[X2Go-Dev] Bug#684: Bug#684: Bug#684: select_session offers offline servers to X2Go Client

[Stefan Baur]

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Am 06.12.2014 um 23:56 schrieb Mike Gabriel:
> Then the X2Go Client should test if that X2Go Server address works
> (via a simple ping6/ping command, machines should always be
> pingable!!!)

Chiming in here:
Even if they aren't pingable - Port 22 (or whichever you've set in the
config as SSH port to be used) must be accepting connections.
You can test that on Linux with

nc -z ip.goes.he.re port_goes_here && echo "is reachable"

... and I'm sure there are ways to do that inside the client code, too.
Check if you can get a TCP handshake going within a set time frame (1
second? 2 seconds? 5 seconds?), then disconnect and proceed depending
on the result.

Actually ... simply lowering the timeout value for the currently
existing code that handles the connection, when called in broker
client mode, might already work.

- -Stefan

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