yyy.zzz/8 ←Part to be added ---------------------------------------------------------------- Start NetworkManger. --------------------------------------------------------------- $ sudo start network-manager --------------------------------------------------------------- 6: After setting, restart the daemon in the network part, and then start fitutil again. #/etc/init.d/network restart For the time being, get here. If fitutil does not start here, please check if multicast is set and if multicast routing is set. 7: Setting enp*s* (enp*s* is the alias name of the network device. Depending on the environment, it may be named as eth0 or eth1.) Execute [#ifconfig -a enp*s*] check if MULTICAST is displayed. If multicast was not set, execute [#ifconfig enp*s* enable multicast] etc. to enable multicast. 8: Setting route Make sure that the routing table for multicast is set. If it is not set, please set a new one. [#ip route add 224.0.0.0/4 dev enp*s*] After setting, please use fitutil again.