Change ip of a node in multiserver setup

I've a multiserver setup with 3 node

node1 = main node with ispconfig interface
node2 = node with primary dns
node3 = node with secondary dns

Now i've to change the ip addrress of node3.

I think i've to follow this steps

1. adjust the /etc/hosts to reflect the new ip address
2. on node1 i've to change the permission of the mysql in something like

Code:

CREATE USER 'root'@'1.2.3.5' IDENTIFIED BY 'yourrootsqlpassword';
GRANT ALL PRIVILEGES ON * . * TO 'root'@'1.2.3.5' IDENTIFIED BY 'yourrootsqlpassword' WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;

I need to do other changes?