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• Better way to stop/start Webmin and SSH

  - by Jake

  Hi, it would be a good idea to not have webmin running all the time... just start it via ssh when I need it... so, I just stop webmin,and leaving SSH always running... when I need to access webmin, I start it through SSH. but there are lots of people from many country trying to bruteforce my SSH. I can reduce bruteforce using iptables. but because Im feeling still not safe (about 3 months ago), so I stop SSH and leaving webmin always running through custom port. I just start SSH through webmin when I need. and the result, no more bruteforce on SSH, and no bruteforce on webmin (maybe because the attacker dont know my webmin custom port) but I think this is still not really safe. and I cannot restrict access to some IP because I use random IP. If I stop both SSH and webmin, I will lost access to my server. Anyone know the better way dealing with this?

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• phpmyadmin login should not expire on ubuntu 10.04

  - by mit

  On ubuntu 10.04 the phpmyadmin config is a little bit scattered. I want to set the loginexpiration time to zero, should never expire, this is a secured setup behind a firewall. I think it is 3600 by default but cannot find the setting. Where is it? Edit: I actually changed it in /etc/phpmyadmin/conf.inc.php which seems the recommended place for ubuntu. The other files mentioned below might be overwritten on updates.

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• Configure Windows firewall to prevent an application from listening on a specific port

  - by U-D13

  The issue: there are many applications struggling to listen on port 80 (Skype, Teamviewer et al.), and to many of them that even is not essential (in the sense that you can have a httpd running and blocking the http port, and the other application won't even squeak about being unable to open the port). What makes things worse, some of the apps are... Well, I suppose, that it's okay that the mentally impaired are being integrated in the society by giving them a job to do, but... Programming requires some intellectual effort, in my humble opinion... What I mean is that there is no way to configure the app not to use specific ports (that's what you get for using proprietary software) - you can either add it to windows firewall exceptions (and succumb to undesired port opening behavior) or not (and risk losing most - if not all - of the functionality). Technically, it is not impossible for the firewall to deny an application opening an incoming port even if the application is in the exception list. And if this functionality is built into the Windows firewall somewhere, there should be a way to activate it. So, what I want to know is: whether there exists such an option, and if it does how to activate it.

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• (200 ok) ACCEPTED - Is this a hacking attempt?

  - by Byran

  I assume this is some type of hacking attempt. I've try to Google it but all I get are sites that look like they have been exploited already. I'm seeing requests to one of my pages that looks like this. /listMessages.asp?page=8&catid=5+%28200+ok%29+ACCEPTED The '(200 ok) ACCEPTED' is what is odd. But it does not appear to do anything. I'm running on IIS 5 and ASP 3.0. Is this "hack" meant for some other type of web server?

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• Shibboleth: found encrypted assertions, but no CredentialResolver was available

  - by HorusKol

  I've gotten a Shibboleth Server Provider (SP) up and running, and I'm using the TestShib Identity Provider (IdP) for testing. The configuration appears to be all correct, and when I requested my secured directory I was sent to the IdP where I logged in and then was sent back to https://example.org/Shibboleth.sso/SAML2/POST where I am getting a generic error message. Checking the logs, I am told: found encrypted assertions, but no CredentialResolver was available I have rechecked the configuration, and there I have: <CredentialResolver type="File" key="/etc/shibboleth/sp-key.pem" certificate="/etc/shibboleth/sp-cert.pem"/> Both of these files are present at those locations. I've restarted apache and retried, but still get the same error. I don't know if it makes a difference - but only a subdirectory of the site has been secured - the documentroot is publicly available.

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• Windows 7 : Any way to disable "show caracter" in WIFI network properties?!

  - by Fox

  Hi everyone, Here's my issue. I'm working in a school as IT Tech and I'm currently planning to roll out Windows 7 on students laptop. The issue is : When you go to the properties of a WIFI network, you have the fields to input the WIFI key, WPA2 key here in my case, and you also have a checkbox that allow you to "unmask" the caracters of the wifi key. This is actually the problem. Anyone who can access the WIFI network properties, will be able to see the WIFI key, which is really an issue in a school envrironnement where student are all eager to get the key for their precious IPod Touch, what I don't want to happen for obvious reasons... So, is there a way to disable that checkbox or else, make the field cleared out when the checkbox is checked, just like it was on Windows XP or Vista? Thanks all for your answer.

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• How do I disable location services system wide?

