VBoxManage modifyvm "xubuntu" --natpf1 "guest-redis,tcp,,6379,,6379"
VBoxManage modifyvm "xubuntu" --natpf1 "guest-mysql,tcp,,3306,,3306"
Another method is to create two adapters, NAT + Host Only.
ps. Delete the forwarding rules like:
VBoxManage modifyvm "xubuntu" --natpf1 delete "guest-redis"
refer to:
https://blog.csdn.net/chinainvent/article/details/6234368
https://superuser.com/questions/1282666/host-cant-connect-to-guest-with-nat-networking-at-virtualbox-but-others
https://forums.virtualbox.org/viewtopic.php?t=32014