Hi,
Problem solved…..
Shame on me...
Deleted and recreated all load balancing pools & rules. Good occasion to clean up things. working fine now.
For the arp story, it was clearly a nonsense from me. The network range from the modem is set to 192.168.10.X after my lan 192.168.5.X... The arp tool scan/sort results ip by range, ascending...
I saw all my wans and then my lan machines so I stopped... So stupid (and impatient) I am.
Good lesson for the future, be patient and think few seconds.
Sorry for disturbing you and thx again for your answers.