  - by Daisetsu

  Google has an API which can determine someone's location based on the wifi router names which a user's computer can see. You will see this if you go to google maps and your browser may ask if you would like to share location data. I am wondering if there is any way to disable this on a system wide setting rather than just in each browser (Chrome can do this too). Is there any way I can limit which applications have a list of the wireless routers I can see?

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• How to keep Flash secured with EMET?

  - by Indrek

  I use EMET to secure a number of applications on my computer - web browsers, Office suite applications, PDF readers, as well as Adobe Flash. Overall it's working great, except that the Flash executables contain the version number in the file name, so every time there's an update, the file names change and I have to remember to re-add them manually to EMET. Is there a way to streamline this process? EMET does support wildcards, but only in the path itself, not the file name, so something like %windir%\system32\Macromed\Flash\*.exe wouldn't work. Is there any other way to add a whole folder to EMET so that any new executables in that folder are automatically secured?

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• What advantages does mod_evasive have over mod_security2 in terms of DDOS protection?

  - by Martynas Sušinskas

  Good day, I'm running an Apache2 server in front of a Tomcat and I need to implement a DDOS protection mechanism on the Apache2 layer. I have two candidates: mod_evasive and mod_security2 with the OWASP core rule set. Mod_security is already installed for overall protection, but the question is: is it worth adding mod_evasive besides mod_security just for the DDOS (does it have any major advantages) or the OWASP crs rules in the /experimental_rules/ directory (modsecurity_crs_11_dos_protection.conf) provide the same protection? Or it's just a matter of preference? The sites are not very high traffic normally. Thank you for your answers, Martynas

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• Best practices for SQL Server audit trail

  - by Ducain

  I'm facing a situation today where it would be very beneficial to me and my company if we knew who had logged into SQL and performed some deletions. We have a situation where at least 2 (sometimes 3) people login to SQL using SQL Server Management Studio, and perform various functions. What we need is an audit trail. If someone deletes records (mistakenly or otherwise), I'd like to know what was done. Is there any way to make this happen?

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• Secure external connection to SQL Server (from third party software)

  - by Bart

  I have a SQL Express 2008 R2 server running on a server in an internal lan network. A few databases are used by some third party software to store data. A SQL-Server user is used by this application to connect to the database. Now I need to access this database using a local installation of the software from an external pc. In this particular case a VPN connection is not the solution I am looking for. I have access to an external linux server, so I tried ssh tunneling from the windows server to the linux server and use the external pc to tunnel it back from the linux server to the client, but this is working very very slow. What are my other options to allow this external connection in a safe way?

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• Determining who is running with administrator rights?

  - by Alex C.

  I work at a small non-profit organization with about 55 desktop PCs running Windows XP Pro. The domain controller is running Windows Server 2003. I have a two-part question (note that I'm a bit of a newb when it comes to network administration). Part 1: Is there some simple way that I can determine which accounts are logged in with administrator rights? Part 2: Is there a way that I can remove administrator rights from users without sitting down at each individual machine? Thanks for considering my questions.

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• SFTP File Restrictions.

  - by The Rook

  Is it possible to use SFTP on Linux and restrict a user account to ONE directory such that no other directory listing can be obtained? Yes, I must use SFTP, FTP is only used by people that love getting hacked. For instance I want someone to modify files in /var/www/code/ but I don't want them to be able modify anything else. I don't even want them to see the contents /tmp/. (I will accept a "quick and dirty" solution, as long as it is secure.)

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• Why can`t we treat SSL Certs like Pgp keys instead of trusting CAs?

  - by yarun can

  I am dumb and stupid and I do not know all the technical aspects of SSL and server/client side implications and implementations. However I understand them good enough from user point of view to use SSL and encyrption daily. I was thinking that how silly it is to trust some unknown/known CAs when it comes to our our certificates for our servers. There had been many cases of misconduct, misuse, compromises and theft of certificates/ca keys from those places. On top of those known issues we also have to pay these guys regularly. I am wondering why can not we use/treat web server certificates like we use our pgp keys? So I sign a SSL certificate and send to a central server. And then each user accessing my site checks the validity and the keys from some central server (like pgp key servers). Is this a stupid idea? If so what could be a better idea than current system of issuing valid certificates. I am looking for a better than more secure idea. Naturally this is not a solution to an existing problem, rather it will be a hypothetical solution for some future implementation of a currently messed up web of trust on the internet due to recent news about NSA and their criminal buddies around the world. thanks

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• If I scp a file through an intermediate server, is the file stored temporarily on the server?

