SteamGuard could use some additional configuration options. I want it
to be enabled at *all* times. I want a personal visit from VALVe staff
if an attempt to disable it is made.

Is that sentry file tied to the actual computer it's generated on?
Maybe that is an attack possibility. Get a hold on the file and be
able to log in from any computer you want.

On Sun, Jan 22, 2012 at 9:44 PM, Ryan Stecker <voidedwea...@gmail.com> wrote:
> Your machine/account is identified by a file in the steam directory. The
> file is called a "sentry file" and it's name is in the form of
> ssfn<numbers>. The steam client provides a sha1 hash of this file at logon,
> and the back-end confirms the validity of it.
>
> Deleting the file would require you to enter another email auth code, and
> Steam will generate another sentry file.
>
> You cannot log into a SG enabled account without either the sentry file
> belonging to the account or the email auth code.
>
> On Sun, Jan 22, 2012 at 2:18 PM, ics <i...@ics-base.net> wrote:
>
>> I don't know what they did but i used to get a lot of promps about
>> entering the code delivered to my e-mail in order to log in previously. I
>> haven't seen that dialog for months.
>>
>> I also know that the thing leaves some sort of imprint to the machine
>> itself but ip-changes especially did this prompt for me.
>>
>> -ics
>>
>> 22.1.2012 22:03, javato...@yahoo.es kirjoitti:
>>
>>  As far as i know steam guard check the computer, not ip. Maybe im wrong
>>> but i was  never blocked because of a ip change.
>>>
>>>> I agree, but there seems to be a lot of users with dialups who'se ip's
>>>> change all the time and they previously posted on the forums and complained
>>>> a lot about it. Perhaps this led to decision to lighten Steam Guard
>>>> settings or features.
>>>>
>>>> Atleast Valve added craft recepies for the xmas weapons for TF2 after
>>>> considerable whine on SPUF TF2 section and suddenly the recepies were
>>>> added, leaving the much older recepies off and not added.
>>>>
>>>> This proves that Valve listens and reads the forums but the decisions
>>>> are not always what they should be. Small minority seems to be making too
>>>> much noise there and affecting decisions.
>>>>
>>>> -ics
>>>>
>>>> 22.1.2012 21:33, javato...@yahoo.es kirjoitti:
>>>>
>>>>> I think steam guard should be on ALWAYS, theres no point to disable it.
>>>>> It just take 2 minutes to enable a new computer so shoulnt be an option to
>>>>> be able to disable it. Just my opinion...
>>>>>
>>>>>> SteamGuard can be disabled entirely from a trusted computer without
>>>>>> *any* notification or hassle.
>>>>>> Don't like this.
>>>>>>
>>>>>> On Sun, Jan 22, 2012 at 7:06 PM, Mart-Jan Reeuwijk<mreeu...@yahoo.com>
>>>>>>  wrote:
>>>>>>
>>>>>>> hmm, I do have hope they mean with that the SteamGuard protected
>>>>>>> account in
>>>>>>> question. And it DOES send a mail.... after, to notify you of the
>>>>>>> change and a link to steam support, see below:
>>>>>>>
>>>>>>> ==============================**==
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Dear<snip>,
>>>>>>>
>>>>>>> This email message confirms that your Steam account contact email
>>>>>>> address has been successfully changed.
>>>>>>> We are sending this notice to ensure the privacy and security of your
>>>>>>> Steam account. If you authorized this change, no further action is
>>>>>>> necessary. If you did not authorize this change, or if you need
>>>>>>> additional help with your account, please follow this link to the
>>>>>>> Steam
>>>>>>> Support site and submit a request for assistance:
>>>>>>>
>>>>>>> http://support.steampowered. com/cgi-bin/steampowered.cfg/
>>>>>>> php/enduser/std_adp.php?p_ faqid=197
>>>>>>> Thanks for reviewing this information and helping us to maintain the
>>>>>>> privacy and security of your account.
>>>>>>>
>>>>>>> The Steam Support Team
>>>>>>> http://www.steampowered.com
>>>>>>> ==============================**=======
>>>>>>> I'd be against any "easy" like this.
