I've had a Lubuntu 16.10 server running as a guest VM on an ESXi 6.5 (free edition) host for a couple of weeks. Until last night it was running fine, but today it is having major problems with both inbound and outbound network connections:
- Timeouts accessing web resources on both LAN and WAN (e.g. BBC website or Logitech Media Server web GUI running on the LAN). Internal sites can sometimes be accessed, but not for long. External sites pretty much always time out
- No inbound connections possible to VNC server or mediawiki site on the Lubuntu machine from other machines on the LAN (was working fine until this morning). The mediawiki site is up and running, and can be accessed from the Lubuntu machine itself. I did fleetingly manage to access a couple of pages from the mediawiki site from another machine on the LAN, but then it stopped responding, so it seems to be a performance rather than connectivity issue (and it was connecting fine until this morning)
- Unable to download software packages in Synaptic package manager - the installer virtually hangs trying to download a package.
There is one other VM running on the same ESXi host - a Windows machine. This has absolutely no network issues (inbound or outbound), so I assume that the networking hardware is fine on the host. I've tried shutting down the other VM but it didn't help. I've also tried rebooting the router/gateway and the Lubuntu server.
I originally had the network interface configured as E1000. I've tried changing it to VMXNET 3 but it made no difference.
Can anyone advise on how I can diagnose this issue? I'm an ESXi and Linux novice so please bear with me!
Last edited by ianmanning; 19 Minutes Ago at 10:59 AM.