This is used by loads of applications, utilities and rcon tools.
Breaking it and expecting everyone to fix it over night is not
really practical.
What was the reason for making this change?
I'm assuming its to try and eliminate amplification attacks?
If so the query protocol for which A2S_RULES (I'm assuming
S2A_RULES was a typo) is a component already protects against
this as it requires a valid prior challenge.
If all this is true then I'd echo others responses in that this
needs to be either fixed to allow this or reverted until a
better solution can be found.
Regards
Steve
----- Original Message -----
From: "Vitaliy Genkin" <[email protected]>
To: <[email protected]>
Sent: Friday, February 21, 2014 5:48 PM
Subject: Re: [Csgo_servers] CSGO 1.32.3.0
Do server operators need S2A_RULES response from game servers? Previously S2A_RULES response included names and values of all
server convars flagged as "FCVAR_NOTIFY", but nothing in Steam uses this packet type anymore so I don't think any services are
affected.
If you have control of your tool(s)/webpage(s) you can stop requesting rules from the game server(s) (e.g. don't generate PHP
GetRules() request). If you really need something in response we can come up with ideas, or we can just stop spamming the console
and still not respond to that packet.
The spew comes up because the server can no longer send more than one packet in response to a single packet external request, and
if the response is exceeding MTU size the server will not send anything at all instead of sending a partial truncated packet. This
is the message that is spewed to server console to inform about response that was not sent out and its estimated bytelength -
[NET] Cannot send connectionless packet to xxx.xxx.xxx.xxx:58353 '0x45'
exceeding MTU (2447)
Also replying to a question asked earlier -- threaded socket processing is on by default. Official servers are operated by Valve,
unless server operators install special server plug-ins game servers should no longer record or transmit client IP addresses.
Hope this helps,
-Vitaliy
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