VNC connects then times out

[jdh239]

This used to work, but VNC started failing for me today when connecting to headless guests. What started it was my interface renaming itself on a reboot. I was able to get everything up and running again fine, except for the VNC connections. A network trace shows the client connecting to the server (syn, synack, ack), but then the server does nothing. After 20-30 seconds the client times out and I can't connect to the VM guest. I know something on the server must be broken, but don't know where to look. Ideas?

HOST: Ubuntu 16.04
FIREWALL (Disabled)

Code: Select all

#/home/vbox/VirtualBox VMs/ocfs1# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

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#/home/vbox/VirtualBox VMs/ocfs1# netstat -ant | grep 4010
tcp        0      0 0.0.0.0:4010            0.0.0.0:*               LISTEN
tcp6       0      0 :::4010                 :::*                    LISTEN

[Perryg]

Post the guests log file ( as an attachment ). Right click on the guest in the Main Manager then click show log. Save and post as an attachment. Compress if it is too large to post.

[jdh239]

Thx for the help. I checked ip_forward this morning and it is setup up correctly too. See attached log.

[Perryg]

You mention VNC but the extension pack installed is vRDP. How exactly are you trying to connect and to what? VNC and vRDP are not compatible so be explicit.

[jdh239]

VNC Viewer.
I forgot about trying RDP. Is there a VNC-specifc ext pack? I thought there was only one ext pack.

[Perryg]

Yes there is a VNC extension pack, but it is available through your distro and only supported by them.

[jdh239]

OK, thx for the info. I will see if I can find the ext pack and give it a shot.