@bortzmeyer $ sudo apt install ssldump; wget -o /dev/null https://gist.github.com/zachwalton/883b08a2acb6a36177b189977b009593/raw/6adb968bf9f94b3373f725fdd9b9eeb6690152ce/wtftls.bash; sudo bash ./wtftls.bash -i any & openssl s_client -connect www.nouveaufrontpopulaire.fr:443ssldump is already the newest version (1.9-1).Summary: Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0[1] 22547Connecting to 162.159.138.44CONNECTED(00000003)40772DFB98740000:error:0A000410:SSL routines:ssl3_read_bytes:ssl/tls alert handshake failure:../ssl/record/rec_layer_s3.c:916:SSL alert number 40---no peer certificate available---No client certificate CA names sentNegotiated TLS1.3 group: <NULL>---SSL handshake has read 7 bytes and written 1570 bytesVerification: OK---New, (NONE), Cipher is (NONE)Protocol: TLSv1.3This TLS version forbids renegotiation.Compression: NONEExpansion: NONENo ALPN negotiatedEarly data was not sentVerify return code: 0 (ok)---$ Short read: -6659 bytes available (expecting 2)Error in TLS connection: handshake_failure [alert code 40]Reception of a handshake_failure alert message indicates that thesender was unable to negotiate an acceptable set of securityparameters given the options available. This is a fatal error.$ kill %1[1] + terminated sudo bash ./wtftls.bash -i any$ ``