[Fess23X]

How to change server version?

[kadet.89]

To let players with any version join the server this function can be hooked:

INetChannel::ProcessPacket

and client version in C2S_CONNECT should be changed to the server's version. That will work if the server and client versions have identical exchange protocol. If they are not identical, the behavior will be unpredictable.
One more thing - structure netpacket_s in the SDK is outdated, buffer field should be shifted by 4 integers.

If you simply want to update your server, there is an instruction: https://developer.valvesoftware.com/wiki/SteamCMD
At the moment it is not possible to downgrade source servers.

[Marttt]

You can try changing the steam.inf file, but your clients have to use the same protocol

L4D2 file example:

Spoiler

PHP Code:

// NetworkVersion is the version in the wire protcol between client<->server,
// its not used for matchmaking, PatchVersion is used for that to ensure
// we don't get cross connecting to different releases.  Only bump this if
// you know an incompatible change has happened to the network protocol in
// game and old demos will not work.
NetworkVersion=2.1.0.0
PatchVersion=2.2.2.0
ProductName=left4dead2
appID=550 


[Fess23X]

Originally Posted by kadet.89 To let players with any version join the server this function can be hooked: INetChannel::ProcessPacket and client version in C2S_CONNECT should be changed to the server's version. That will work if the server and client versions have identical exchange protocol. If they are not identical, the behavior will be unpredictable. One more thing - structure netpacket_s in the SDK is outdated, buffer field should be shifted by 4 integers. If you simply want to update your server, there is an instruction: https://developer.valvesoftware.com/wiki/SteamCMD At the moment it is not possible to downgrade source servers.

I wanna download ofiical steam depots for game version on 8 march 2018, but i can't find need server depot. Can u help me ?

[BeepIsla]

You can download old versions of any Steam game (Client & Server) using DepotDownloader: https://github.com/SteamRE/DepotDownloader

And use SteamDB to find all the necessary IDs: https://steamdb.info/app/740/depots/

(You have to download both depots, click on their ID (731 & 740), click on "Manifests" on the left, and search the one you want to download)

Then just run it like any normal SRCDS server, it will connect to Steam as if it would be an up-to-date server with no issues. Although your console will tell you that you are out of date every now and then.