Steam does not know who is banned from a specific server and never will. Only 
the server knows who is banned. If you allow bans on a HWID, the server knows 
the HWID, and thus so do the 'server ops'.

Scruppy Dawg <[email protected]> wrote:

>As long as Valve stores the HWID for each SteamID then they could make that
>available as a banning mechanism to server ops without exposing it. They
>would just have to add something to the Steam authentication when you join
>a server and check that HWID against your banned list.
>
>I would ban a SteamID and add the option that I want the HWID associated
>with it banned.
>
>SteamID A with HWID 1111 is banned from my servers.
>
>But later if SteamID B joins with HWID 1111 a check is done on auth and
>they are not allowed to join.
>
>I would have to think most of this logging is already in place and it would
>just be a matter of changing the server and auth method.
>
>
>On Sat, Aug 24, 2013 at 6:59 AM, Bjorn Wielens <[email protected]> wrote:
>
>> That wouldn't work. unless Valve implements a global ban system where they
>> track HWIDs and such for bans (which they never will do) , the HWID would
>> HAVE to be shared to be able to ban by it. You can hardly ban someone by a
>> particular attribute of their account (or indeed check to see if they are
>> banned by said attribute) without actually knowing the attribute in the
>> first place.
>>
>>
>>
>>
>> ________________________________
>>  From: Scruppy Dawg <[email protected]>
>> To: Mart-Jan Reeuwijk <[email protected]>; Half-Life dedicated Linux
>> server mailing list <[email protected]>
>> Sent: Saturday, August 24, 2013 3:33:28 AM
>> Subject: Re: [hlds_linux] Add something to the game so that server ops can
>> ban HWID too.
>>
>>
>> Like I said, the HWID itself wouldn't be shared. When you ban a SteamID
>> there would be something you would add to the ban command to issue a HWID
>> ban on that SteamID as well.
>>
>>
>> On Sat, Aug 24, 2013 at 12:27 AM, Mart-Jan Reeuwijk <[email protected]
>> >wrote:
>>
>> > Steamguard generates a random number for the client, which is "linked" to
>> > the machine afaik with the steam client. You cannot get that one, that
>> > would be bad.
>> >
>> > The HWID, is generated at installation of steam I think, and is probably
>> > passed on to Valve at logon every time. Never really looked at it. But
>> > sharing that has other security issues I guess.
>> >
>> > its a strange thing, for things conflict a lot.
>> > - Valve can't discuss individual accounts specifics (being a alt account
>> > of somebody would prolly be not good for them in legal)
>> > - sharing such identifying info would benefit the server owners in the
>> > amount of effort needed to keep their servers clean, but that would be
>> > defeated by some those hackers would start to do to prevent such.
>> >
>> > I do not think valve would want to start that arms race. I rather have
>> > them up the par on VAC, as far as I hear, there are now various cheats
>> that
>> > aren't been vac'd by valve after x time. They do move over to new account
>> > for too many servers they got banned on to be able to join much.
>> >
>> >
>> >
>> >
>> > >________________________________
>> > > From: Eli Witt <[email protected]>
>> > >To: Half-Life dedicated Linux server mailing list <
>> > [email protected]>
>> > >Sent: Friday, 23 August 2013, 22:05
>> > >Subject: Re: [hlds_linux] Add something to the game so that server ops
>> > can ban HWID too.
>> > >
>> > >
>> > >It really depends on how the HWID is generated and if they're fuzzy or
>> > not.
>> > >It could literally be as simple as a 1 digit change to a MAC address on
>> a
>> > >NIC that's not even active, or it could stamp every piece of hardware
>> that
>> > >it can pull unique information from and fuzzy the shit out of it.
>> > >
>> > >
>> > >On Fri, Aug 23, 2013 at 7:56 AM, dan <[email protected]> wrote:
>> > >
>> > >> On 23/08/2013 01:43, Scruppy Dawg wrote:
>> > >>
>> > >>> Everyone knows the HWIDs are stored due to Steamguard (Or some form
>> of
>> > >>> HWID, anyway). Couldn't Valve simply add something so that server
>> > >>> operators, when banning a SteamID, can also elect to ban the
>> associated
>> > >>> HWID? The HWID never needs to be exposed to the server admins.
>> > >>>
>> > >>
>> > >> Is it difficult to change hwid though?
>> > >>
>> > >> I can't say I've looked at it or care about it, but if something as
>> > simple
>> > >> as
>> > >> changing the mac address alters it, it's not likely to improve
>> anything.
>> > >>
>> > >> It sounds like one of these things that might work for a week or 2 and
>> > then
>> > >> cheaters would just figure out a way of working around it.
>> > >>
>> > >> Auto detecting cheating and kicking / banning seems the best approach.
>> > >> Doesn't SMAC and the alternatives work well enough to do that?
>> > >>
>> > >> I've got to say I don't really notice a significant problem with
>> > cheaters
>> > >> in TF2
>> > >> on the servers I play on.
>> > >>
>> > >> I can't imagine why someone would keep creating accounts and going
>> back
>> > to
>> > >> the same server
>> > >> only to be kicked and banned immediately, unless it's reached the
>> point
>> > >> where
>> > >> he's just doing it to wind the server owner and admins up.
>> > >>
>> > >> --
>> > >> Dan
>> > >>
>> > >>
>> > >> ______________________________**_________________
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>> > >>
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>> > >
>> > >
>> > >
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