There are some possibilities:
- Your colleague made a mistake entering the command..
- You didn't give the colleague the right command... 192.168.168.x doesn't look very right.
- rl0 isn't the correct interface..
We honestly can't diagnose problems like this... have you ever played that game where people pass the phrase? eventually it becomes scrambled/unintelligible.
Instead of changing the IP address of the interface, why don't you ask your colleague to determine the *new* IP assigned by DHCP. (
If it's a server, it shouldn't be dynamic...).
Now, I assume you're on the same LAN as this system.. why can't you physically go check the state of the machine? or are you attempting to access a machine over the internet via a private IP?