>>>>>>>
>>>>>>>
>>>>>>> Maybe implement a "panic" button, where the old login info can be
>>>>>>> used for x
>>>>>>> time (3 days or some) after it got changed, and then the account can
>>>>>>> be
>>>>>>> locked with this by the real owner, only undoable by a support ticket.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>  ______________________________**__
>>>>>>>> From: Ryan Stecker<voidedwea...@gmail.com**>
>>>>>>>> To: Mart-Jan Reeuwijk<mreeu...@yahoo.com>; Half-Life dedicated
>>>>>>>> Linux server mailing 
>>>>>>>> list<hlds_linux@list.**valvesoftware.com<hlds_linux@list.valvesoftware.com>
>>>>>>>> >
>>>>>>>> Sent: Sunday, 22 January 2012, 17:53
>>>>>>>> Subject: Re: [hlds_linux] Another high profile trader/admin hijacked.
>>>>>>>>
>>>>>>>>
>>>>>>>> There was a recent feature addition to steam that allows email
>>>>>>>> changes without confirmation for trusted computers.
>>>>>>>>
>>>>>>>> http://store.steampowered.com/**news/7114/<http://store.steampowered.com/news/7114/>
>>>>>>>>
>>>>>>>> I believe "trusted computer" in that sense means any account with SG
>>>>>>>> enabled and authenticated. That would make it a quite frightening 
>>>>>>>> change,
>>>>>>>> and I believe email confirmation should always be required.
>>>>>>>>
>>>>>>>> It may be possible he fell victim to this.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sun, Jan 22, 2012 at 10:17 AM, Mart-Jan Reeuwijk<
>>>>>>>> mreeu...@yahoo.com>  wrote:
>>>>>>>>
>>>>>>>> I can confirm that he is:
>>>>>>>>
>>>>>>>>> - Author on EventScripts
>>>>>>>>> - Admin on SteamRep.com
>>>>>>>>> - Reddit Admin "thorax"
>>>>>>>>>
>>>>>>>>> - And I did have a "slowchat" with him on a private section of a
>>>>>>>>> forum. He confirmed to me and others there that the security he listed
>>>>>>>>> there was as how he runs it.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Quote from him from that forum's private section:
>>>>>>>>> I have to go to bed, but you can see my security precautions here:
>>>>>>>>> http://www.reddit.com/r/**tf2trade/comments/orbjk/iama_**
>>>>>>>>> mattie_fellow_with_the_**largest_unusual_tc/<http://www.reddit.com/r/tf2trade/comments/orbjk/iama_mattie_fellow_with_the_largest_unusual_tc/>
>>>>>>>>>
>>>>>>>>> My password policy was numbers, letters, spaces, upper-case
>>>>>>>>> letters, but only 9 characters on Steam.
>>>>>>>>>
>>>>>>>>> My passwords are different everywhere. He somehow disabled
>>>>>>>>> SteamGuard, probably remotely.
>>>>>>>>>
>>>>>>>>> If you recall, I helped datastorm review that hijack avoidance
>>>>>>>>> document.  You pretty much don't get more paranoid than me. I run 3 
>>>>>>>>> types of
>>>>>>>>> malware detection and use Process Explorer multiple times a day to
>>>>>>>>> look
>>>>>>>>> for any unsigned processes running to identify exactly what they
>>>>>>>>> are.
>>>>>>>>>
>>>>>>>>> Whatever this hijacker's attack is, it's not something common and
>>>>>>>>> not
>>>>>>>>> something that we have good explicit tips for people to avoid. I'll
>>>>>>>>> continue brainstorming tomorrow
>>>>>>>>>
>>>>>>>>> *snip non relevant*
>>>>>>>>>
>>>>>>>>> As I may have mentioned, he told multiple people that he targetted
>>>>>>>>> me
>>>>>>>>> specifically because I tried to stop so many of the latest hijacks
>>>>>>>>> and
>>>>>>>>> because I gave people tips to stop hijackings (especially double
>>>>>>>>> hijackings). I'm sure money had something to do with it, too, but he
>>>>>>>>> told my wife he did it for the challenge. Well, he won.
>>>>>>>>>
>>>>>>>>> [/Quote]
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Shame that his collection with regaining the account will be duped,
>>>>>>>>> and therefore be worth a lot less. Also a pain that SteamGuard isn't 
>>>>>>>>> the
>>>>>>>>> rigid security I'd hoped for
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>  ______________________________**__
>>>>>>>>>> From: ics<i...@ics-base.net>
>>>>>>>>>> To: Half-Life dedicated Linux server mailing list<hlds_linux@list.
