The simple step for use opengnb systemd: In machine A: 1. cd /etc/opengnb/default/security gnb_crypto -c -p 1001.private -k 1001.public 2. cp 1001.public ../ed25519/ 3. scp 1001.public B:/etc/opengnb/default/ed25519/ In machine B: 1. cd /etc/opengnb/default/security gnb_crypto -c -p 1002.private -k 1002.public 2. cp 1002.public ../ed25519/ 3. scp 1002.public A:/etc/opengnb/default/ed25519/ 4. update /etc/opengnb/default/node.conf, set nodeid=1002 At last run in machine A and machine B: systemctl restart opengnb enjoy!