vnick wrote > On Tue, Nov 7, 2017 at 3:19 PM, glarkin53 < > greg.larkin@
> > wrote: > >> Hi, >> >> I'm working on a project to provide access to Windows desktops hosted on >> Amazon AWS. We spin up a number of Windows EC2 instances (Windows 2012 R2 >> servers) and then connect to them with Guacamole. >> >> Upon the first connection to a machine, it has the Amazon auto-generated >> hostname, such as "win-oekuqjop15l.us-west-2.compute.internal". Our >> process >> requires the hostname to be changed and the machine rebooted, so we may >> issue the following commands in a Powershell window: >> >> Rename-Computer glarkin >> Restart-Computer >> >> After the machine restarts, Guacamole is unable to connect to the >> machine. >> The dialog box reads "The remote desktop server is currently >> unreachable." >> The machine is still up and running, and I can connect to it with a >> desktop >> RDP client from my laptop, so I think there is a problem with Guacamole >> somewhere. >> > > Greg, > I suspect that you're running into a DNS caching issue on the system > hosting Guacamole. Depending on what distribution you're running, there > could be one of several daemons running that caches DNS information. > sssd, > nscd, and nslcd are the ones I can think of off the top of my head. Also, > depending on which DNS servers you're pointing at with your laptop vs. > Guacamole, it could be something on one of those systems, too. > > -Nick Hi Nick, Thanks very much for the reply. Would DNS caching be an issue if I'm using IP addresses only to create the connections in Guacamole? I should have clarified that I'm only using Amazon EC2 internal network IP addresses for the hostname in the Guacamole connections. Those IPs don't change, as far as I can tell, but I'll double-check that. I'm pretty sure they would if I powered the Windows machines completely off, but I'm only issuing a reboot. The other angle I'm pursuing is to start the Windows machines with a pre-selected hostname instead of the default. That way, our users would not have to rename the machines and reboot them. Thank you, Greg -- Sent from: http://apache-guacamole-incubating-users.2363388.n4.nabble.com/
