Networking : MacBookPro don't see NAS while other PC do

Hi all;

Get an issue connecting my MacBook to my own NAS.

Get also 2 windows 7 and Windows 10 pc, they don't have any pb to get access to this NAS.

PC do ping NAS, MacBook don't.

PING 192.168.1.21 (192.168.1.21): 56 data bytes

Request timeout for icmp_seq 0

Request timeout for icmp_seq 1

Request timeout for icmp_seq 2

Firewall is off, but localhost port scan see only port 631 :

Port Scan a démarré…

Port Scanning host: 127.0.0.1

Open TCP Port: 631 ipp

Port Scan a terminé…

Internet is working fine :

Active Internet connections (including servers)

Proto Recv-Q Send-Q Local Address Foreign Address (state)

tcp4 0 0 192.168.1.25.49797 a23-214-81-55.deploy.static.akamaitechnologies.com.https ESTABLISHED

tcp4 0 0 192.168.1.25.49796 wb-in-f109.1e100.net.imaps ESTABLISHED

tcp4 0 0 192.168.1.25.49793 edge-star-mini-shv-01-fra3.facebook.com.https ESTABLISHED

any ideas ?