Make sure the two(or more) hosts under the same network segment of the local area network, Like `192.168.10.6` and `192.168.10.7`.
You just need to modify `CYBER_IP` of `/apollo/cyber/setup.bash`
```bash
export CYBER_IP=127.0.0.1
```
Suppose you have two hosts A and B,the ip of A is `192.168.10.6`, and the ip of B is `192.168.10.7`. Then set `CYBER_IP` to `192.168.10.6` on host A, and set `CYBER_IP` to `192.168.10.7` on host B. Now host A can communicate with host B.