  - by Blacklight Shining

  For the sake of simplicity (I find it easier to remember names than arbitrary letters), I will dispense with letters and use names to refer to the machines in this scenario. Say I have two machines, applejack and pinkie-pie, each on their own separate LANs and not in the same physical location. I also have a server, cadance, with a direct Internet-facing connection. I want to copy a file from applejack to pinkie-pie, so to avoid dealing with port forwarding and such, I set up an ssh tunnel from pinkie-pie to cadance (ssh -R etc cadance). Now I can connect to pinkie-pie from anywhere, by connecting to cadance and specifying an alternate port to use. I can also easily copy files to pinkie-pie with scp -P $that_port $some_file cadance:$some_path. My understanding of how it works is this: A secure connection is made from applejack to cadance I am authenticated to cadance A secure connection is made from applejack to pinkie-pie that spans the existing reverse tunnel and the new connection from step 1. I am authenticated to pinkie-pie Files are copied directly from applejack to pinkie-pie over this connection. Am I correct here? How secure is this approach? If I'm wrong…are files copied this way decrypted at cadance before being passed on to pinkie-pie? Is there a possibility that traces of unencrypted data could remain on cadance?

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• How to prepare and secure a Macbook Pro for work/office?

  - by sunpech

  I plan to use my Macbook Pro at work/office. Before I do so, I will need to speak to my manager on how to properly prepare and secure it since this is the first Mac that will be regularly used on the network in the office and company intranet. The intranet comprises mostly of PCs running Microsoft Windows XP, Server 2003, and Windows 7. So there's definitely a Microsoft-only culture in the office, and the infrastructure/networking team are mostly unfamiliar with non-Microsoft technology and software. What steps and software would I need to prepare and secure my Macbook Pro for work/office? Antivirus/Spyware software for Mac required/necessary? What options do I have to encrypt files, or possibly the whole drive/partition? What network/firewall settings should be enabled?

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• Remote hosts accessing AD's registry

  - by smitty user

  I have a situation here. I have an intrusion detection system and it constantly alerts me that a remote host is accessing our AD's registry remotely. Our remote hosts are mainly Windows XP and our ADs are W2K8. The remote hosts access them over SMB port 445 Is it normal for Windows hosts to access AD's remote registry? My colleagues confirmed with me that both host and AD is clean from virus with endpoint protection enabled. Thanks.

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• USB key to pass password in Centos 6

  - by Andrew

  I had a room mate that put a livecd in my desktop and looked around on my machine. I caught him in the act and threw him out. I haven't had a room mate for a while now and so as to avoid the livecd issue again I encrypted the hard drive, the machine is running centos 6.3. Is there anyway that I can avoid typing the password in each time if I have usb key in the machine to feed the password to the system? Additional question. Is there anything you can suggest to solve the problem I have ? Thanks

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• Securely wiping a file on a tmpfs

  - by Nanzikambe

  I have a script that decrypts some data to a tmpfs, the directory is secure (permissions), the machine's swap is encrypted (random key on boot) and when the script is done it does a 35 pass wipe (Peter Gutmann) of the cleartext on the tmpfs . I do this because I'm aware wiping files on a journaling file system is insecure, data may be recovered. For discussion, here're the relevant bits extracted: # make the tmpfs mkdir /mnt/tmpfs chmod 0700 /mnt/tmpfs mount -t tmpfs -o size=1M tmpfs /mnt/tmpfs cd /mnt/tmpfs # decrypt the data gpg -o - <crypted_input_file> | \ tar -xjpf - # do processing stuff # wipe contents find . -type f -exec bcwipe -I {} ';' # nuke the tmpfs cd .. umount -f /mnt/tmpfs rm -fR /mnt/tmpfs So, my question, assuming for the moment that nobody is able to read the cleartext in the tmpfs while it exists (I use umask to set cleartext to 0600), is there any way any trace of the cleartext could remain either in memory or on disk after the snippet above completes?

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• A possible case of hacked email account. What kind of an attack is this?

