Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings and try connecting to https://192.168.15.100 again. If this error persists, it is possible that this site uses an unsupported protocol or cipher suite such as RC4 (link for the details), which is not considered secure. Please contact your site administrator.
all these are enabled on my computer,i tried from explorer and from Fox with no hope.
any support i highly appreciated.
Thanks