[cod] COD4: 2 players with same guid (hack?)

[csmith]

I do not believe this to be correct. My wife and I have separate CD keys 
and play together all the time. both status and pb_sv_plist on my server 
(which is not on our LAN) shows the same IP address with different GUIDs.

Andre Lorbach wrote:
> I know what a GUID is supposed to be and what an IP address is!
>
> An example will explain what I meant in the first place, lets take the 2
> brothers sample:
> BrotherA connects to the a cod4 server and gets the GUID
> 549f8ire98hfji5490htfjoi590gf9i04. The auth server stores the IP and
> GUID and caches this information as I believe for at least 10 minutes.
> Now BrotherB connects to a Cod4 Server, the master server sees the IP of
> BrotherB which is the same as BrotherA, and assigns the cached GUID to
> BrotherB which is 549f8ire98hfji5490htfjoi590gf9i04. BrotherA and
> BrotherB play with the same GUID, but having different cdkeys. 
>
> I believe this is how it works since Cod2. 
>
> Regards,
> Andre
>
>
>   
>> -----Original Message-----
>> From: Ronny Schedel [mailto:info at ronny-schedel.de]
>> Sent: Monday, March 03, 2008 11:05 AM
>> To: cod at icculus.org
>> Subject: Re: [cod] COD4: 2 players with same guid (hack?)
>>
>> It's not working in this way.
>>
>> guid = global unique identifier
>>
>> An IP is not global unique and cannot be used as guid. The CD key is a
>> global unique and is used. We have a statistic system running, which
>>     
> relies
>   
>> on guids. I have also a dynamic IP address, but my guid remains always
>>     
> the
>   
>> same, because the guid depends from the CD key. If two people have the
>>     
> same
>   
>> guid, then they have the same CD key.
>>
>> Best regards
>>
>> Ronny Schedel
>>
>> ----- Original Message -----
>> From: "Andre Lorbach" <alorbach at ro1.adiscon.com>
>> To: <cod at icculus.org>
>> Sent: Monday, March 03, 2008 10:38 AM
>> Subject: RE: [cod] COD4: 2 players with same guid (hack?)
>>
>>
>> The master server is caching the Guids based on IP, people playing
>>     
> from
>   
>> the same location (typically like brothers in LAN) often have the same
>> GUID, but use different cdkeys! I believe them game is forcing
>> pb_sv_guidrelax 7 because of this.
>>
>> And there are also other issues which can happen because of this kind
>>     
> of
>   
>> caching behavior, I have seen this one at least ONCE. Let me explain
>> what happened...
>>
>> A clanm8 came to me and told me he got kicked for GLOBAL BAN once, but
>> never again then.
>> So I searched the logfiles and saw that his GUID was different for
>>     
> this
>   
>> one time when he got kicked.
>> He told me he did not change his cdkey, and I believe him because it
>> doesn't make sense to change your key to a banned one, and change it
>> back then.
>>
>> So here is what I think happened, and you must know that in germany we
>> usually have a forced disconnect every 24hours where we get a new IP
>> assigned. IP's are rare, so it is very usual to get an IP somebody
>>     
> else
>   
>> wasusing 5 minutes ago. Somebody with a Global banned key tried to
>>     
> play
>   
>> Cod4 minutes ago, then got a disconnect. My m8 had the disconnect a
>>     
> few
>   
>> minutes after this, and obtains the IP from the global banned player.
>>     
> My
>   
>> clanm8 connects to a server, and the master auth server uses the
>>     
> cached
>   
>> (and banned) GUID for my clanm8.
>>
>> It's a very rare condition but not impossible to happen.
>>
>> Best regards,
>> Andre
>>
>>
>>     
>>> -----Original Message-----
>>> From: Ronny Schedel [mailto:info at ronny-schedel.de]
>>> Sent: Sunday, March 02, 2008 5:02 PM
>>> To: cod at icculus.org
>>> Subject: [cod] COD4: 2 players with same guid (hack?)
>>>
>>> Hello,
>>>
>>> today we had 2 players with the same guid on our COD4 server. Is it
>>>       
> a
>   
>> hack?
>>     
>>> Can we prevent this server side?
>>>
>>> Best regards
>>>
>>> Ronny Schedel
>>>
>>>
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>>>
>>>       
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>>
>>
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>>     
>
>
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>
>