failed reading ticket: connection closed before authentication

James Crook

Active Member
Jul 28, 2017
So we keep getting this error on a lot of workstations when we have been logged into the host (with firefox, chrome or IE)
it seems to happen randomly, but when we come back to the logged in session and click on a console for a container we get get "failed"

if you look into the logs it says

client connection: V4(
failed reading ticket: connection closed before authentication
TASK ERROR: command '/usr/bin/termproxy 5900 --path /vms/18002 --perm VM.Console -- /usr/bin/ssh -e none -t -- /usr/bin/dtach -A /var/run/dtach/vzctlconsole18002 -r winch -z lxc-console -n 18002 -e -1' failed: exit code 1

If we close and reopen the whole browser or reboot the issues goes away for a while.


Proxmox Retired Staff
Retired Staff
Nov 19, 2018

what is your pveversion -v?

does the issue happen on containers only? or also with VMs?

can you post some of the configuration files for the guests? (qm config VMID for VM and pct config CTID for containers, replace VMID/CTID with guest number)

James Crook

Active Member
Jul 28, 2017
We only have containers, i'm unsure if it happens when trying to connect to the host as well tho, will see when it next happens

IP and MAC have been changed to protect the innocent

arch: amd64
cmode: console
cores: 2
hostname: SV1000-Test-SUSE15.2
memory: 2048
net0: name=eth0,bridge=vmbr6,firewall=1,gw=,hwaddr=11:11:11:11:11:11,ip=,type=veth
ostype: opensuse
rootfs: tank:subvol-18013-disk-0,size=100G
searchdomain: Test-SUSE.local
swap: 2048

Virtual Environment 6.4-13
Node 'ProxMoxNode1'
CPU usage
36.58% of 12 CPU(s)
IO delay
Load average
RAM usage
77.47% (42.47 GiB of 54.82 GiB)
KSM sharing
0 B
HD space(root)
20.47% (19.24 GiB of 93.99 GiB)
SWAP usage
0.13% (10.83 MiB of 8.00 GiB)
12 x Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz (1 Socket)
Kernel Version
Linux 5.4.140-1-pve #1 SMP PVE 5.4.140-1 (Wed, 08 Sep 2021 16:21:59 +0200)
PVE Manager Version
proxmox-ve: 6.4-1 (running kernel: 5.4.140-1-pve)
pve-manager: 6.4-13 (running version: 6.4-13/9f411e79)
pve-kernel-5.4: 6.4-6
pve-kernel-helper: 6.4-6
pve-kernel-5.3: 6.1-6
pve-kernel-5.4.140-1-pve: 5.4.140-1
pve-kernel-5.4.128-1-pve: 5.4.128-2
pve-kernel-5.4.114-1-pve: 5.4.114-1
pve-kernel-5.4.106-1-pve: 5.4.106-1
pve-kernel-5.4.78-2-pve: 5.4.78-2
pve-kernel-5.4.73-1-pve: 5.4.73-1
pve-kernel-5.4.65-1-pve: 5.4.65-1
pve-kernel-5.4.55-1-pve: 5.4.55-1
pve-kernel-5.4.44-2-pve: 5.4.44-2
pve-kernel-5.4.41-1-pve: 5.4.41-1
pve-kernel-4.15: 5.4-12
pve-kernel-5.3.18-3-pve: 5.3.18-3
pve-kernel-5.3.13-1-pve: 5.3.13-1
pve-kernel-4.15.18-24-pve: 4.15.18-52
pve-kernel-4.15.18-9-pve: 4.15.18-30
pve-kernel-4.15.17-1-pve: 4.15.17-9
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.1.2-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.1.0
libproxmox-backup-qemu0: 1.1.0-1
libpve-access-control: 6.4-3
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.4-3
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.2-3
libpve-storage-perl: 6.4-1
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.1.13-2
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.6-1
pve-cluster: 6.4-1
pve-container: 3.3-6
pve-docs: 6.4-2
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-4
pve-firmware: 3.3-1
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-6
pve-xtermjs: 4.7.0-3
qemu-server: 6.4-2
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.5-pve1~bpo10+1

James Crook

Active Member
Jul 28, 2017
It is a cluster (sorry should have said that)

can't upgrade to 7.1 as we have containers that have an old version of systemd :(


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