>>>>>>>>>> **valvesoftware.com <hlds_linux@list.valvesoftware.com>>
>>>>>>>>>> Sent: Sunday, 22 January 2012, 16:11
>>>>>>>>>> Subject: Re: [hlds_linux] Another high profile trader/admin
>>>>>>>>>> hijacked.
>>>>>>>>>>
>>>>>>>>>> Thats a bit of interesting thing in any case anyway, as if that's
>>>>>>>>>> really the Mattie and he did have security in order listed on reddit 
>>>>>>>>>> and
>>>>>>>>>> still was hacked, then does Steam has security issues again (forums
>>>>>>>>>> anyone)? Steamguard ineffective? Interesting to see if he had the 
>>>>>>>>>> fault or
>>>>>>>>>> Steam.
>>>>>>>>>>
>>>>>>>>>> -ics
>>>>>>>>>>
>>>>>>>>>> 22.1.2012 16:43, Yuki kirjoitti:
>>>>>>>>>>
>>>>>>>>>>> Correct! However, sorry to burst your bubble, but technically
>>>>>>>>>>> this is Source server administration related.
>>>>>>>>>>> http://mattie.net/cs/
>>>>>>>>>>> While it may be on a tangent, there's no need to blacklist a
>>>>>>>>>>> topic like this from the list!
>>>>>>>>>>>
>>>>>>>>>>> On 22/01/2012 14:39, Alex Kowald wrote:
>>>>>>>>>>>
>>>>>>>>>>>> This mailing list is for source server administration related
>>>>>>>>>>>> topics.
>>>>>>>>>>>>
>>>>>>>>>>>> On Sun, Jan 22, 2012 at 8:31 AM, Mart-Jan Reeuwijk<
>>>>>>>>>>>> mreeu...@yahoo.com>   wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> another high profile trader admin hijacked:
>>>>>>>>>>>>>
>>>>>>>>>>>>> http://www.reddit.com/r/**tf2trade/comments/orbjk/iama_**
>>>>>>>>>>>>> mattie_fellow_with_the_**largest_unusual_tc/<http://www.reddit.com/r/tf2trade/comments/orbjk/iama_mattie_fellow_with_the_largest_unusual_tc/>
>>>>>>>>>>>>>
>>>>>>>>>>>>> steamID: Mattie! (busy - sorry)
>>>>>>>>>>>>> steamID32: STEAM_0:0:5712733
>>>>>>>>>>>>> steamID64: http://steamcommunity.com/**
>>>>>>>>>>>>> profiles/76561197971691194<http://steamcommunity.com/profiles/76561197971691194>
>>>>>>>>>>>>> customURL:
>>>>>>>>>>>>> steamrepURL: http://www.steamrep.com/index.**
>>>>>>>>>>>>> php?id=76561197971691194<http://www.steamrep.com/index.php?id=76561197971691194>
>>>>>>>>>>>>> ______________________________**_________________
>>>>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>>>>>>>> archives, please visit:
>>>>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>>>>>>>
>>>>>>>>>>>> ______________________________**_________________
>>>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>>>>>>> archives, please visit:
>>>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> ______________________________**_________________
>>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>>>>>> archives, please visit:
>>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ______________________________**_________________
>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>>>>> archives, please visit:
>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>  ______________________________**_________________
>>>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>>>> archives, please visit:
>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>  ______________________________**_________________
>>>>>>> To unsubscribe, edit your list preferences, or view the list
>>>>>>> archives, please visit:
>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**
>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>>
>>>>>> ______________________________**_________________
>>>>>> To unsubscribe, edit your list preferences, or view the list archives,
>>>>>> please visit:
>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>>
>>>>>>
>>>>>
>>>>> ______________________________**_________________
>>>>> To unsubscribe, edit your list preferences, or view the list archives,
>>>>> please visit:
>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>>
>>>>
>>>>
>>>> ______________________________**_________________
>>>> To unsubscribe, edit your list preferences, or view the list archives,
>>>> please visit:
>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>>
>>>>
>>>
>>> ______________________________**_________________
>>> To unsubscribe, edit your list preferences, or view the list archives,
>>> please visit:
>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>>
>>
>>
>> ______________________________**_________________
>> To unsubscribe, edit your list preferences, or view the list archives,
>> please visit:
>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux>
>>
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