The certificate for mumble.freedombox.org:64738 expired on 11/28/2024.

$ openssl s_client -connect mumble.freedombox.org:64738 -servername mumble.freedombox.org 
CONNECTED(00000003)
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = E5
verify return:1
depth=0 CN = mumble.freedombox.org
verify error:num=10:certificate has expired
notAfter=Nov 27 23:52:41 2024 GMT
verify return:1
depth=0 CN = mumble.freedombox.org
notAfter=Nov 27 23:52:41 2024 GMT
verify return:1