RefBoxと通信できない

ros2-rcll_refbox_peer を動かしても，/rcll/game_state等を吐き出さない場合の話です．
firewallが悪さをしている可能性を疑ってみましょう．

ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
5901/tcp                   ALLOW       Anywhere                  
5902/tcp                   ALLOW       Anywhere                  
5900/tcp                   ALLOW       Anywhere                  
22/tcp                     ALLOW       Anywhere                  
5901/tcp (v6)              ALLOW       Anywhere (v6)             
5902/tcp (v6)              ALLOW       Anywhere (v6)             
5900/tcp (v6)              ALLOW       Anywhere (v6)             
22/tcp (v6)                ALLOW       Anywhere (v6)     

RefBox用のポート，4441から4447が閉じていますね…．

ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4444
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4445
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4446
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4447
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4441
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw allow 4442
Rule added
Rule added (v6)
ryukoku@ryukoku-NucBoxG5:~/ros2_ws$ sudo ufw reload
Firewall reloaded

これで，使えるようになります．