Hi, We performed no updates on our infrastructure and since today, on some guests (not all), we see the following error in the libvirtd logs 140085012483328:error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640: (process:375537): Spice-WARNING **: reds-stream.c:469:reds_stream_ssl_accept: SSL_accept failed, error=1 Other guests works fine. We are trying from Mac with remote-viewer and we use OS Version: RHEL - 7 - 4.1708.el7.centos OS Description: CentOS Linux 7 (Core) Kernel Version: 3.10.0 - 693.el7.x86_64 KVM Version: 2.10.0 - 21.el7_5.3.1 LIBVIRT Version: libvirt-3.9.0-14.el7_5.5 VDSM Version: vdsm-4.19.45-1.el7.centos SPICE Version: 0.14.0 - 2.el7_5.3 CEPH Version: librbd1-0.94.5-2.el7 And latest virt-viewer. Could anybody help us to the right direction? Currently, we cannot access the console of those VMs and we have no idea why. Thanks,Trefex