Hello!  We're planning on updating the method that CSGO servers uses to talk to 
Steam in the week or two.  We'd appreciate your help testing this change in 
advance to identify any potential problems.

To see if this change will cause any problems with your setup, download this 
zip and follow the instructions in the readme.txt.  (Also pasted below.)

http://media.steampowered.com/apps/730/steam_bins_test_20170811.zip

Thanks for your help.  Post a reply here if you have any issues.  We're 
especially interested in hearing your results if you are running an older 
distribution of linux or have a complicated network environment.  (Multi-homed, 
NAT, etc.)

This change will also be coming to the older Source games, as well.  The 
binaries in this zip *should* be compatible with those games, although I 
haven't tested it specifically so there might be an issue.  We'll send a 
similar announcement to operators of those servers on the appropriate mailing 
list when we get closer to updating those games.

- Fletch


README.TXT:

Thanks for helping test compatibility with these new Steam binaries for the
dedicated server.

Place the files for your platform into your "bin" folder.  They should replace
files with the same name.  (steamerrorreporter.exe on Win32 is new.)

**PLEASE DELETE** the files listed below, if they are present:

                Linux:
                                libstdc++.so.6
                                libtier0_s.so
                                libvstdlib_s.so
                                libsteam.so

                Windows:
                                steam.dll

We believe that they are no longer be needed and we will no longer be shipping 
them.
Please let us know if this is not the case.

These binaries will communicate with Steam using the new WebSockets protocol. 
Previously
a bespoke UDP protocol was used.  You should see a TCP connection to a Valve 
server on
port 443, bound to a local ephemeral port.  There is currently no mechanism to 
control
what local IP or port this connection is bound to.  However, it does obey HTTP 
proxy,
so if you need to control the public IP you can do that.  (The master server 
may refuse
to list your server if the public IP used to talk to Steam does not match the 
IP you are
advertising for game traffic.)  Alternatively, you can add "-udpforce" on the 
command line
to disable websockets and force the use of the old UDP protocol.  Please don't 
do this
unless you need to.  In the future WebSockets will be the preferred (and 
better-supported)
protocol.  The UDP protocol will likely be around for some time, but eventually 
we'll
phase it out.

Things to test:
                * Does the server boot with those files deleted.  (Especially 
on old distros.)
                * Does the server have any trouble talking to Steam using 
websockets.

The connection_log[_xxx].txt file is also a potentially interesting source of
information about how your server is talking to Steam.

We will make a special announcement when we release the update that makes this 
change.
Until you see that announcement, you can assume that no change has been made to 
the
Steam binaries or method used to talk to Steam.
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