Why XS1930 shows "server certificate has been failed" when I update access Layer 3 license status?
Zyxel_Melen
Posts: 3,854 
Guru Member
Guru Member
in Other Topics
There are two possible reasons for this issue:
- Your switch system time is not up to date. Please correct the system time or synchronize with the time server.
- Your firewall might block ports 80(HTTP)/443(HTTPS). Please allows these ports on your firewall.
Zyxel Melen
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