Доступ

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

ssh 192.168.1.20 (PuTTY)

login/password - ubnt/ubnt

vi /tmp/system.cfg

httpd.https.status=enabled  to disabled

press ESC then type :wq to save the file

cfgmtd -w -f /tmp/system.cfg

reboot

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Or old Netscape Navigator 9