  - by Rickesh John

  I own a Yahoo mail account. I am using this account for sending resumes and receive notifications from various job portals. But yesterday, I found that some 10-15 mails had been sent to random addresses from my account. Most of them had this format: hr@<companyname>.com I am pretty sure that I didn't send any mails to such addresses. Initially, I thought the job portals may be sending mails on my behalf and Yahoo is logging them, but then I saw the contents. The contents of all those mails were a URL, which I did not click. SCARED. Also, to top it off, my "Sending Name" has been changed to 'Nice Maria'!! o_0 I have taken the necessary measures and changed my password and the secret question. I cannot delete this account as this email is registered with all the job portals and other companies. Is this a simple case of my account being compromised or was I a victim of some web vulnerability? All the mails seem to be bot generated, with only a URL as the message body. Please advice.

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• Is it possible to have an external server with in a companies firewall?

  - by Jonathan

  Hi guys, I am sure this is server admin 101,but I am unsure of the answer and would love some help. I am a software developer I have built an application for a client and am currently hosting it successfully on SliceHost. We are now coming out of Beta and the client wants to have the application within their Firewall, but they do not want to deal with headache of hosting and maintaining the server. Is there a way I can recommend that we put our server at SliceHost within their Firewall? Is that an easy thing to do? If that is not possible, what should I recommend to my client? Thanks! Jonathan

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• Which is the most independent and secure email service? [closed]

  - by Rafal

  I'm looking for a provider with a secure transfer protocol (like https) Secured (as much as it is possible) from being hacked or spied on. One that won't scan my email in order to display more accurate ads. One that won't sell my personal information. One that won't disclose my emails to some sort of government (it probably must be based outside of US or Chinese jurisdiction I reckon) Encrypted if possible. It can be simple and without huge storage. If you know/use any similar service I would be really grateful if you could point me there. Cheerz

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• How to detect form spamming on your web servers?

  - by splattne

  If you run hundred of web sites on your servers, what it is the most efficient, automated way to detect if bots are using your HTML forms to send spam email, even if your forms have some kind of protection?

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• Should windows services be created with custom users, or should I use one of LocalSystem/LocalServic

  - by Justin Dearing

  I'm asking the question in general for the average custom developed NT service or unix OSS daemon ported to windows with SCM support. However, at the moment my immediate concern is for mongodb. From my experience with UNIX I like all my services to run as different unprivileged users. The way this has translated to windows is as follows: Create a local (or domain if it has to talk to SQL server) windows user with a long random password (lately an ASCII85 encoded guid generated from a different machine). Set it to next expire and forbid it from changing its password. Remove that user from the "Users Group". Grant that user "Login as a Service" permission. Give it read permission to the folder where the app resides, and write permission to the logs and data files the applications use. Assign the user to the service. Troubleshoot until the service starts. My feeling is that the unprivileged users are less powerful than the 3 special service users. I also feel that by isolating which users run which services, I would limit collateral damage if a way to compromise one service was found.

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• GnuPG Command Line - Verifying KeePass Signature

  - by Stisfa

  I'm trying to verify the PGP Signature of the latest version of KeePass 2.14's setup file against this signature, but this is the output I receive: C:\Program Files (x86)\GNU\GnuPG>gpg.exe --verify C:\Users\User\Desktop\KeePass-2.14-Setup.exe gpg: no valid OpenPGP data found. gpg: the signature could not be verified. Please remember that the signature file (.sig or .asc) should be the first file given on the command line. C:\Program Files (x86)\GNU\GnuPG> I found this command here, but it made no mention about ".sig" or ".asc" files, so I figured I did something wrong. By reading (http://www.gnupg.org/documentation/manuals/gnupg/gpgv.html#gpgv), I further tried the following: C:\Program Files (x86)\GNU\GnuPG>gpg.exe --pgpfile C:\Users\User\Desktop\KeePass-2.14-Setup.exe gpg: Invalid option "--pgpfile" C:\Program Files (x86)\GNU\GnuPG> As you can see, the results are quite obfuscating... I took a look at this on SuperUser (http://superuser.com/questions/16160/short-easy-to-understand-explanation-of-gpg-pgp-for-nontechnical-people - I couldn't use "a href" due to the built in spam filter that discriminates against users with < 10 rep; this is the same reason for the link above this link), but none of the links seemed to really address my question, at least not directly enough for me to get any idea on how to move forward on this. Can anybody here help me with the esoteric technicality of OpenPGP & the associated use of the GnuPG program? I've felt pretty dumb learning VBS, but this is beyond humiliating: it's absolutely debilitating and maiming whatever confidence I had with my IT skills (then again, I have no justification for making any boast either, as I have yet to get my A+ Cert, lol).

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